/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/parallel/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:25:22,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:25:22,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:25:22,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:25:22,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 22:25:22,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:25:22,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:25:22,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:25:22,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:25:22,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:25:22,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:25:22,831 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:25:22,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:25:22,831 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:25:22,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:25:22,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:25:22,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:25:22,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:25:22,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:25:22,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:25:22,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:25:22,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:25:22,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:25:22,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:25:22,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:25:22,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:25:22,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:25:22,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:25:22,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:25:22,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:25:22,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:25:22,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:25:22,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:25:22,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:25:22,834 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:25:22,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:25:22,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:25:23,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:25:23,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:25:23,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:25:23,179 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:25:23,180 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:25:23,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2021-03-10 22:25:23,181 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2021-03-10 22:25:23,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:25:23,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:25:23,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:25:23,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:25:23,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:25:23,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:25:23,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:25:23,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:25:23,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:25:23,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... [2021-03-10 22:25:23,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:25:23,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:25:23,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:25:23,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:25:23,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:25:23,351 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:25:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:25:23,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:25:23,352 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:25:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:25:23,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:25:23,352 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:25:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:25:23,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:25:23,353 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:25:23,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:25:23,542 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:25:23,544 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:25:23 BoogieIcfgContainer [2021-03-10 22:25:23,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:25:23,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:25:23,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:25:23,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:25:23,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:25:23" (1/2) ... [2021-03-10 22:25:23,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3d35f5 and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:25:23, skipping insertion in model container [2021-03-10 22:25:23,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:25:23" (2/2) ... [2021-03-10 22:25:23,549 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2021-03-10 22:25:23,570 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:25:23,570 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:25:23,573 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:25:23,574 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:25:23,625 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 22:25:23,640 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 22:25:23,656 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:25:23,656 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:25:23,656 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:25:23,656 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:25:23,656 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:25:23,656 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:25:23,657 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:25:23,657 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:25:23,665 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2021-03-10 22:25:23,684 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 22:25:23,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:23,695 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:23,696 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:23,706 INFO L82 PathProgramCache]: Analyzing trace with hash -884848578, now seen corresponding path program 1 times [2021-03-10 22:25:23,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:23,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440067405] [2021-03-10 22:25:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:23,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440067405] [2021-03-10 22:25:23,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:25:23,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:25:23,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230412332] [2021-03-10 22:25:23,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:25:23,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:25:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:25:23,983 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 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 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:24,131 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2021-03-10 22:25:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:25:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 22:25:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:24,144 INFO L225 Difference]: With dead ends: 299 [2021-03-10 22:25:24,144 INFO L226 Difference]: Without dead ends: 286 [2021-03-10 22:25:24,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:25:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-03-10 22:25:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2021-03-10 22:25:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-03-10 22:25:24,189 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2021-03-10 22:25:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:24,190 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-03-10 22:25:24,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-03-10 22:25:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:25:24,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:24,192 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:24,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:25:24,192 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash 961813113, now seen corresponding path program 1 times [2021-03-10 22:25:24,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:24,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053669568] [2021-03-10 22:25:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:24,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053669568] [2021-03-10 22:25:24,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568361604] [2021-03-10 22:25:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:25:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:24,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:24,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 22:25:24,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91172297] [2021-03-10 22:25:24,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:25:24,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:24,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:25:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:25:24,469 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:24,559 INFO L93 Difference]: Finished difference Result 284 states and 599 transitions. [2021-03-10 22:25:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:25:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:25:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:24,562 INFO L225 Difference]: With dead ends: 284 [2021-03-10 22:25:24,562 INFO L226 Difference]: Without dead ends: 284 [2021-03-10 22:25:24,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:25:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-03-10 22:25:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 124. [2021-03-10 22:25:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-03-10 22:25:24,589 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2021-03-10 22:25:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:24,589 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-03-10 22:25:24,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-03-10 22:25:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:25:24,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:24,591 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:24,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 22:25:24,792 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash 713419811, now seen corresponding path program 1 times [2021-03-10 22:25:24,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:24,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298523693] [2021-03-10 22:25:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298523693] [2021-03-10 22:25:24,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:25:24,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:25:24,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476837154] [2021-03-10 22:25:24,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:25:24,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:24,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:25:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:25:24,850 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:24,928 INFO L93 Difference]: Finished difference Result 166 states and 354 transitions. [2021-03-10 22:25:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:25:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:25:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:24,930 INFO L225 Difference]: With dead ends: 166 [2021-03-10 22:25:24,930 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 22:25:24,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:25:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 22:25:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2021-03-10 22:25:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-03-10 22:25:24,945 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2021-03-10 22:25:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:24,950 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-03-10 22:25:24,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-03-10 22:25:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:25:24,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:24,954 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:24,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:25:24,955 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1233373665, now seen corresponding path program 2 times [2021-03-10 22:25:24,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:24,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255168629] [2021-03-10 22:25:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:25,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255168629] [2021-03-10 22:25:25,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651585450] [2021-03-10 22:25:25,031 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 [2021-03-10 22:25:25,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:25:25,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:25:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:25,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:25,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-03-10 22:25:25,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896562289] [2021-03-10 22:25:25,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:25:25,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:25,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:25:25,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:25:25,132 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:25,263 INFO L93 Difference]: Finished difference Result 242 states and 545 transitions. [2021-03-10 22:25:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:25:25,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:25:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:25,266 INFO L225 Difference]: With dead ends: 242 [2021-03-10 22:25:25,266 INFO L226 Difference]: Without dead ends: 242 [2021-03-10 22:25:25,267 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:25:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-03-10 22:25:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2021-03-10 22:25:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-03-10 22:25:25,294 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2021-03-10 22:25:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:25,294 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-03-10 22:25:25,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-03-10 22:25:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:25:25,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:25,298 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:25,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:25,519 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1164039970, now seen corresponding path program 1 times [2021-03-10 22:25:25,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:25,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422685675] [2021-03-10 22:25:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:25,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422685675] [2021-03-10 22:25:25,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508882506] [2021-03-10 22:25:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:25,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:25:25,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:25,931 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 [2021-03-10 22:25:25,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:25,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:25,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:25,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-03-10 22:25:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:25,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:25,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-03-10 22:25:25,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648548046] [2021-03-10 22:25:25,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:25:25,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:25:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:25:25,984 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:26,266 INFO L93 Difference]: Finished difference Result 441 states and 1008 transitions. [2021-03-10 22:25:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:26,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:25:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:26,270 INFO L225 Difference]: With dead ends: 441 [2021-03-10 22:25:26,270 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 22:25:26,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:25:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 22:25:26,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2021-03-10 22:25:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-03-10 22:25:26,292 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 21 [2021-03-10 22:25:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:26,292 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-03-10 22:25:26,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-03-10 22:25:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:25:26,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:26,293 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:26,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:26,518 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash 501161696, now seen corresponding path program 2 times [2021-03-10 22:25:26,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:26,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298923783] [2021-03-10 22:25:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:26,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298923783] [2021-03-10 22:25:26,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042263047] [2021-03-10 22:25:26,721 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:26,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:25:26,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:25:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:26,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 22:25:26,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:26,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:26,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:26,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-03-10 22:25:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:26,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:26,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-03-10 22:25:26,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875588509] [2021-03-10 22:25:26,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:25:26,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:25:26,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:25:26,908 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:27,147 INFO L93 Difference]: Finished difference Result 432 states and 992 transitions. [2021-03-10 22:25:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:27,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 21 [2021-03-10 22:25:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:27,151 INFO L225 Difference]: With dead ends: 432 [2021-03-10 22:25:27,151 INFO L226 Difference]: Without dead ends: 423 [2021-03-10 22:25:27,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:25:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-03-10 22:25:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2021-03-10 22:25:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1940298507462686) internal successors, (441), 201 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 441 transitions. [2021-03-10 22:25:27,161 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 441 transitions. Word has length 21 [2021-03-10 22:25:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:27,163 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 441 transitions. [2021-03-10 22:25:27,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 441 transitions. [2021-03-10 22:25:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:25:27,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:27,164 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:27,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:27,383 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2037404550, now seen corresponding path program 3 times [2021-03-10 22:25:27,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:27,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014022136] [2021-03-10 22:25:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:27,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014022136] [2021-03-10 22:25:27,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19937886] [2021-03-10 22:25:27,547 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:27,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:25:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:27,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:25:27,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:27,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 22:25:27,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:27,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:27,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:27,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-03-10 22:25:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:27,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:27,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-03-10 22:25:27,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406059583] [2021-03-10 22:25:27,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:25:27,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:27,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:25:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:25:27,729 INFO L87 Difference]: Start difference. First operand 202 states and 441 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:27,956 INFO L93 Difference]: Finished difference Result 440 states and 1008 transitions. [2021-03-10 22:25:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:27,956 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:25:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:27,959 INFO L225 Difference]: With dead ends: 440 [2021-03-10 22:25:27,959 INFO L226 Difference]: Without dead ends: 429 [2021-03-10 22:25:27,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:25:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-03-10 22:25:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 199. [2021-03-10 22:25:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.191919191919192) internal successors, (434), 198 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 434 transitions. [2021-03-10 22:25:27,970 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 434 transitions. Word has length 21 [2021-03-10 22:25:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:27,971 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 434 transitions. [2021-03-10 22:25:27,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 434 transitions. [2021-03-10 22:25:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:25:27,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:27,972 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:28,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 22:25:28,191 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:28,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:28,191 INFO L82 PathProgramCache]: Analyzing trace with hash 107399676, now seen corresponding path program 4 times [2021-03-10 22:25:28,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:28,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003498100] [2021-03-10 22:25:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:28,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003498100] [2021-03-10 22:25:28,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928790228] [2021-03-10 22:25:28,380 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:28,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:25:28,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:25:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:28,510 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 [2021-03-10 22:25:28,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:28,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:28,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:28,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-03-10 22:25:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:28,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:28,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-03-10 22:25:28,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36391802] [2021-03-10 22:25:28,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:25:28,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:28,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:25:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:25:28,563 INFO L87 Difference]: Start difference. First operand 199 states and 434 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:28,880 INFO L93 Difference]: Finished difference Result 471 states and 1075 transitions. [2021-03-10 22:25:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:25:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 21 [2021-03-10 22:25:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:28,886 INFO L225 Difference]: With dead ends: 471 [2021-03-10 22:25:28,886 INFO L226 Difference]: Without dead ends: 462 [2021-03-10 22:25:28,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:25:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-10 22:25:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 224. [2021-03-10 22:25:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-03-10 22:25:28,894 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-03-10 22:25:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:28,896 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-03-10 22:25:28,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-03-10 22:25:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:25:28,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:28,897 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:29,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:29,111 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash -513087460, now seen corresponding path program 5 times [2021-03-10 22:25:29,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:29,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610031878] [2021-03-10 22:25:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:29,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610031878] [2021-03-10 22:25:29,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592674553] [2021-03-10 22:25:29,293 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:29,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:25:29,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:29,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:25:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:29,419 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-03-10 22:25:29,420 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-03-10 22:25:29,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:29,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:29,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:29,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:10 [2021-03-10 22:25:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:29,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:29,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-03-10 22:25:29,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779734260] [2021-03-10 22:25:29,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:25:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:25:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:25:29,490 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:29,771 INFO L93 Difference]: Finished difference Result 472 states and 1084 transitions. [2021-03-10 22:25:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:25:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 21 [2021-03-10 22:25:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:29,774 INFO L225 Difference]: With dead ends: 472 [2021-03-10 22:25:29,774 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 22:25:29,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:25:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 22:25:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 233. [2021-03-10 22:25:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.206896551724138) internal successors, (512), 232 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 512 transitions. [2021-03-10 22:25:29,784 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 512 transitions. Word has length 21 [2021-03-10 22:25:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:29,784 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 512 transitions. [2021-03-10 22:25:29,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 512 transitions. [2021-03-10 22:25:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:25:29,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:29,785 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:30,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:30,009 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 152115708, now seen corresponding path program 6 times [2021-03-10 22:25:30,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:30,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875842459] [2021-03-10 22:25:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:30,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875842459] [2021-03-10 22:25:30,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176942466] [2021-03-10 22:25:30,167 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:30,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:25:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:30,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:25:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:30,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 22:25:30,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:30,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:30,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:30,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-03-10 22:25:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:30,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:30,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-03-10 22:25:30,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550751220] [2021-03-10 22:25:30,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:25:30,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:30,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:25:30,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:25:30,332 INFO L87 Difference]: Start difference. First operand 233 states and 512 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:30,630 INFO L93 Difference]: Finished difference Result 469 states and 1074 transitions. [2021-03-10 22:25:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:25:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 21 [2021-03-10 22:25:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:30,632 INFO L225 Difference]: With dead ends: 469 [2021-03-10 22:25:30,632 INFO L226 Difference]: Without dead ends: 458 [2021-03-10 22:25:30,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:25:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-03-10 22:25:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 224. [2021-03-10 22:25:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-03-10 22:25:30,640 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-03-10 22:25:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:30,640 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-03-10 22:25:30,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-03-10 22:25:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:30,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:30,642 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:30,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:25:30,864 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:30,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash -696020967, now seen corresponding path program 7 times [2021-03-10 22:25:30,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:30,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816860964] [2021-03-10 22:25:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:30,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816860964] [2021-03-10 22:25:30,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117648409] [2021-03-10 22:25:30,899 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 [2021-03-10 22:25:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:30,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:30,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:25:30,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545196432] [2021-03-10 22:25:30,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:25:30,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:30,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:25:30,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:25:30,976 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:31,098 INFO L93 Difference]: Finished difference Result 475 states and 1004 transitions. [2021-03-10 22:25:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:31,100 INFO L225 Difference]: With dead ends: 475 [2021-03-10 22:25:31,100 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 22:25:31,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:25:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 22:25:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 295. [2021-03-10 22:25:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.302721088435374) internal successors, (677), 294 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 677 transitions. [2021-03-10 22:25:31,111 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 677 transitions. Word has length 25 [2021-03-10 22:25:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:31,111 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 677 transitions. [2021-03-10 22:25:31,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 677 transitions. [2021-03-10 22:25:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:31,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:31,114 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:31,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:31,336 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1371569347, now seen corresponding path program 8 times [2021-03-10 22:25:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:31,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831473006] [2021-03-10 22:25:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:31,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831473006] [2021-03-10 22:25:31,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165154855] [2021-03-10 22:25:31,371 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 [2021-03-10 22:25:31,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:25:31,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:31,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:31,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:31,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:31,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:25:31,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344593737] [2021-03-10 22:25:31,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:25:31,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:31,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:25:31,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:25:31,443 INFO L87 Difference]: Start difference. First operand 295 states and 677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:31,577 INFO L93 Difference]: Finished difference Result 596 states and 1335 transitions. [2021-03-10 22:25:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:31,582 INFO L225 Difference]: With dead ends: 596 [2021-03-10 22:25:31,582 INFO L226 Difference]: Without dead ends: 565 [2021-03-10 22:25:31,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:25:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-10 22:25:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 476. [2021-03-10 22:25:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.351578947368421) internal successors, (1117), 475 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1117 transitions. [2021-03-10 22:25:31,597 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1117 transitions. Word has length 25 [2021-03-10 22:25:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:31,597 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1117 transitions. [2021-03-10 22:25:31,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:31,598 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1117 transitions. [2021-03-10 22:25:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:31,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:31,600 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:31,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:31,819 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2027124135, now seen corresponding path program 9 times [2021-03-10 22:25:31,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:31,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033218747] [2021-03-10 22:25:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:31,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033218747] [2021-03-10 22:25:31,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412385719] [2021-03-10 22:25:31,858 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) [2021-03-10 22:25:31,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:25:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:31,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:31,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:25:31,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334276162] [2021-03-10 22:25:31,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:25:31,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:25:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:25:31,949 INFO L87 Difference]: Start difference. First operand 476 states and 1117 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:32,048 INFO L93 Difference]: Finished difference Result 552 states and 1237 transitions. [2021-03-10 22:25:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:32,050 INFO L225 Difference]: With dead ends: 552 [2021-03-10 22:25:32,050 INFO L226 Difference]: Without dead ends: 552 [2021-03-10 22:25:32,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:25:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-03-10 22:25:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 471. [2021-03-10 22:25:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.331914893617021) internal successors, (1096), 470 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1096 transitions. [2021-03-10 22:25:32,063 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1096 transitions. Word has length 25 [2021-03-10 22:25:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:32,063 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 1096 transitions. [2021-03-10 22:25:32,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1096 transitions. [2021-03-10 22:25:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:32,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:32,065 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:32,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 22:25:32,279 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:32,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1525256391, now seen corresponding path program 10 times [2021-03-10 22:25:32,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:32,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274028951] [2021-03-10 22:25:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:32,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274028951] [2021-03-10 22:25:32,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729330636] [2021-03-10 22:25:32,316 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 [2021-03-10 22:25:32,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:25:32,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:32,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:32,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:32,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:25:32,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963476845] [2021-03-10 22:25:32,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:25:32,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:25:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:25:32,395 INFO L87 Difference]: Start difference. First operand 471 states and 1096 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:32,493 INFO L93 Difference]: Finished difference Result 568 states and 1272 transitions. [2021-03-10 22:25:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:25:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:32,496 INFO L225 Difference]: With dead ends: 568 [2021-03-10 22:25:32,496 INFO L226 Difference]: Without dead ends: 565 [2021-03-10 22:25:32,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:25:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-10 22:25:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 474. [2021-03-10 22:25:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.3255813953488373) internal successors, (1100), 473 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1100 transitions. [2021-03-10 22:25:32,511 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1100 transitions. Word has length 25 [2021-03-10 22:25:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:32,511 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 1100 transitions. [2021-03-10 22:25:32,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1100 transitions. [2021-03-10 22:25:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:32,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:32,512 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:32,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:25:32,727 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1162212465, now seen corresponding path program 11 times [2021-03-10 22:25:32,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:32,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728157138] [2021-03-10 22:25:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:32,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728157138] [2021-03-10 22:25:32,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139162069] [2021-03-10 22:25:32,766 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 [2021-03-10 22:25:32,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:25:32,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:32,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:25:32,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:32,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:25:32,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155224787] [2021-03-10 22:25:32,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:25:32,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:25:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:25:32,859 INFO L87 Difference]: Start difference. First operand 474 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:32,956 INFO L93 Difference]: Finished difference Result 699 states and 1561 transitions. [2021-03-10 22:25:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:32,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:32,960 INFO L225 Difference]: With dead ends: 699 [2021-03-10 22:25:32,960 INFO L226 Difference]: Without dead ends: 699 [2021-03-10 22:25:32,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:25:32,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-03-10 22:25:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 552. [2021-03-10 22:25:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.3611615245009077) internal successors, (1301), 551 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1301 transitions. [2021-03-10 22:25:32,977 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1301 transitions. Word has length 25 [2021-03-10 22:25:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:32,978 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 1301 transitions. [2021-03-10 22:25:32,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1301 transitions. [2021-03-10 22:25:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:32,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:32,980 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:33,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:25:33,202 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1664080209, now seen corresponding path program 12 times [2021-03-10 22:25:33,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:33,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223558980] [2021-03-10 22:25:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:33,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223558980] [2021-03-10 22:25:33,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012042169] [2021-03-10 22:25:33,229 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 [2021-03-10 22:25:33,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:25:33,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:25:33,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:33,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:25:33,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638296443] [2021-03-10 22:25:33,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:25:33,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:33,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:25:33,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:25:33,295 INFO L87 Difference]: Start difference. First operand 552 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:33,396 INFO L93 Difference]: Finished difference Result 875 states and 2015 transitions. [2021-03-10 22:25:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:25:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:33,400 INFO L225 Difference]: With dead ends: 875 [2021-03-10 22:25:33,400 INFO L226 Difference]: Without dead ends: 872 [2021-03-10 22:25:33,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:25:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-03-10 22:25:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 717. [2021-03-10 22:25:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.403631284916201) internal successors, (1721), 716 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1721 transitions. [2021-03-10 22:25:33,423 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1721 transitions. Word has length 25 [2021-03-10 22:25:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:33,424 INFO L480 AbstractCegarLoop]: Abstraction has 717 states and 1721 transitions. [2021-03-10 22:25:33,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1721 transitions. [2021-03-10 22:25:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:33,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:33,426 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:33,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:33,631 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:33,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1322657579, now seen corresponding path program 13 times [2021-03-10 22:25:33,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:33,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969137744] [2021-03-10 22:25:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:33,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969137744] [2021-03-10 22:25:33,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386202016] [2021-03-10 22:25:33,659 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 [2021-03-10 22:25:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:25:33,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:33,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:25:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180730325] [2021-03-10 22:25:33,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:25:33,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:25:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:25:33,722 INFO L87 Difference]: Start difference. First operand 717 states and 1721 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:33,816 INFO L93 Difference]: Finished difference Result 880 states and 2012 transitions. [2021-03-10 22:25:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:33,820 INFO L225 Difference]: With dead ends: 880 [2021-03-10 22:25:33,820 INFO L226 Difference]: Without dead ends: 880 [2021-03-10 22:25:33,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:25:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-03-10 22:25:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 703. [2021-03-10 22:25:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4017094017094016) internal successors, (1686), 702 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1686 transitions. [2021-03-10 22:25:33,837 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1686 transitions. Word has length 25 [2021-03-10 22:25:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:33,837 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1686 transitions. [2021-03-10 22:25:33,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1686 transitions. [2021-03-10 22:25:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:33,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:33,839 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:34,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:25:34,055 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2065651895, now seen corresponding path program 14 times [2021-03-10 22:25:34,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:34,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149500459] [2021-03-10 22:25:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:34,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149500459] [2021-03-10 22:25:34,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922520957] [2021-03-10 22:25:34,095 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 [2021-03-10 22:25:34,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:25:34,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:25:34,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:34,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:25:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853524394] [2021-03-10 22:25:34,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:25:34,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:25:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:25:34,164 INFO L87 Difference]: Start difference. First operand 703 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:34,278 INFO L93 Difference]: Finished difference Result 810 states and 1869 transitions. [2021-03-10 22:25:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:25:34,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:34,282 INFO L225 Difference]: With dead ends: 810 [2021-03-10 22:25:34,282 INFO L226 Difference]: Without dead ends: 806 [2021-03-10 22:25:34,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:25:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-03-10 22:25:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 703. [2021-03-10 22:25:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4002849002849005) internal successors, (1685), 702 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1685 transitions. [2021-03-10 22:25:34,305 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1685 transitions. Word has length 25 [2021-03-10 22:25:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:34,305 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1685 transitions. [2021-03-10 22:25:34,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1685 transitions. [2021-03-10 22:25:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:34,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:34,307 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:34,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:25:34,527 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash 893466037, now seen corresponding path program 15 times [2021-03-10 22:25:34,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:34,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744391468] [2021-03-10 22:25:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:34,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744391468] [2021-03-10 22:25:34,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587903725] [2021-03-10 22:25:34,573 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) [2021-03-10 22:25:34,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:25:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:34,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:34,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:34,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:34,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:25:34,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126802178] [2021-03-10 22:25:34,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:25:34,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:34,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:25:34,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:25:34,680 INFO L87 Difference]: Start difference. First operand 703 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:34,800 INFO L93 Difference]: Finished difference Result 795 states and 1844 transitions. [2021-03-10 22:25:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:34,803 INFO L225 Difference]: With dead ends: 795 [2021-03-10 22:25:34,803 INFO L226 Difference]: Without dead ends: 795 [2021-03-10 22:25:34,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:25:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-03-10 22:25:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 698. [2021-03-10 22:25:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.3916786226685796) internal successors, (1667), 697 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1667 transitions. [2021-03-10 22:25:34,818 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1667 transitions. Word has length 25 [2021-03-10 22:25:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:34,818 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 1667 transitions. [2021-03-10 22:25:34,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1667 transitions. [2021-03-10 22:25:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:25:34,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:34,820 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:35,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:35,035 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:35,036 INFO L82 PathProgramCache]: Analyzing trace with hash -886523081, now seen corresponding path program 16 times [2021-03-10 22:25:35,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:35,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111259502] [2021-03-10 22:25:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:35,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111259502] [2021-03-10 22:25:35,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849827267] [2021-03-10 22:25:35,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:35,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:25:35,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:35,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:25:35,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:35,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:35,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:25:35,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888491585] [2021-03-10 22:25:35,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:25:35,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:35,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:25:35,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:25:35,136 INFO L87 Difference]: Start difference. First operand 698 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:35,247 INFO L93 Difference]: Finished difference Result 856 states and 1953 transitions. [2021-03-10 22:25:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:25:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:25:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:35,250 INFO L225 Difference]: With dead ends: 856 [2021-03-10 22:25:35,250 INFO L226 Difference]: Without dead ends: 835 [2021-03-10 22:25:35,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:25:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-03-10 22:25:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 719. [2021-03-10 22:25:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.370473537604457) internal successors, (1702), 718 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1702 transitions. [2021-03-10 22:25:35,265 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1702 transitions. Word has length 25 [2021-03-10 22:25:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:35,265 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 1702 transitions. [2021-03-10 22:25:35,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1702 transitions. [2021-03-10 22:25:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:35,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:35,267 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:35,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:35,490 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:35,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1579561346, now seen corresponding path program 17 times [2021-03-10 22:25:35,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:35,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138945126] [2021-03-10 22:25:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:35,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138945126] [2021-03-10 22:25:35,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267846624] [2021-03-10 22:25:35,846 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) [2021-03-10 22:25:35,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:25:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:25:35,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:36,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:25:36,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:36,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:36,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:36,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:25:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:36,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:36,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 22:25:36,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506604395] [2021-03-10 22:25:36,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:25:36,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:36,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:25:36,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:25:36,097 INFO L87 Difference]: Start difference. First operand 719 states and 1702 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:37,261 INFO L93 Difference]: Finished difference Result 1938 states and 4685 transitions. [2021-03-10 22:25:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:25:37,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:25:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:37,270 INFO L225 Difference]: With dead ends: 1938 [2021-03-10 22:25:37,270 INFO L226 Difference]: Without dead ends: 1928 [2021-03-10 22:25:37,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:25:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-03-10 22:25:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 773. [2021-03-10 22:25:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.36139896373057) internal successors, (1823), 772 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1823 transitions. [2021-03-10 22:25:37,295 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1823 transitions. Word has length 29 [2021-03-10 22:25:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:37,295 INFO L480 AbstractCegarLoop]: Abstraction has 773 states and 1823 transitions. [2021-03-10 22:25:37,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1823 transitions. [2021-03-10 22:25:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:37,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:37,297 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:37,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:37,511 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash 298021654, now seen corresponding path program 18 times [2021-03-10 22:25:37,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:37,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849034233] [2021-03-10 22:25:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:37,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849034233] [2021-03-10 22:25:37,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777491810] [2021-03-10 22:25:37,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:37,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:25:37,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:25:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:38,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:25:38,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:38,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:38,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:38,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-03-10 22:25:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:38,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:38,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-03-10 22:25:38,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141203983] [2021-03-10 22:25:38,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:25:38,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:25:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:25:38,092 INFO L87 Difference]: Start difference. First operand 773 states and 1823 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:39,172 INFO L93 Difference]: Finished difference Result 2173 states and 5321 transitions. [2021-03-10 22:25:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:25:39,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-03-10 22:25:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:39,179 INFO L225 Difference]: With dead ends: 2173 [2021-03-10 22:25:39,179 INFO L226 Difference]: Without dead ends: 2162 [2021-03-10 22:25:39,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 851.5ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:25:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-03-10 22:25:39,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 807. [2021-03-10 22:25:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3734491315136474) internal successors, (1913), 806 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1913 transitions. [2021-03-10 22:25:39,204 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1913 transitions. Word has length 29 [2021-03-10 22:25:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:39,204 INFO L480 AbstractCegarLoop]: Abstraction has 807 states and 1913 transitions. [2021-03-10 22:25:39,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1913 transitions. [2021-03-10 22:25:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:39,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:39,207 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:39,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 22:25:39,434 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:39,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2054422704, now seen corresponding path program 19 times [2021-03-10 22:25:39,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:39,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694930850] [2021-03-10 22:25:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:39,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694930850] [2021-03-10 22:25:39,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333494211] [2021-03-10 22:25:39,766 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) [2021-03-10 22:25:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:39,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:25:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:39,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:25:39,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:39,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:39,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:39,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-03-10 22:25:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:39,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:39,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-03-10 22:25:39,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205877933] [2021-03-10 22:25:40,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:25:40,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:40,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:25:40,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:25:40,000 INFO L87 Difference]: Start difference. First operand 807 states and 1913 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:41,332 INFO L93 Difference]: Finished difference Result 2310 states and 5631 transitions. [2021-03-10 22:25:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:25:41,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-03-10 22:25:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:41,342 INFO L225 Difference]: With dead ends: 2310 [2021-03-10 22:25:41,342 INFO L226 Difference]: Without dead ends: 2290 [2021-03-10 22:25:41,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 937.7ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:25:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-03-10 22:25:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 796. [2021-03-10 22:25:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.372327044025157) internal successors, (1886), 795 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1886 transitions. [2021-03-10 22:25:41,371 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1886 transitions. Word has length 29 [2021-03-10 22:25:41,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:41,371 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 1886 transitions. [2021-03-10 22:25:41,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1886 transitions. [2021-03-10 22:25:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:41,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:41,374 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:41,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:25:41,591 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash 483082792, now seen corresponding path program 20 times [2021-03-10 22:25:41,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:41,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20265337] [2021-03-10 22:25:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:41,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20265337] [2021-03-10 22:25:41,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065092715] [2021-03-10 22:25:41,856 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 [2021-03-10 22:25:41,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:25:41,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:41,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:25:41,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:42,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:25:42,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:42,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:42,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:42,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:25:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:42,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:42,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 22:25:42,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774060140] [2021-03-10 22:25:42,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:25:42,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:42,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:25:42,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:25:42,124 INFO L87 Difference]: Start difference. First operand 796 states and 1886 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:43,382 INFO L93 Difference]: Finished difference Result 2101 states and 5071 transitions. [2021-03-10 22:25:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:25:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:25:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:43,391 INFO L225 Difference]: With dead ends: 2101 [2021-03-10 22:25:43,391 INFO L226 Difference]: Without dead ends: 2078 [2021-03-10 22:25:43,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 835.4ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:25:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-03-10 22:25:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 800. [2021-03-10 22:25:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-03-10 22:25:43,416 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-03-10 22:25:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:43,417 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-03-10 22:25:43,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-03-10 22:25:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:43,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:43,419 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:43,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:43,632 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash -830162232, now seen corresponding path program 21 times [2021-03-10 22:25:43,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:43,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125441651] [2021-03-10 22:25:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:43,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125441651] [2021-03-10 22:25:43,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831289518] [2021-03-10 22:25:43,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:43,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:25:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:43,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:25:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:44,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:25:44,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:25:44,300 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 28 treesize of output 16 [2021-03-10 22:25:44,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:44,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:44,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:44,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:10 [2021-03-10 22:25:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:44,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:44,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 22:25:44,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726710211] [2021-03-10 22:25:44,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:25:44,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:25:44,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:25:44,336 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:45,645 INFO L93 Difference]: Finished difference Result 1859 states and 4469 transitions. [2021-03-10 22:25:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:25:45,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:25:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:45,650 INFO L225 Difference]: With dead ends: 1859 [2021-03-10 22:25:45,650 INFO L226 Difference]: Without dead ends: 1849 [2021-03-10 22:25:45,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 996.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:25:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-03-10 22:25:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 800. [2021-03-10 22:25:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-03-10 22:25:45,671 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-03-10 22:25:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:45,671 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-03-10 22:25:45,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-03-10 22:25:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:45,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:45,673 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:45,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 22:25:45,895 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:45,896 INFO L82 PathProgramCache]: Analyzing trace with hash 813575516, now seen corresponding path program 22 times [2021-03-10 22:25:45,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:45,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410403283] [2021-03-10 22:25:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:46,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410403283] [2021-03-10 22:25:46,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245293792] [2021-03-10 22:25:46,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:46,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:25:46,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:25:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:46,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:25:46,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:46,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:46,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:46,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:25:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:46,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:46,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-03-10 22:25:46,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788573860] [2021-03-10 22:25:46,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:25:46,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:46,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:25:46,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:25:46,423 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:47,927 INFO L93 Difference]: Finished difference Result 2092 states and 5123 transitions. [2021-03-10 22:25:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:25:47,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-03-10 22:25:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:47,936 INFO L225 Difference]: With dead ends: 2092 [2021-03-10 22:25:47,936 INFO L226 Difference]: Without dead ends: 2083 [2021-03-10 22:25:47,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 933.1ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:25:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-03-10 22:25:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 825. [2021-03-10 22:25:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.371359223300971) internal successors, (1954), 824 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1954 transitions. [2021-03-10 22:25:47,961 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1954 transitions. Word has length 29 [2021-03-10 22:25:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:47,961 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 1954 transitions. [2021-03-10 22:25:47,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1954 transitions. [2021-03-10 22:25:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:47,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:47,963 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:48,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:48,185 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash 193088380, now seen corresponding path program 23 times [2021-03-10 22:25:48,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:48,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793274153] [2021-03-10 22:25:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793274153] [2021-03-10 22:25:48,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051408708] [2021-03-10 22:25:48,502 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) [2021-03-10 22:25:48,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:25:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:25:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:25:48,702 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:25:48,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-03-10 22:25:48,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:48,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:48,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:48,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-03-10 22:25:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:48,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:48,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-03-10 22:25:48,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159571659] [2021-03-10 22:25:48,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:25:48,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:48,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:25:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:25:48,752 INFO L87 Difference]: Start difference. First operand 825 states and 1954 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:49,929 INFO L93 Difference]: Finished difference Result 2113 states and 5192 transitions. [2021-03-10 22:25:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:25:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 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 29 [2021-03-10 22:25:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:49,933 INFO L225 Difference]: With dead ends: 2113 [2021-03-10 22:25:49,933 INFO L226 Difference]: Without dead ends: 2102 [2021-03-10 22:25:49,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 904.9ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:25:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-03-10 22:25:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 837. [2021-03-10 22:25:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.373205741626794) internal successors, (1984), 836 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1984 transitions. [2021-03-10 22:25:49,952 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1984 transitions. Word has length 29 [2021-03-10 22:25:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:49,952 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1984 transitions. [2021-03-10 22:25:49,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1984 transitions. [2021-03-10 22:25:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:49,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:49,954 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:50,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:25:50,167 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:50,168 INFO L82 PathProgramCache]: Analyzing trace with hash 858291548, now seen corresponding path program 24 times [2021-03-10 22:25:50,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:50,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200401305] [2021-03-10 22:25:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:50,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200401305] [2021-03-10 22:25:50,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349658995] [2021-03-10 22:25:50,498 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 [2021-03-10 22:25:50,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:25:50,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:50,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:25:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:50,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:50,689 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-10 22:25:50,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 22:25:50,754 INFO L628 ElimStorePlain]: treesize reduction 24, result has 65.2 percent of original size [2021-03-10 22:25:50,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:50,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:45 [2021-03-10 22:25:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:50,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:50,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-03-10 22:25:50,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490522624] [2021-03-10 22:25:50,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:25:50,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:50,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:25:50,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:25:50,880 INFO L87 Difference]: Start difference. First operand 837 states and 1984 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:53,151 INFO L93 Difference]: Finished difference Result 2343 states and 5770 transitions. [2021-03-10 22:25:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:25:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:25:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:53,155 INFO L225 Difference]: With dead ends: 2343 [2021-03-10 22:25:53,155 INFO L226 Difference]: Without dead ends: 2322 [2021-03-10 22:25:53,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1795.9ms TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 22:25:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-03-10 22:25:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 824. [2021-03-10 22:25:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-03-10 22:25:53,175 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-03-10 22:25:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:53,175 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-03-10 22:25:53,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-03-10 22:25:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:53,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:53,177 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:53,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 22:25:53,399 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:53,400 INFO L82 PathProgramCache]: Analyzing trace with hash -949069254, now seen corresponding path program 25 times [2021-03-10 22:25:53,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:53,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686644711] [2021-03-10 22:25:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:53,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686644711] [2021-03-10 22:25:53,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326456009] [2021-03-10 22:25:53,700 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 [2021-03-10 22:25:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:25:53,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:53,918 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:25:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-03-10 22:25:53,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:53,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:53,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:53,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-03-10 22:25:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:53,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:53,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-03-10 22:25:53,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074788640] [2021-03-10 22:25:53,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:25:53,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:25:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:25:53,962 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:55,257 INFO L93 Difference]: Finished difference Result 2128 states and 5217 transitions. [2021-03-10 22:25:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:25:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-03-10 22:25:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:55,261 INFO L225 Difference]: With dead ends: 2128 [2021-03-10 22:25:55,261 INFO L226 Difference]: Without dead ends: 2117 [2021-03-10 22:25:55,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 970.4ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:25:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-03-10 22:25:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 845. [2021-03-10 22:25:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.376777251184834) internal successors, (2006), 844 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2006 transitions. [2021-03-10 22:25:55,283 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2006 transitions. Word has length 29 [2021-03-10 22:25:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:55,283 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2006 transitions. [2021-03-10 22:25:55,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2006 transitions. [2021-03-10 22:25:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:55,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:55,285 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:55,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:25:55,498 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash 807331796, now seen corresponding path program 26 times [2021-03-10 22:25:55,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:55,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125789222] [2021-03-10 22:25:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:55,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125789222] [2021-03-10 22:25:55,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486527290] [2021-03-10 22:25:55,884 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 [2021-03-10 22:25:55,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:25:55,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:55,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:25:55,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:25:56,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:56,067 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-10 22:25:56,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:56,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:56,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:56,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:47 [2021-03-10 22:25:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:56,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:56,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 22:25:56,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749497426] [2021-03-10 22:25:56,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:25:56,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:25:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:25:56,269 INFO L87 Difference]: Start difference. First operand 845 states and 2006 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:25:58,194 INFO L93 Difference]: Finished difference Result 2249 states and 5506 transitions. [2021-03-10 22:25:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:25:58,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:25:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:25:58,200 INFO L225 Difference]: With dead ends: 2249 [2021-03-10 22:25:58,200 INFO L226 Difference]: Without dead ends: 2237 [2021-03-10 22:25:58,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1579.6ms TimeCoverageRelationStatistics Valid=367, Invalid=1355, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:25:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-03-10 22:25:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 870. [2021-03-10 22:25:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 2.384349827387802) internal successors, (2072), 869 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2072 transitions. [2021-03-10 22:25:58,220 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2072 transitions. Word has length 29 [2021-03-10 22:25:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:25:58,220 INFO L480 AbstractCegarLoop]: Abstraction has 870 states and 2072 transitions. [2021-03-10 22:25:58,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:25:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2072 transitions. [2021-03-10 22:25:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:25:58,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:25:58,222 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:25:58,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 22:25:58,444 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:25:58,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:25:58,444 INFO L82 PathProgramCache]: Analyzing trace with hash -110618394, now seen corresponding path program 27 times [2021-03-10 22:25:58,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:25:58,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920240153] [2021-03-10 22:25:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:25:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:25:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:58,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920240153] [2021-03-10 22:25:58,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228829808] [2021-03-10 22:25:58,798 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 [2021-03-10 22:25:58,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:25:58,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:25:58,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:25:58,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:25:59,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:59,031 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-10 22:25:59,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:25:59,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:25:59,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:25:59,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:38 [2021-03-10 22:25:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:25:59,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:25:59,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-03-10 22:25:59,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823023577] [2021-03-10 22:25:59,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:25:59,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:25:59,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:25:59,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:25:59,311 INFO L87 Difference]: Start difference. First operand 870 states and 2072 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:01,620 INFO L93 Difference]: Finished difference Result 2369 states and 5745 transitions. [2021-03-10 22:26:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:26:01,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:01,626 INFO L225 Difference]: With dead ends: 2369 [2021-03-10 22:26:01,626 INFO L226 Difference]: Without dead ends: 2348 [2021-03-10 22:26:01,627 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 2267.5ms TimeCoverageRelationStatistics Valid=651, Invalid=2655, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 22:26:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-03-10 22:26:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 865. [2021-03-10 22:26:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.3819444444444446) internal successors, (2058), 864 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2058 transitions. [2021-03-10 22:26:01,648 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2058 transitions. Word has length 29 [2021-03-10 22:26:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:01,649 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 2058 transitions. [2021-03-10 22:26:01,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2058 transitions. [2021-03-10 22:26:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:01,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:01,650 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:01,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 22:26:01,863 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:01,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1188955326, now seen corresponding path program 28 times [2021-03-10 22:26:01,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:01,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895227676] [2021-03-10 22:26:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895227676] [2021-03-10 22:26:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767690342] [2021-03-10 22:26:02,158 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 [2021-03-10 22:26:02,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:02,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:26:02,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:02,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:02,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:02,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-03-10 22:26:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:02,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 22:26:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275958830] [2021-03-10 22:26:02,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:26:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:26:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:26:02,389 INFO L87 Difference]: Start difference. First operand 865 states and 2058 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:03,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:03,837 INFO L93 Difference]: Finished difference Result 2135 states and 5176 transitions. [2021-03-10 22:26:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:26:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:03,841 INFO L225 Difference]: With dead ends: 2135 [2021-03-10 22:26:03,841 INFO L226 Difference]: Without dead ends: 2114 [2021-03-10 22:26:03,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1135.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:26:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-03-10 22:26:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 833. [2021-03-10 22:26:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.373798076923077) internal successors, (1975), 832 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1975 transitions. [2021-03-10 22:26:03,861 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1975 transitions. Word has length 29 [2021-03-10 22:26:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:03,861 INFO L480 AbstractCegarLoop]: Abstraction has 833 states and 1975 transitions. [2021-03-10 22:26:03,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1975 transitions. [2021-03-10 22:26:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:03,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:03,863 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:04,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:04,083 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1958681432, now seen corresponding path program 29 times [2021-03-10 22:26:04,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:04,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154074506] [2021-03-10 22:26:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:04,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154074506] [2021-03-10 22:26:04,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146959715] [2021-03-10 22:26:04,383 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 [2021-03-10 22:26:04,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:26:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:04,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:26:04,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:04,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:04,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:04,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:26:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:04,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:04,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 22:26:04,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334533351] [2021-03-10 22:26:04,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:26:04,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:04,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:26:04,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:26:04,617 INFO L87 Difference]: Start difference. First operand 833 states and 1975 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:06,359 INFO L93 Difference]: Finished difference Result 1995 states and 4831 transitions. [2021-03-10 22:26:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:26:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:06,362 INFO L225 Difference]: With dead ends: 1995 [2021-03-10 22:26:06,362 INFO L226 Difference]: Without dead ends: 1972 [2021-03-10 22:26:06,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1285.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:26:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-03-10 22:26:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 824. [2021-03-10 22:26:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-03-10 22:26:06,378 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-03-10 22:26:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:06,378 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-03-10 22:26:06,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-03-10 22:26:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:06,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:06,380 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:06,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:06,589 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1911744554, now seen corresponding path program 30 times [2021-03-10 22:26:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:06,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641118026] [2021-03-10 22:26:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:06,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641118026] [2021-03-10 22:26:06,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376873585] [2021-03-10 22:26:06,831 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 [2021-03-10 22:26:06,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:26:06,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:06,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:26:06,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:07,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:07,133 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 19 treesize of output 35 [2021-03-10 22:26:07,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:26:07,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:07,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:07,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:192 [2021-03-10 22:26:07,335 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-10 22:26:07,492 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:26:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:07,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:07,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 22:26:07,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351375313] [2021-03-10 22:26:07,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:26:07,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:07,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:26:07,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:26:07,541 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:08,603 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 22:26:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:09,608 INFO L93 Difference]: Finished difference Result 2137 states and 5234 transitions. [2021-03-10 22:26:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:26:09,613 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:09,617 INFO L225 Difference]: With dead ends: 2137 [2021-03-10 22:26:09,617 INFO L226 Difference]: Without dead ends: 2126 [2021-03-10 22:26:09,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1994.0ms TimeCoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 22:26:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-03-10 22:26:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 860. [2021-03-10 22:26:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.383003492433062) internal successors, (2047), 859 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2047 transitions. [2021-03-10 22:26:09,638 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2047 transitions. Word has length 29 [2021-03-10 22:26:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:09,639 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 2047 transitions. [2021-03-10 22:26:09,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2047 transitions. [2021-03-10 22:26:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:09,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:09,640 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:09,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-10 22:26:09,844 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash -626821692, now seen corresponding path program 31 times [2021-03-10 22:26:09,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:09,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340565250] [2021-03-10 22:26:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:10,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340565250] [2021-03-10 22:26:10,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150113173] [2021-03-10 22:26:10,110 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 [2021-03-10 22:26:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:10,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:10,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:10,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:26:10,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:10,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:10,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:10,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-03-10 22:26:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:10,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:10,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-03-10 22:26:10,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641820548] [2021-03-10 22:26:10,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:26:10,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:10,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:26:10,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:26:10,333 INFO L87 Difference]: Start difference. First operand 860 states and 2047 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:11,508 INFO L93 Difference]: Finished difference Result 2361 states and 5775 transitions. [2021-03-10 22:26:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:26:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-03-10 22:26:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:11,511 INFO L225 Difference]: With dead ends: 2361 [2021-03-10 22:26:11,511 INFO L226 Difference]: Without dead ends: 2341 [2021-03-10 22:26:11,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 865.2ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:26:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-03-10 22:26:11,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 878. [2021-03-10 22:26:11,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.3865450399087798) internal successors, (2093), 877 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2093 transitions. [2021-03-10 22:26:11,532 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2093 transitions. Word has length 29 [2021-03-10 22:26:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:11,532 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 2093 transitions. [2021-03-10 22:26:11,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2093 transitions. [2021-03-10 22:26:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:11,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:11,533 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:11,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:11,739 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:11,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2096805692, now seen corresponding path program 32 times [2021-03-10 22:26:11,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:11,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677904132] [2021-03-10 22:26:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:11,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677904132] [2021-03-10 22:26:11,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598347245] [2021-03-10 22:26:11,983 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 [2021-03-10 22:26:12,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:12,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:12,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:26:12,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:12,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:12,213 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-10 22:26:12,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:12,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:12,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:12,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-03-10 22:26:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:12,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:12,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 22:26:12,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210420513] [2021-03-10 22:26:12,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:26:12,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:26:12,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:26:12,357 INFO L87 Difference]: Start difference. First operand 878 states and 2093 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:14,245 INFO L93 Difference]: Finished difference Result 2298 states and 5548 transitions. [2021-03-10 22:26:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:26:14,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:14,249 INFO L225 Difference]: With dead ends: 2298 [2021-03-10 22:26:14,249 INFO L226 Difference]: Without dead ends: 2278 [2021-03-10 22:26:14,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1546.3ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:26:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-03-10 22:26:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 863. [2021-03-10 22:26:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.3816705336426915) internal successors, (2053), 862 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2053 transitions. [2021-03-10 22:26:14,270 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2053 transitions. Word has length 29 [2021-03-10 22:26:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:14,270 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 2053 transitions. [2021-03-10 22:26:14,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2053 transitions. [2021-03-10 22:26:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:14,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:14,272 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:14,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 22:26:14,495 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:14,496 INFO L82 PathProgramCache]: Analyzing trace with hash 783560668, now seen corresponding path program 33 times [2021-03-10 22:26:14,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:14,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305480066] [2021-03-10 22:26:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:14,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305480066] [2021-03-10 22:26:14,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095829059] [2021-03-10 22:26:14,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:14,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:26:14,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:14,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:26:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:15,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:26:15,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:15,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:15,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:15,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:26:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:15,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:15,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-03-10 22:26:15,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218372494] [2021-03-10 22:26:15,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:26:15,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:15,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:26:15,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:26:15,076 INFO L87 Difference]: Start difference. First operand 863 states and 2053 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:16,217 INFO L93 Difference]: Finished difference Result 2024 states and 4904 transitions. [2021-03-10 22:26:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:26:16,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:16,221 INFO L225 Difference]: With dead ends: 2024 [2021-03-10 22:26:16,221 INFO L226 Difference]: Without dead ends: 2014 [2021-03-10 22:26:16,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 796.6ms TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:26:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-03-10 22:26:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 860. [2021-03-10 22:26:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.3818393480791618) internal successors, (2046), 859 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2046 transitions. [2021-03-10 22:26:16,241 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2046 transitions. Word has length 29 [2021-03-10 22:26:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:16,241 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 2046 transitions. [2021-03-10 22:26:16,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2046 transitions. [2021-03-10 22:26:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:16,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:16,243 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:16,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:16,447 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:16,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1396239190, now seen corresponding path program 34 times [2021-03-10 22:26:16,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:16,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210212956] [2021-03-10 22:26:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:16,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210212956] [2021-03-10 22:26:16,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497263080] [2021-03-10 22:26:16,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:16,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:16,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:16,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:16,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:26:16,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:16,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:16,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:16,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-03-10 22:26:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:16,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:16,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-03-10 22:26:16,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621329252] [2021-03-10 22:26:16,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:26:16,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:26:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:26:16,913 INFO L87 Difference]: Start difference. First operand 860 states and 2046 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:18,154 INFO L93 Difference]: Finished difference Result 2251 states and 5520 transitions. [2021-03-10 22:26:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:26:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-03-10 22:26:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:18,157 INFO L225 Difference]: With dead ends: 2251 [2021-03-10 22:26:18,157 INFO L226 Difference]: Without dead ends: 2236 [2021-03-10 22:26:18,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 811.8ms TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:26:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-03-10 22:26:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 844. [2021-03-10 22:26:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.377224199288256) internal successors, (2004), 843 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2004 transitions. [2021-03-10 22:26:18,171 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2004 transitions. Word has length 29 [2021-03-10 22:26:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:18,171 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 2004 transitions. [2021-03-10 22:26:18,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2004 transitions. [2021-03-10 22:26:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:18,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:18,172 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:18,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:18,373 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1211178052, now seen corresponding path program 35 times [2021-03-10 22:26:18,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:18,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031839604] [2021-03-10 22:26:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:18,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031839604] [2021-03-10 22:26:18,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028647314] [2021-03-10 22:26:18,661 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) [2021-03-10 22:26:18,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:26:18,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:18,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:18,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:18,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:26:18,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:18,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:18,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:18,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:26:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:18,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:18,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 22:26:18,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670720797] [2021-03-10 22:26:18,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:26:18,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:18,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:26:18,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:26:18,919 INFO L87 Difference]: Start difference. First operand 844 states and 2004 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:20,391 INFO L93 Difference]: Finished difference Result 2149 states and 5171 transitions. [2021-03-10 22:26:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:26:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:20,394 INFO L225 Difference]: With dead ends: 2149 [2021-03-10 22:26:20,394 INFO L226 Difference]: Without dead ends: 2126 [2021-03-10 22:26:20,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:26:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-03-10 22:26:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 824. [2021-03-10 22:26:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-03-10 22:26:20,407 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-03-10 22:26:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:20,407 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-03-10 22:26:20,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-03-10 22:26:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:20,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:20,408 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:20,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 22:26:20,609 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2108871402, now seen corresponding path program 36 times [2021-03-10 22:26:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:20,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531468951] [2021-03-10 22:26:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:20,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531468951] [2021-03-10 22:26:20,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852595460] [2021-03-10 22:26:20,877 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 [2021-03-10 22:26:20,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:26:20,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:20,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:26:21,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 22:26:21,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:21,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:21,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:21,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-03-10 22:26:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:21,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:21,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-10 22:26:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129334305] [2021-03-10 22:26:21,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:26:21,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:26:21,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:26:21,146 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:22,487 INFO L93 Difference]: Finished difference Result 2144 states and 5261 transitions. [2021-03-10 22:26:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:26:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:22,490 INFO L225 Difference]: With dead ends: 2144 [2021-03-10 22:26:22,490 INFO L226 Difference]: Without dead ends: 2135 [2021-03-10 22:26:22,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 918.3ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:26:22,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-03-10 22:26:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 846. [2021-03-10 22:26:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3775147928994085) internal successors, (2009), 845 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2009 transitions. [2021-03-10 22:26:22,506 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2009 transitions. Word has length 29 [2021-03-10 22:26:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:22,506 INFO L480 AbstractCegarLoop]: Abstraction has 846 states and 2009 transitions. [2021-03-10 22:26:22,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2009 transitions. [2021-03-10 22:26:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:22,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:22,508 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:22,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:22,729 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:22,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1835199664, now seen corresponding path program 37 times [2021-03-10 22:26:22,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:22,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108441529] [2021-03-10 22:26:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:23,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108441529] [2021-03-10 22:26:23,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139103566] [2021-03-10 22:26:23,011 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 [2021-03-10 22:26:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:23,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:26:23,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:26:23,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:23,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:23,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:23,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:26:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:23,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:23,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:26:23,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137416741] [2021-03-10 22:26:23,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:26:23,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:26:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:26:23,245 INFO L87 Difference]: Start difference. First operand 846 states and 2009 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:24,422 INFO L93 Difference]: Finished difference Result 2161 states and 5322 transitions. [2021-03-10 22:26:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:26:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:24,425 INFO L225 Difference]: With dead ends: 2161 [2021-03-10 22:26:24,425 INFO L226 Difference]: Without dead ends: 2150 [2021-03-10 22:26:24,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:26:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-03-10 22:26:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 858. [2021-03-10 22:26:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-03-10 22:26:24,438 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-03-10 22:26:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:24,438 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-03-10 22:26:24,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-03-10 22:26:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:24,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:24,439 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:24,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:24,643 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1169996496, now seen corresponding path program 38 times [2021-03-10 22:26:24,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:24,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755650156] [2021-03-10 22:26:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:24,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755650156] [2021-03-10 22:26:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741368560] [2021-03-10 22:26:24,953 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 [2021-03-10 22:26:24,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:24,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:24,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:24,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:25,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:26:25,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:25,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:25,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:25,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:26:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:25,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:25,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:26:25,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972465305] [2021-03-10 22:26:25,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:26:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:25,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:26:25,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:26:25,168 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:26,021 INFO L93 Difference]: Finished difference Result 2231 states and 5485 transitions. [2021-03-10 22:26:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:26:26,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:26,024 INFO L225 Difference]: With dead ends: 2231 [2021-03-10 22:26:26,024 INFO L226 Difference]: Without dead ends: 2211 [2021-03-10 22:26:26,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 808.7ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:26:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-03-10 22:26:26,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 837. [2021-03-10 22:26:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.374401913875598) internal successors, (1985), 836 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1985 transitions. [2021-03-10 22:26:26,038 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1985 transitions. Word has length 29 [2021-03-10 22:26:26,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:26,038 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1985 transitions. [2021-03-10 22:26:26,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1985 transitions. [2021-03-10 22:26:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:26,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:26,039 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:26,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:26,240 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:26,240 INFO L82 PathProgramCache]: Analyzing trace with hash -476095038, now seen corresponding path program 39 times [2021-03-10 22:26:26,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:26,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385851150] [2021-03-10 22:26:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:26,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385851150] [2021-03-10 22:26:26,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600829810] [2021-03-10 22:26:26,547 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 [2021-03-10 22:26:26,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:26:26,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:26,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:26:26,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:26,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:26:26,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:26:26,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:26,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:26,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:26,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:15 [2021-03-10 22:26:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:26,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:26,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-03-10 22:26:26,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651184344] [2021-03-10 22:26:26,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:26:26,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:26,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:26:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:26:26,843 INFO L87 Difference]: Start difference. First operand 837 states and 1985 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:28,248 INFO L93 Difference]: Finished difference Result 2169 states and 5328 transitions. [2021-03-10 22:26:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:26:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:28,251 INFO L225 Difference]: With dead ends: 2169 [2021-03-10 22:26:28,251 INFO L226 Difference]: Without dead ends: 2158 [2021-03-10 22:26:28,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1101.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:26:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-03-10 22:26:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 858. [2021-03-10 22:26:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-03-10 22:26:28,265 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-03-10 22:26:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:28,265 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-03-10 22:26:28,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-03-10 22:26:28,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:28,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:28,267 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:28,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 22:26:28,487 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1280306012, now seen corresponding path program 40 times [2021-03-10 22:26:28,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:28,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984282579] [2021-03-10 22:26:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:28,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984282579] [2021-03-10 22:26:28,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838227030] [2021-03-10 22:26:28,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:28,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:28,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:28,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:28,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:26:29,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:26:29,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:29,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:29,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:29,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:26:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:29,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:29,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:26:29,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501867955] [2021-03-10 22:26:29,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:26:29,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:26:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:26:29,071 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:30,220 INFO L93 Difference]: Finished difference Result 2228 states and 5468 transitions. [2021-03-10 22:26:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:26:30,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:30,223 INFO L225 Difference]: With dead ends: 2228 [2021-03-10 22:26:30,223 INFO L226 Difference]: Without dead ends: 2208 [2021-03-10 22:26:30,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1042.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:26:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-03-10 22:26:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 846. [2021-03-10 22:26:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3763313609467454) internal successors, (2008), 845 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2008 transitions. [2021-03-10 22:26:30,245 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2008 transitions. Word has length 29 [2021-03-10 22:26:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:30,245 INFO L480 AbstractCegarLoop]: Abstraction has 846 states and 2008 transitions. [2021-03-10 22:26:30,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2008 transitions. [2021-03-10 22:26:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:30,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:30,246 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:30,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:30,468 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:30,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1485707216, now seen corresponding path program 41 times [2021-03-10 22:26:30,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:30,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92453774] [2021-03-10 22:26:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:30,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92453774] [2021-03-10 22:26:30,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598068190] [2021-03-10 22:26:30,747 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 [2021-03-10 22:26:30,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:26:30,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:30,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:26:30,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:30,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:30,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:30,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:26:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:30,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:30,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:26:30,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501483492] [2021-03-10 22:26:30,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:26:30,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:26:30,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:26:30,976 INFO L87 Difference]: Start difference. First operand 846 states and 2008 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:32,604 INFO L93 Difference]: Finished difference Result 1958 states and 4753 transitions. [2021-03-10 22:26:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:26:32,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:26:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:32,607 INFO L225 Difference]: With dead ends: 1958 [2021-03-10 22:26:32,607 INFO L226 Difference]: Without dead ends: 1935 [2021-03-10 22:26:32,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:26:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-03-10 22:26:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 828. [2021-03-10 22:26:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.3712212817412333) internal successors, (1961), 827 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1961 transitions. [2021-03-10 22:26:32,619 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1961 transitions. Word has length 29 [2021-03-10 22:26:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:32,619 INFO L480 AbstractCegarLoop]: Abstraction has 828 states and 1961 transitions. [2021-03-10 22:26:32,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1961 transitions. [2021-03-10 22:26:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:32,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:32,620 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:32,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:32,821 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1983699818, now seen corresponding path program 42 times [2021-03-10 22:26:32,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:32,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464330966] [2021-03-10 22:26:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:33,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464330966] [2021-03-10 22:26:33,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411908843] [2021-03-10 22:26:33,105 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 [2021-03-10 22:26:33,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:26:33,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:33,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:26:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:33,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:33,443 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 21 treesize of output 37 [2021-03-10 22:26:33,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:26:33,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:33,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:33,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:133 [2021-03-10 22:26:33,645 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:26:33,901 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 22:26:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:33,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:33,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-03-10 22:26:33,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755562186] [2021-03-10 22:26:33,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:26:33,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:33,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:26:33,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:26:33,948 INFO L87 Difference]: Start difference. First operand 828 states and 1961 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:35,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:35,968 INFO L93 Difference]: Finished difference Result 2172 states and 5333 transitions. [2021-03-10 22:26:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:26:35,969 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:35,972 INFO L225 Difference]: With dead ends: 2172 [2021-03-10 22:26:35,972 INFO L226 Difference]: Without dead ends: 2161 [2021-03-10 22:26:35,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2058.4ms TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:26:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-03-10 22:26:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 868. [2021-03-10 22:26:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.381776239907728) internal successors, (2065), 867 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2065 transitions. [2021-03-10 22:26:35,985 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2065 transitions. Word has length 29 [2021-03-10 22:26:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:35,986 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 2065 transitions. [2021-03-10 22:26:35,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2065 transitions. [2021-03-10 22:26:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:35,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:35,988 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:36,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:36,203 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:36,204 INFO L82 PathProgramCache]: Analyzing trace with hash -227298768, now seen corresponding path program 43 times [2021-03-10 22:26:36,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:36,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98653893] [2021-03-10 22:26:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:36,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98653893] [2021-03-10 22:26:36,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901791713] [2021-03-10 22:26:36,444 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 [2021-03-10 22:26:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:36,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:26:36,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:36,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:36,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:36,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:26:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:36,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:36,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:26:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065624610] [2021-03-10 22:26:36,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:26:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:26:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:26:36,667 INFO L87 Difference]: Start difference. First operand 868 states and 2065 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:37,797 INFO L93 Difference]: Finished difference Result 2398 states and 5869 transitions. [2021-03-10 22:26:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:26:37,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:37,801 INFO L225 Difference]: With dead ends: 2398 [2021-03-10 22:26:37,801 INFO L226 Difference]: Without dead ends: 2378 [2021-03-10 22:26:37,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 943.6ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:26:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-03-10 22:26:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 858. [2021-03-10 22:26:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.3745624270711785) internal successors, (2035), 857 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2035 transitions. [2021-03-10 22:26:37,823 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2035 transitions. Word has length 29 [2021-03-10 22:26:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:37,823 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2035 transitions. [2021-03-10 22:26:37,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2035 transitions. [2021-03-10 22:26:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:37,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:37,825 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:38,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:38,039 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1798638680, now seen corresponding path program 44 times [2021-03-10 22:26:38,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:38,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783692424] [2021-03-10 22:26:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:38,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783692424] [2021-03-10 22:26:38,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281944535] [2021-03-10 22:26:38,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:38,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:38,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:38,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:26:38,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:26:38,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:38,598 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-03-10 22:26:38,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:26:38,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:38,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:38,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-03-10 22:26:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:38,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:38,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:26:38,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226534171] [2021-03-10 22:26:38,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:26:38,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:26:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:26:38,816 INFO L87 Difference]: Start difference. First operand 858 states and 2035 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:40,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:40,313 INFO L93 Difference]: Finished difference Result 2184 states and 5285 transitions. [2021-03-10 22:26:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:26:40,314 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 29 [2021-03-10 22:26:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:40,316 INFO L225 Difference]: With dead ends: 2184 [2021-03-10 22:26:40,316 INFO L226 Difference]: Without dead ends: 2164 [2021-03-10 22:26:40,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1286.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:26:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-03-10 22:26:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 843. [2021-03-10 22:26:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.369358669833729) internal successors, (1995), 842 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1995 transitions. [2021-03-10 22:26:40,332 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1995 transitions. Word has length 29 [2021-03-10 22:26:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:40,332 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 1995 transitions. [2021-03-10 22:26:40,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1995 transitions. [2021-03-10 22:26:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:40,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:40,333 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:40,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-03-10 22:26:40,535 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:40,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1183083592, now seen corresponding path program 45 times [2021-03-10 22:26:40,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:40,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177066227] [2021-03-10 22:26:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:40,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177066227] [2021-03-10 22:26:40,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407819557] [2021-03-10 22:26:40,820 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 [2021-03-10 22:26:40,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:26:40,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:40,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:26:40,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:41,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:26:41,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 22:26:41,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:41,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:41,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:41,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-03-10 22:26:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:41,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:41,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-03-10 22:26:41,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966256282] [2021-03-10 22:26:41,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:26:41,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:41,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:26:41,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:26:41,115 INFO L87 Difference]: Start difference. First operand 843 states and 1995 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:42,033 INFO L93 Difference]: Finished difference Result 1963 states and 4750 transitions. [2021-03-10 22:26:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:26:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:42,036 INFO L225 Difference]: With dead ends: 1963 [2021-03-10 22:26:42,036 INFO L226 Difference]: Without dead ends: 1953 [2021-03-10 22:26:42,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 794.1ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:26:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-03-10 22:26:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 837. [2021-03-10 22:26:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.3696172248803826) internal successors, (1981), 836 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1981 transitions. [2021-03-10 22:26:42,048 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1981 transitions. Word has length 29 [2021-03-10 22:26:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:42,048 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1981 transitions. [2021-03-10 22:26:42,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1981 transitions. [2021-03-10 22:26:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:42,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:42,049 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:42,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:42,250 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:42,251 INFO L82 PathProgramCache]: Analyzing trace with hash -644766292, now seen corresponding path program 46 times [2021-03-10 22:26:42,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:42,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423640615] [2021-03-10 22:26:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:42,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423640615] [2021-03-10 22:26:42,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482148238] [2021-03-10 22:26:42,606 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 [2021-03-10 22:26:42,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:42,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:42,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:42,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:42,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:26:42,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:42,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:42,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:42,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:26:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:42,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:42,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:26:42,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310485023] [2021-03-10 22:26:42,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:26:42,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:42,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:26:42,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:26:42,924 INFO L87 Difference]: Start difference. First operand 837 states and 1981 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:44,760 INFO L93 Difference]: Finished difference Result 2002 states and 4888 transitions. [2021-03-10 22:26:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:26:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:44,763 INFO L225 Difference]: With dead ends: 2002 [2021-03-10 22:26:44,763 INFO L226 Difference]: Without dead ends: 1985 [2021-03-10 22:26:44,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1416.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:26:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-03-10 22:26:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 858. [2021-03-10 22:26:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.371061843640607) internal successors, (2032), 857 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2032 transitions. [2021-03-10 22:26:44,775 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2032 transitions. Word has length 29 [2021-03-10 22:26:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:44,775 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2032 transitions. [2021-03-10 22:26:44,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2032 transitions. [2021-03-10 22:26:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:44,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:44,776 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:44,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 22:26:44,977 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:44,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash -371094554, now seen corresponding path program 47 times [2021-03-10 22:26:44,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:44,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284135735] [2021-03-10 22:26:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:45,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284135735] [2021-03-10 22:26:45,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861631341] [2021-03-10 22:26:45,280 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 [2021-03-10 22:26:45,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:26:45,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:45,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:45,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:45,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:26:45,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:26:45,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:45,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:45,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:45,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:26:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:45,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:45,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:26:45,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700177989] [2021-03-10 22:26:45,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:26:45,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:26:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:26:45,541 INFO L87 Difference]: Start difference. First operand 858 states and 2032 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:47,785 INFO L93 Difference]: Finished difference Result 2515 states and 6171 transitions. [2021-03-10 22:26:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:26:47,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:26:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:47,789 INFO L225 Difference]: With dead ends: 2515 [2021-03-10 22:26:47,789 INFO L226 Difference]: Without dead ends: 2500 [2021-03-10 22:26:47,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1741.4ms TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:26:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-03-10 22:26:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 867. [2021-03-10 22:26:47,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.3729792147806004) internal successors, (2055), 866 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2055 transitions. [2021-03-10 22:26:47,804 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2055 transitions. Word has length 29 [2021-03-10 22:26:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:47,805 INFO L480 AbstractCegarLoop]: Abstraction has 867 states and 2055 transitions. [2021-03-10 22:26:47,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2055 transitions. [2021-03-10 22:26:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:47,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:47,806 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:48,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 22:26:48,006 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 294108614, now seen corresponding path program 48 times [2021-03-10 22:26:48,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:48,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223136953] [2021-03-10 22:26:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:48,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223136953] [2021-03-10 22:26:48,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477400025] [2021-03-10 22:26:48,343 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) [2021-03-10 22:26:48,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:26:48,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:48,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:26:48,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:48,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:48,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:48,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:26:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:48,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:48,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:26:48,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096095859] [2021-03-10 22:26:48,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:26:48,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:48,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:26:48,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:26:48,605 INFO L87 Difference]: Start difference. First operand 867 states and 2055 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:50,422 INFO L93 Difference]: Finished difference Result 2120 states and 5191 transitions. [2021-03-10 22:26:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:26:50,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:50,425 INFO L225 Difference]: With dead ends: 2120 [2021-03-10 22:26:50,425 INFO L226 Difference]: Without dead ends: 2101 [2021-03-10 22:26:50,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1329.7ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:26:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-03-10 22:26:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 859. [2021-03-10 22:26:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.3729603729603728) internal successors, (2036), 858 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2036 transitions. [2021-03-10 22:26:50,438 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2036 transitions. Word has length 29 [2021-03-10 22:26:50,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:50,438 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2036 transitions. [2021-03-10 22:26:50,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:50,438 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2036 transitions. [2021-03-10 22:26:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:50,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:50,439 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:50,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:50,640 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1194528790, now seen corresponding path program 49 times [2021-03-10 22:26:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:50,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733582393] [2021-03-10 22:26:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:50,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733582393] [2021-03-10 22:26:50,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793913299] [2021-03-10 22:26:50,940 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) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:50,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:51,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:26:51,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:51,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:51,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:51,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:26:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:51,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:51,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:26:51,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377840172] [2021-03-10 22:26:51,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:26:51,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:51,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:26:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:26:51,154 INFO L87 Difference]: Start difference. First operand 859 states and 2036 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:52,335 INFO L93 Difference]: Finished difference Result 2618 states and 6519 transitions. [2021-03-10 22:26:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:26:52,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:52,338 INFO L225 Difference]: With dead ends: 2618 [2021-03-10 22:26:52,338 INFO L226 Difference]: Without dead ends: 2605 [2021-03-10 22:26:52,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1097.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:26:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-03-10 22:26:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 872. [2021-03-10 22:26:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.377726750861079) internal successors, (2071), 871 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2071 transitions. [2021-03-10 22:26:52,353 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2071 transitions. Word has length 29 [2021-03-10 22:26:52,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:52,353 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2071 transitions. [2021-03-10 22:26:52,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2071 transitions. [2021-03-10 22:26:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:52,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:52,354 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:52,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 22:26:52,554 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1344037456, now seen corresponding path program 50 times [2021-03-10 22:26:52,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:52,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872156811] [2021-03-10 22:26:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:52,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872156811] [2021-03-10 22:26:52,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26933426] [2021-03-10 22:26:52,866 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 [2021-03-10 22:26:52,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:52,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:52,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:53,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:26:53,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:26:53,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:53,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:53,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:26:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:53,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:53,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:26:53,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512224241] [2021-03-10 22:26:53,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:26:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:26:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:26:53,103 INFO L87 Difference]: Start difference. First operand 872 states and 2071 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:54,559 INFO L93 Difference]: Finished difference Result 2318 states and 5736 transitions. [2021-03-10 22:26:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:26:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:26:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:54,562 INFO L225 Difference]: With dead ends: 2318 [2021-03-10 22:26:54,562 INFO L226 Difference]: Without dead ends: 2301 [2021-03-10 22:26:54,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1115.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:26:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-03-10 22:26:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 860. [2021-03-10 22:26:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.377182770663562) internal successors, (2042), 859 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2042 transitions. [2021-03-10 22:26:54,575 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2042 transitions. Word has length 29 [2021-03-10 22:26:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:54,575 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 2042 transitions. [2021-03-10 22:26:54,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2042 transitions. [2021-03-10 22:26:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:54,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:54,577 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:54,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 22:26:54,777 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:54,778 INFO L82 PathProgramCache]: Analyzing trace with hash 184916612, now seen corresponding path program 51 times [2021-03-10 22:26:54,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:54,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796358003] [2021-03-10 22:26:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:55,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796358003] [2021-03-10 22:26:55,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614218585] [2021-03-10 22:26:55,096 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) [2021-03-10 22:26:55,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:26:55,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:55,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:26:55,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:55,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:55,477 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 23 treesize of output 39 [2021-03-10 22:26:55,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:26:55,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:26:55,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:26:55,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:130 [2021-03-10 22:26:55,851 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 22:26:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:55,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:55,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 22:26:55,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335737125] [2021-03-10 22:26:55,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:26:55,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:26:55,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:26:55,890 INFO L87 Difference]: Start difference. First operand 860 states and 2042 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:59,431 INFO L93 Difference]: Finished difference Result 2092 states and 5108 transitions. [2021-03-10 22:26:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 22:26:59,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 29 [2021-03-10 22:26:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:59,435 INFO L225 Difference]: With dead ends: 2092 [2021-03-10 22:26:59,435 INFO L226 Difference]: Without dead ends: 2079 [2021-03-10 22:26:59,435 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2957.1ms TimeCoverageRelationStatistics Valid=462, Invalid=3320, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 22:26:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-03-10 22:26:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 864. [2021-03-10 22:26:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.3800695249130936) internal successors, (2054), 863 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2054 transitions. [2021-03-10 22:26:59,449 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2054 transitions. Word has length 29 [2021-03-10 22:26:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:59,449 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2054 transitions. [2021-03-10 22:26:59,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2054 transitions. [2021-03-10 22:26:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:26:59,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:59,450 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:59,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-03-10 22:26:59,651 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash -586222012, now seen corresponding path program 52 times [2021-03-10 22:26:59,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:59,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179294129] [2021-03-10 22:26:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:59,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179294129] [2021-03-10 22:26:59,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687708288] [2021-03-10 22:26:59,908 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 [2021-03-10 22:26:59,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:26:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:00,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:00,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:00,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:00,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:00,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:27:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:00,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:00,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-10 22:27:00,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389763528] [2021-03-10 22:27:00,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:27:00,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:27:00,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:27:00,170 INFO L87 Difference]: Start difference. First operand 864 states and 2054 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:01,739 INFO L93 Difference]: Finished difference Result 2146 states and 5242 transitions. [2021-03-10 22:27:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:27:01,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:01,743 INFO L225 Difference]: With dead ends: 2146 [2021-03-10 22:27:01,743 INFO L226 Difference]: Without dead ends: 2136 [2021-03-10 22:27:01,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 973.6ms TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:27:01,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-03-10 22:27:01,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 857. [2021-03-10 22:27:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.3773364485981308) internal successors, (2035), 856 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2035 transitions. [2021-03-10 22:27:01,756 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2035 transitions. Word has length 29 [2021-03-10 22:27:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:01,756 INFO L480 AbstractCegarLoop]: Abstraction has 857 states and 2035 transitions. [2021-03-10 22:27:01,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2035 transitions. [2021-03-10 22:27:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:01,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:01,757 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:01,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:01,958 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:01,958 INFO L82 PathProgramCache]: Analyzing trace with hash -989153706, now seen corresponding path program 53 times [2021-03-10 22:27:01,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:01,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437312234] [2021-03-10 22:27:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:02,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437312234] [2021-03-10 22:27:02,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323430107] [2021-03-10 22:27:02,230 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 [2021-03-10 22:27:02,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:27:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:02,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:02,549 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-03-10 22:27:02,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-03-10 22:27:02,553 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:02,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:02,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:02,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-03-10 22:27:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:02,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:02,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:02,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150490620] [2021-03-10 22:27:02,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:02,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:02,596 INFO L87 Difference]: Start difference. First operand 857 states and 2035 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:04,726 INFO L93 Difference]: Finished difference Result 2191 states and 5325 transitions. [2021-03-10 22:27:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:27:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:04,729 INFO L225 Difference]: With dead ends: 2191 [2021-03-10 22:27:04,729 INFO L226 Difference]: Without dead ends: 2174 [2021-03-10 22:27:04,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1422.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:27:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-03-10 22:27:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 875. [2021-03-10 22:27:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3821510297482837) internal successors, (2082), 874 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2082 transitions. [2021-03-10 22:27:04,741 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2082 transitions. Word has length 29 [2021-03-10 22:27:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:04,741 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 2082 transitions. [2021-03-10 22:27:04,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2082 transitions. [2021-03-10 22:27:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:04,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:04,743 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:04,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:04,943 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash -715481968, now seen corresponding path program 54 times [2021-03-10 22:27:04,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:04,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793738888] [2021-03-10 22:27:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:05,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793738888] [2021-03-10 22:27:05,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298718352] [2021-03-10 22:27:05,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:05,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:27:05,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:05,440 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-03-10 22:27:05,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 62 [2021-03-10 22:27:05,443 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:05,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:05,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:05,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:96, output treesize:10 [2021-03-10 22:27:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:05,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:05,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:05,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274068816] [2021-03-10 22:27:05,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:05,508 INFO L87 Difference]: Start difference. First operand 875 states and 2082 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:07,662 INFO L93 Difference]: Finished difference Result 2635 states and 6476 transitions. [2021-03-10 22:27:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:27:07,664 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:27:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:07,667 INFO L225 Difference]: With dead ends: 2635 [2021-03-10 22:27:07,667 INFO L226 Difference]: Without dead ends: 2622 [2021-03-10 22:27:07,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1821.6ms TimeCoverageRelationStatistics Valid=481, Invalid=2069, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:27:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-03-10 22:27:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 891. [2021-03-10 22:27:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.385393258426966) internal successors, (2123), 890 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2123 transitions. [2021-03-10 22:27:07,681 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2123 transitions. Word has length 29 [2021-03-10 22:27:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:07,681 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 2123 transitions. [2021-03-10 22:27:07,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2123 transitions. [2021-03-10 22:27:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:07,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:07,683 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:07,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 22:27:07,883 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:07,884 INFO L82 PathProgramCache]: Analyzing trace with hash -50278800, now seen corresponding path program 55 times [2021-03-10 22:27:07,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:07,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034163338] [2021-03-10 22:27:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:08,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034163338] [2021-03-10 22:27:08,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496585951] [2021-03-10 22:27:08,200 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 [2021-03-10 22:27:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:08,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:08,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:27:08,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:08,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:08,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:08,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:27:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:08,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:08,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:27:08,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787812581] [2021-03-10 22:27:08,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:27:08,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:27:08,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:27:08,437 INFO L87 Difference]: Start difference. First operand 891 states and 2123 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:09,947 INFO L93 Difference]: Finished difference Result 2228 states and 5467 transitions. [2021-03-10 22:27:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:27:09,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:09,951 INFO L225 Difference]: With dead ends: 2228 [2021-03-10 22:27:09,951 INFO L226 Difference]: Without dead ends: 2210 [2021-03-10 22:27:09,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1102.8ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:27:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-03-10 22:27:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 864. [2021-03-10 22:27:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.381228273464658) internal successors, (2055), 863 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2055 transitions. [2021-03-10 22:27:09,969 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2055 transitions. Word has length 29 [2021-03-10 22:27:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:09,969 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2055 transitions. [2021-03-10 22:27:09,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2055 transitions. [2021-03-10 22:27:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:09,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:09,971 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:10,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:10,193 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:10,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1301042010, now seen corresponding path program 56 times [2021-03-10 22:27:10,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:10,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682054836] [2021-03-10 22:27:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:10,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682054836] [2021-03-10 22:27:10,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342105444] [2021-03-10 22:27:10,495 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) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:10,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:10,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:10,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:10,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:10,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:10,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:10,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:10,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:27:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:10,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:10,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907608295] [2021-03-10 22:27:10,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:10,820 INFO L87 Difference]: Start difference. First operand 864 states and 2055 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:11,964 INFO L93 Difference]: Finished difference Result 2015 states and 4908 transitions. [2021-03-10 22:27:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:27:11,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:11,967 INFO L225 Difference]: With dead ends: 2015 [2021-03-10 22:27:11,967 INFO L226 Difference]: Without dead ends: 2006 [2021-03-10 22:27:11,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 978.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:27:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-03-10 22:27:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 866. [2021-03-10 22:27:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.3791907514450865) internal successors, (2058), 865 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2058 transitions. [2021-03-10 22:27:11,980 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2058 transitions. Word has length 29 [2021-03-10 22:27:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:11,980 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 2058 transitions. [2021-03-10 22:27:11,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2058 transitions. [2021-03-10 22:27:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:11,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:11,981 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:12,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 22:27:12,182 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:12,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:12,182 INFO L82 PathProgramCache]: Analyzing trace with hash 880815196, now seen corresponding path program 57 times [2021-03-10 22:27:12,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:12,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021764488] [2021-03-10 22:27:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:12,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021764488] [2021-03-10 22:27:12,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595038360] [2021-03-10 22:27:12,484 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) [2021-03-10 22:27:12,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:27:12,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:12,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:27:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:12,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:12,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:12,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:12,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:12,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:27:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:12,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:12,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-03-10 22:27:12,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870499045] [2021-03-10 22:27:12,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:27:12,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:12,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:27:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:27:12,808 INFO L87 Difference]: Start difference. First operand 866 states and 2058 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:14,042 INFO L93 Difference]: Finished difference Result 2129 states and 5184 transitions. [2021-03-10 22:27:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:27:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:14,045 INFO L225 Difference]: With dead ends: 2129 [2021-03-10 22:27:14,045 INFO L226 Difference]: Without dead ends: 2120 [2021-03-10 22:27:14,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:27:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-03-10 22:27:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 902. [2021-03-10 22:27:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-03-10 22:27:14,058 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-03-10 22:27:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:14,058 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-03-10 22:27:14,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-03-10 22:27:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:14,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:14,060 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:14,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:14,280 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash 591087582, now seen corresponding path program 58 times [2021-03-10 22:27:14,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:14,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427462963] [2021-03-10 22:27:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:14,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427462963] [2021-03-10 22:27:14,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956333200] [2021-03-10 22:27:14,618 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) [2021-03-10 22:27:14,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:27:14,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:14,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 22:27:14,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:14,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:14,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:14,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-03-10 22:27:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:14,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:14,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:14,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217180040] [2021-03-10 22:27:14,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:14,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:14,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:14,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:14,905 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:16,284 INFO L93 Difference]: Finished difference Result 2272 states and 5520 transitions. [2021-03-10 22:27:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:27:16,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:16,287 INFO L225 Difference]: With dead ends: 2272 [2021-03-10 22:27:16,287 INFO L226 Difference]: Without dead ends: 2255 [2021-03-10 22:27:16,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1043.0ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:27:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-03-10 22:27:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 920. [2021-03-10 22:27:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.381936887921654) internal successors, (2189), 919 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2189 transitions. [2021-03-10 22:27:16,300 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2189 transitions. Word has length 29 [2021-03-10 22:27:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:16,301 INFO L480 AbstractCegarLoop]: Abstraction has 920 states and 2189 transitions. [2021-03-10 22:27:16,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2189 transitions. [2021-03-10 22:27:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:16,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:16,302 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:16,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-03-10 22:27:16,515 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:16,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1810375108, now seen corresponding path program 59 times [2021-03-10 22:27:16,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:16,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579888648] [2021-03-10 22:27:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:16,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579888648] [2021-03-10 22:27:16,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152273249] [2021-03-10 22:27:16,789 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) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:16,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:27:16,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:16,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:27:16,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:16,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:16,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:16,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:27:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:17,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:17,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:17,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139583931] [2021-03-10 22:27:17,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:17,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:17,053 INFO L87 Difference]: Start difference. First operand 920 states and 2189 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:18,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:18,559 INFO L93 Difference]: Finished difference Result 2706 states and 6630 transitions. [2021-03-10 22:27:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:27:18,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:27:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:18,562 INFO L225 Difference]: With dead ends: 2706 [2021-03-10 22:27:18,562 INFO L226 Difference]: Without dead ends: 2693 [2021-03-10 22:27:18,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1221.0ms TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:27:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-10 22:27:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 936. [2021-03-10 22:27:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 2.3850267379679146) internal successors, (2230), 935 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2230 transitions. [2021-03-10 22:27:18,582 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2230 transitions. Word has length 29 [2021-03-10 22:27:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:18,582 INFO L480 AbstractCegarLoop]: Abstraction has 936 states and 2230 transitions. [2021-03-10 22:27:18,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2230 transitions. [2021-03-10 22:27:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:18,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:18,584 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:18,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:18,805 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1145171940, now seen corresponding path program 60 times [2021-03-10 22:27:18,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:18,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179275342] [2021-03-10 22:27:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:19,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179275342] [2021-03-10 22:27:19,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371132619] [2021-03-10 22:27:19,049 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 [2021-03-10 22:27:19,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:27:19,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:19,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:27:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:19,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:19,358 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 21 treesize of output 37 [2021-03-10 22:27:19,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:27:19,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:19,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:19,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:244 [2021-03-10 22:27:19,573 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-03-10 22:27:19,737 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 22:27:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:19,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:19,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-03-10 22:27:19,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306725761] [2021-03-10 22:27:19,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:27:19,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:27:19,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:27:19,780 INFO L87 Difference]: Start difference. First operand 936 states and 2230 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:21,440 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 22:27:21,824 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:27:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:22,229 INFO L93 Difference]: Finished difference Result 2169 states and 5302 transitions. [2021-03-10 22:27:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:27:22,229 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:22,232 INFO L225 Difference]: With dead ends: 2169 [2021-03-10 22:27:22,232 INFO L226 Difference]: Without dead ends: 2150 [2021-03-10 22:27:22,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2129.5ms TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:27:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-03-10 22:27:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 905. [2021-03-10 22:27:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-03-10 22:27:22,245 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-03-10 22:27:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:22,245 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-03-10 22:27:22,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-03-10 22:27:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:22,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:22,247 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:22,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-10 22:27:22,448 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash -681846126, now seen corresponding path program 61 times [2021-03-10 22:27:22,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:22,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379468552] [2021-03-10 22:27:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:22,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379468552] [2021-03-10 22:27:22,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928340032] [2021-03-10 22:27:22,758 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) [2021-03-10 22:27:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:22,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:23,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:23,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:23,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:23,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:23,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:27:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:23,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:23,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:23,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119466759] [2021-03-10 22:27:23,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:23,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:23,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:23,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:23,098 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:24,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:24,290 INFO L93 Difference]: Finished difference Result 2101 states and 5115 transitions. [2021-03-10 22:27:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:27:24,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:24,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:24,293 INFO L225 Difference]: With dead ends: 2101 [2021-03-10 22:27:24,293 INFO L226 Difference]: Without dead ends: 2092 [2021-03-10 22:27:24,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 873.8ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:27:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-03-10 22:27:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 902. [2021-03-10 22:27:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-03-10 22:27:24,306 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-03-10 22:27:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:24,306 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-03-10 22:27:24,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-03-10 22:27:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:24,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:24,308 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:24,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:24,515 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2034498886, now seen corresponding path program 62 times [2021-03-10 22:27:24,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:24,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390265142] [2021-03-10 22:27:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:24,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390265142] [2021-03-10 22:27:24,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403181213] [2021-03-10 22:27:24,844 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 [2021-03-10 22:27:24,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:24,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:25,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 22:27:25,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:25,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:25,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:25,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-03-10 22:27:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:25,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:25,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:25,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539550641] [2021-03-10 22:27:25,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:25,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:25,110 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:26,913 INFO L93 Difference]: Finished difference Result 2094 states and 5113 transitions. [2021-03-10 22:27:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:27:26,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:26,917 INFO L225 Difference]: With dead ends: 2094 [2021-03-10 22:27:26,917 INFO L226 Difference]: Without dead ends: 2077 [2021-03-10 22:27:26,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1258.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:27:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-03-10 22:27:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 923. [2021-03-10 22:27:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-03-10 22:27:26,928 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-03-10 22:27:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:26,929 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-03-10 22:27:26,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-03-10 22:27:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:26,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:26,930 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:27,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 22:27:27,130 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:27,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1760827148, now seen corresponding path program 63 times [2021-03-10 22:27:27,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:27,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547488928] [2021-03-10 22:27:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:27,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547488928] [2021-03-10 22:27:27,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933433985] [2021-03-10 22:27:27,456 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 [2021-03-10 22:27:27,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:27:27,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:27,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:27:27,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:27,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:27,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:27,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:27,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:27,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:27:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:27,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:27,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-03-10 22:27:27,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403139300] [2021-03-10 22:27:27,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:27:27,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:27:27,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:27:27,766 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:29,923 INFO L93 Difference]: Finished difference Result 2616 states and 6420 transitions. [2021-03-10 22:27:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:27:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:29,927 INFO L225 Difference]: With dead ends: 2616 [2021-03-10 22:27:29,927 INFO L226 Difference]: Without dead ends: 2601 [2021-03-10 22:27:29,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1731.6ms TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:27:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-03-10 22:27:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 935. [2021-03-10 22:27:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3822269807280514) internal successors, (2225), 934 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2225 transitions. [2021-03-10 22:27:29,942 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2225 transitions. Word has length 29 [2021-03-10 22:27:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:29,942 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2225 transitions. [2021-03-10 22:27:29,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2225 transitions. [2021-03-10 22:27:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:29,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:29,943 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:30,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-10 22:27:30,144 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:30,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1095623980, now seen corresponding path program 64 times [2021-03-10 22:27:30,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:30,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984167739] [2021-03-10 22:27:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:30,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984167739] [2021-03-10 22:27:30,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221046834] [2021-03-10 22:27:30,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:30,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:27:30,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:30,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:30,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:30,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:30,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:30,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:30,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:27:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:30,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:30,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:27:30,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882751301] [2021-03-10 22:27:30,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:27:30,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:27:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:27:30,711 INFO L87 Difference]: Start difference. First operand 935 states and 2225 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:32,145 INFO L93 Difference]: Finished difference Result 2210 states and 5419 transitions. [2021-03-10 22:27:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:27:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:32,149 INFO L225 Difference]: With dead ends: 2210 [2021-03-10 22:27:32,149 INFO L226 Difference]: Without dead ends: 2191 [2021-03-10 22:27:32,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1067.2ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:27:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-03-10 22:27:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 914. [2021-03-10 22:27:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-03-10 22:27:32,163 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-03-10 22:27:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:32,163 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-03-10 22:27:32,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-03-10 22:27:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:32,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:32,164 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:32,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 22:27:32,365 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash -195203804, now seen corresponding path program 65 times [2021-03-10 22:27:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:32,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28222901] [2021-03-10 22:27:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:32,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28222901] [2021-03-10 22:27:32,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582164299] [2021-03-10 22:27:32,645 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:32,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:27:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:32,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:32,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:32,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:32,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:32,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:32,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:27:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:32,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:32,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:27:32,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078350666] [2021-03-10 22:27:32,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:27:32,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:32,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:27:32,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:27:32,902 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:35,004 INFO L93 Difference]: Finished difference Result 2713 states and 6752 transitions. [2021-03-10 22:27:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:27:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:35,008 INFO L225 Difference]: With dead ends: 2713 [2021-03-10 22:27:35,008 INFO L226 Difference]: Without dead ends: 2700 [2021-03-10 22:27:35,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1511.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:27:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-03-10 22:27:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 935. [2021-03-10 22:27:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3832976445396143) internal successors, (2226), 934 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2226 transitions. [2021-03-10 22:27:35,026 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2226 transitions. Word has length 29 [2021-03-10 22:27:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:35,026 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2226 transitions. [2021-03-10 22:27:35,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2226 transitions. [2021-03-10 22:27:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:35,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:35,028 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:35,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 22:27:35,251 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:35,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1561197246, now seen corresponding path program 66 times [2021-03-10 22:27:35,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:35,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410008609] [2021-03-10 22:27:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:35,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410008609] [2021-03-10 22:27:35,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318385217] [2021-03-10 22:27:35,530 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 [2021-03-10 22:27:35,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:27:35,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:35,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:27:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:35,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:35,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:35,840 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-03-10 22:27:35,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:27:35,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:35,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:35,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:79 [2021-03-10 22:27:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:35,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:35,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 22:27:35,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164819109] [2021-03-10 22:27:35,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:27:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:35,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:27:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:27:35,959 INFO L87 Difference]: Start difference. First operand 935 states and 2226 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) [2021-03-10 22:27:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:38,155 INFO L93 Difference]: Finished difference Result 2404 states and 5965 transitions. [2021-03-10 22:27:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:27:38,156 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 29 [2021-03-10 22:27:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:38,159 INFO L225 Difference]: With dead ends: 2404 [2021-03-10 22:27:38,160 INFO L226 Difference]: Without dead ends: 2392 [2021-03-10 22:27:38,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1612.9ms TimeCoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:27:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-03-10 22:27:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 948. [2021-03-10 22:27:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.3885955649419217) internal successors, (2262), 947 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2262 transitions. [2021-03-10 22:27:38,174 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2262 transitions. Word has length 29 [2021-03-10 22:27:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:38,174 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 2262 transitions. [2021-03-10 22:27:38,174 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) [2021-03-10 22:27:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2262 transitions. [2021-03-10 22:27:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:38,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:38,175 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:38,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-03-10 22:27:38,376 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash 366523930, now seen corresponding path program 67 times [2021-03-10 22:27:38,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:38,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015194437] [2021-03-10 22:27:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:38,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015194437] [2021-03-10 22:27:38,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193247171] [2021-03-10 22:27:38,672 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) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:38,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:38,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:27:38,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:38,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:38,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:38,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:27:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:38,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:38,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:27:38,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313833635] [2021-03-10 22:27:38,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:27:38,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:38,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:27:38,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:27:38,953 INFO L87 Difference]: Start difference. First operand 948 states and 2262 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:40,560 INFO L93 Difference]: Finished difference Result 2221 states and 5461 transitions. [2021-03-10 22:27:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:27:40,561 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:40,564 INFO L225 Difference]: With dead ends: 2221 [2021-03-10 22:27:40,564 INFO L226 Difference]: Without dead ends: 2204 [2021-03-10 22:27:40,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1102.3ms TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:27:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-03-10 22:27:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 923. [2021-03-10 22:27:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-03-10 22:27:40,579 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-03-10 22:27:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:40,579 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-03-10 22:27:40,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-03-10 22:27:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:40,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:40,580 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:40,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:40,781 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:40,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1204815982, now seen corresponding path program 68 times [2021-03-10 22:27:40,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:40,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877386495] [2021-03-10 22:27:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:41,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877386495] [2021-03-10 22:27:41,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116412580] [2021-03-10 22:27:41,065 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 [2021-03-10 22:27:41,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:41,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:41,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:41,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:41,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:41,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:41,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:41,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:41,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:27:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:41,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:41,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-10 22:27:41,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745722331] [2021-03-10 22:27:41,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:27:41,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:41,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:27:41,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:27:41,406 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:43,134 INFO L93 Difference]: Finished difference Result 2192 states and 5373 transitions. [2021-03-10 22:27:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:27:43,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:43,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:43,138 INFO L225 Difference]: With dead ends: 2192 [2021-03-10 22:27:43,138 INFO L226 Difference]: Without dead ends: 2182 [2021-03-10 22:27:43,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1197.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:27:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-03-10 22:27:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 905. [2021-03-10 22:27:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-03-10 22:27:43,153 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-03-10 22:27:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:43,153 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-03-10 22:27:43,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-03-10 22:27:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:43,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:43,154 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:43,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 22:27:43,355 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:43,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1872493656, now seen corresponding path program 69 times [2021-03-10 22:27:43,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:43,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266834372] [2021-03-10 22:27:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:43,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266834372] [2021-03-10 22:27:43,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199466022] [2021-03-10 22:27:43,653 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 [2021-03-10 22:27:43,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:27:43,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:43,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:27:43,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:43,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:43,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:43,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:43,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:43,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:27:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:43,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:43,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-03-10 22:27:43,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795562807] [2021-03-10 22:27:43,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:27:43,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:27:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:27:43,985 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:45,637 INFO L93 Difference]: Finished difference Result 2077 states and 5071 transitions. [2021-03-10 22:27:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:27:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:45,641 INFO L225 Difference]: With dead ends: 2077 [2021-03-10 22:27:45,641 INFO L226 Difference]: Without dead ends: 2060 [2021-03-10 22:27:45,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1201.9ms TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:27:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-03-10 22:27:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 915. [2021-03-10 22:27:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.3785557986870898) internal successors, (2174), 914 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2174 transitions. [2021-03-10 22:27:45,655 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2174 transitions. Word has length 29 [2021-03-10 22:27:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:45,655 INFO L480 AbstractCegarLoop]: Abstraction has 915 states and 2174 transitions. [2021-03-10 22:27:45,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2174 transitions. [2021-03-10 22:27:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:45,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:45,656 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:45,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 22:27:45,857 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821918, now seen corresponding path program 70 times [2021-03-10 22:27:45,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:45,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761720160] [2021-03-10 22:27:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:46,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761720160] [2021-03-10 22:27:46,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549968938] [2021-03-10 22:27:46,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:46,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:27:46,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:46,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:46,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:46,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:46,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:27:46,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:46,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:46,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:46,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:27:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:46,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:46,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:46,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50437879] [2021-03-10 22:27:46,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:46,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:46,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:46,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:46,408 INFO L87 Difference]: Start difference. First operand 915 states and 2174 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:48,347 INFO L93 Difference]: Finished difference Result 2689 states and 6592 transitions. [2021-03-10 22:27:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:27:48,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:27:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:48,352 INFO L225 Difference]: With dead ends: 2689 [2021-03-10 22:27:48,352 INFO L226 Difference]: Without dead ends: 2676 [2021-03-10 22:27:48,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1422.5ms TimeCoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:27:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-03-10 22:27:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 939. [2021-03-10 22:27:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.384861407249467) internal successors, (2237), 938 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2237 transitions. [2021-03-10 22:27:48,376 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2237 transitions. Word has length 29 [2021-03-10 22:27:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:48,376 INFO L480 AbstractCegarLoop]: Abstraction has 939 states and 2237 transitions. [2021-03-10 22:27:48,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2237 transitions. [2021-03-10 22:27:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:48,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:48,377 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:48,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 22:27:48,578 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:48,578 INFO L82 PathProgramCache]: Analyzing trace with hash -933618750, now seen corresponding path program 71 times [2021-03-10 22:27:48,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:48,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046963543] [2021-03-10 22:27:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:48,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046963543] [2021-03-10 22:27:48,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782297328] [2021-03-10 22:27:48,871 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 [2021-03-10 22:27:48,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:27:48,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:48,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:48,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:49,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:27:49,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:49,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:49,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:49,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:27:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:49,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:49,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:27:49,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169245750] [2021-03-10 22:27:49,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:27:49,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:27:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:27:49,134 INFO L87 Difference]: Start difference. First operand 939 states and 2237 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:50,330 INFO L93 Difference]: Finished difference Result 2287 states and 5614 transitions. [2021-03-10 22:27:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:27:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:50,334 INFO L225 Difference]: With dead ends: 2287 [2021-03-10 22:27:50,334 INFO L226 Difference]: Without dead ends: 2269 [2021-03-10 22:27:50,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1033.0ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:27:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-03-10 22:27:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 914. [2021-03-10 22:27:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-03-10 22:27:50,347 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-03-10 22:27:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:50,347 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-03-10 22:27:50,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-03-10 22:27:50,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:50,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:50,348 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:50,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 22:27:50,551 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1639155038, now seen corresponding path program 72 times [2021-03-10 22:27:50,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:50,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085274885] [2021-03-10 22:27:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:50,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085274885] [2021-03-10 22:27:50,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377000601] [2021-03-10 22:27:50,838 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 [2021-03-10 22:27:50,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:27:50,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:50,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:27:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:51,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:51,140 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-03-10 22:27:51,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:27:51,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:51,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:51,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-03-10 22:27:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:51,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:51,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:27:51,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104670337] [2021-03-10 22:27:51,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:27:51,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:51,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:27:51,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:27:51,299 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:53,525 INFO L93 Difference]: Finished difference Result 2380 states and 5786 transitions. [2021-03-10 22:27:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:27:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:53,529 INFO L225 Difference]: With dead ends: 2380 [2021-03-10 22:27:53,529 INFO L226 Difference]: Without dead ends: 2371 [2021-03-10 22:27:53,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1816.8ms TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:27:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-03-10 22:27:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 919. [2021-03-10 22:27:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.3801742919389977) internal successors, (2185), 918 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2185 transitions. [2021-03-10 22:27:53,542 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2185 transitions. Word has length 29 [2021-03-10 22:27:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:53,543 INFO L480 AbstractCegarLoop]: Abstraction has 919 states and 2185 transitions. [2021-03-10 22:27:53,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2185 transitions. [2021-03-10 22:27:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:53,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:53,544 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:53,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-10 22:27:53,745 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:53,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2110585336, now seen corresponding path program 73 times [2021-03-10 22:27:53,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:53,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899947324] [2021-03-10 22:27:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:53,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899947324] [2021-03-10 22:27:53,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778091553] [2021-03-10 22:27:53,995 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 [2021-03-10 22:27:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:54,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:27:54,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:54,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:54,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:54,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:27:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:54,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:54,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:54,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286466037] [2021-03-10 22:27:54,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:54,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:54,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:54,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:54,280 INFO L87 Difference]: Start difference. First operand 919 states and 2185 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:55,380 INFO L93 Difference]: Finished difference Result 2147 states and 5229 transitions. [2021-03-10 22:27:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:27:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:55,384 INFO L225 Difference]: With dead ends: 2147 [2021-03-10 22:27:55,384 INFO L226 Difference]: Without dead ends: 2138 [2021-03-10 22:27:55,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 823.0ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:27:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-03-10 22:27:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 914. [2021-03-10 22:27:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-03-10 22:27:55,396 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-03-10 22:27:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:55,396 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-03-10 22:27:55,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-03-10 22:27:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:55,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:55,397 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:55,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:55,597 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1607286566, now seen corresponding path program 74 times [2021-03-10 22:27:55,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:55,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496221411] [2021-03-10 22:27:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:55,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496221411] [2021-03-10 22:27:55,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265923527] [2021-03-10 22:27:55,878 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 [2021-03-10 22:27:55,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:55,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:55,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:55,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:27:56,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 22:27:56,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:27:56,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:56,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:56,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-03-10 22:27:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:56,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:56,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:27:56,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677482848] [2021-03-10 22:27:56,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:27:56,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:56,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:27:56,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:56,163 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:57,780 INFO L93 Difference]: Finished difference Result 2251 states and 5462 transitions. [2021-03-10 22:27:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:27:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:27:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:57,784 INFO L225 Difference]: With dead ends: 2251 [2021-03-10 22:27:57,784 INFO L226 Difference]: Without dead ends: 2242 [2021-03-10 22:27:57,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1170.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:27:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-03-10 22:27:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 902. [2021-03-10 22:27:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-03-10 22:27:57,799 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-03-10 22:27:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:57,799 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-03-10 22:27:57,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-03-10 22:27:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:27:57,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:57,800 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:58,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 22:27:58,001 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1416027862, now seen corresponding path program 75 times [2021-03-10 22:27:58,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:58,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701331552] [2021-03-10 22:27:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:58,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701331552] [2021-03-10 22:27:58,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634798554] [2021-03-10 22:27:58,308 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 [2021-03-10 22:27:58,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:27:58,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:58,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:27:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:58,584 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-03-10 22:27:58,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-03-10 22:27:58,591 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:58,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:27:58,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:27:58,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:19 [2021-03-10 22:27:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:58,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:58,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-10 22:27:58,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470028634] [2021-03-10 22:27:58,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:27:58,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:27:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:27:58,647 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:00,046 INFO L93 Difference]: Finished difference Result 2270 states and 5585 transitions. [2021-03-10 22:28:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:28:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:00,051 INFO L225 Difference]: With dead ends: 2270 [2021-03-10 22:28:00,051 INFO L226 Difference]: Without dead ends: 2261 [2021-03-10 22:28:00,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 970.4ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:28:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-03-10 22:28:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 923. [2021-03-10 22:28:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-03-10 22:28:00,067 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-03-10 22:28:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:00,067 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-03-10 22:28:00,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-03-10 22:28:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:00,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:00,068 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:00,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 22:28:00,270 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1142356124, now seen corresponding path program 76 times [2021-03-10 22:28:00,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:00,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454141599] [2021-03-10 22:28:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:00,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454141599] [2021-03-10 22:28:00,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413884024] [2021-03-10 22:28:00,588 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 [2021-03-10 22:28:00,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:28:00,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:00,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:00,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:28:00,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:00,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:00,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:00,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:28:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:00,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:00,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:28:00,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158517399] [2021-03-10 22:28:00,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:28:00,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:28:00,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:28:00,861 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:01,815 INFO L93 Difference]: Finished difference Result 2303 states and 5689 transitions. [2021-03-10 22:28:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:28:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:01,819 INFO L225 Difference]: With dead ends: 2303 [2021-03-10 22:28:01,819 INFO L226 Difference]: Without dead ends: 2292 [2021-03-10 22:28:01,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 869.2ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:28:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-03-10 22:28:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 935. [2021-03-10 22:28:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3843683083511777) internal successors, (2227), 934 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2227 transitions. [2021-03-10 22:28:01,832 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2227 transitions. Word has length 29 [2021-03-10 22:28:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:01,832 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2227 transitions. [2021-03-10 22:28:01,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2227 transitions. [2021-03-10 22:28:01,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:01,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:01,834 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:02,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 22:28:02,035 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:02,036 INFO L82 PathProgramCache]: Analyzing trace with hash -477152956, now seen corresponding path program 77 times [2021-03-10 22:28:02,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:02,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462262592] [2021-03-10 22:28:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:02,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462262592] [2021-03-10 22:28:02,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496213633] [2021-03-10 22:28:02,319 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 [2021-03-10 22:28:02,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:28:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:02,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:28:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:02,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:02,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:28:02,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:28:02,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-03-10 22:28:02,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:02,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:02,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:02,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-03-10 22:28:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:02,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:02,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 22:28:02,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527664728] [2021-03-10 22:28:02,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:28:02,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:28:02,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:28:02,738 INFO L87 Difference]: Start difference. First operand 935 states and 2227 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) [2021-03-10 22:28:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:04,224 INFO L93 Difference]: Finished difference Result 2242 states and 5540 transitions. [2021-03-10 22:28:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:28:04,225 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 29 [2021-03-10 22:28:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:04,230 INFO L225 Difference]: With dead ends: 2242 [2021-03-10 22:28:04,230 INFO L226 Difference]: Without dead ends: 2231 [2021-03-10 22:28:04,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1275.8ms TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:28:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-03-10 22:28:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 945. [2021-03-10 22:28:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.389830508474576) internal successors, (2256), 944 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2256 transitions. [2021-03-10 22:28:04,245 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2256 transitions. Word has length 29 [2021-03-10 22:28:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:04,245 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 2256 transitions. [2021-03-10 22:28:04,245 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) [2021-03-10 22:28:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2256 transitions. [2021-03-10 22:28:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:04,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:04,247 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:04,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 22:28:04,448 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:04,448 INFO L82 PathProgramCache]: Analyzing trace with hash 865294968, now seen corresponding path program 78 times [2021-03-10 22:28:04,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:04,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180025812] [2021-03-10 22:28:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:04,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180025812] [2021-03-10 22:28:04,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572450167] [2021-03-10 22:28:04,800 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 [2021-03-10 22:28:04,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:28:04,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:04,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:04,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:04,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:28:05,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:05,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:05,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:05,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:28:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:05,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:05,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:28:05,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500928397] [2021-03-10 22:28:05,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:28:05,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:28:05,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:28:05,051 INFO L87 Difference]: Start difference. First operand 945 states and 2256 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:06,710 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-03-10 22:28:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:28:06,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:06,714 INFO L225 Difference]: With dead ends: 2742 [2021-03-10 22:28:06,714 INFO L226 Difference]: Without dead ends: 2722 [2021-03-10 22:28:06,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1357.6ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:28:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-03-10 22:28:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 914. [2021-03-10 22:28:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-03-10 22:28:06,729 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-03-10 22:28:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:06,729 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-03-10 22:28:06,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-03-10 22:28:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:06,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:06,731 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:06,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:06,932 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash 216748502, now seen corresponding path program 79 times [2021-03-10 22:28:06,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:06,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557305605] [2021-03-10 22:28:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:07,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557305605] [2021-03-10 22:28:07,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494058613] [2021-03-10 22:28:07,269 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 [2021-03-10 22:28:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:07,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:07,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:07,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:28:07,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:07,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:07,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:07,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:28:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:07,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:07,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:28:07,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336448483] [2021-03-10 22:28:07,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:28:07,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:07,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:28:07,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:28:07,613 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:09,386 INFO L93 Difference]: Finished difference Result 2294 states and 5646 transitions. [2021-03-10 22:28:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:28:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:09,390 INFO L225 Difference]: With dead ends: 2294 [2021-03-10 22:28:09,390 INFO L226 Difference]: Without dead ends: 2283 [2021-03-10 22:28:09,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1491.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:28:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-03-10 22:28:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 935. [2021-03-10 22:28:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3843683083511777) internal successors, (2227), 934 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2227 transitions. [2021-03-10 22:28:09,404 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2227 transitions. Word has length 29 [2021-03-10 22:28:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:09,404 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2227 transitions. [2021-03-10 22:28:09,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2227 transitions. [2021-03-10 22:28:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:09,406 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:09,406 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:09,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:09,606 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:09,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1973149552, now seen corresponding path program 80 times [2021-03-10 22:28:09,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:09,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526632219] [2021-03-10 22:28:09,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:09,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526632219] [2021-03-10 22:28:09,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723727728] [2021-03-10 22:28:09,942 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 [2021-03-10 22:28:09,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:28:09,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:09,966 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:28:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:10,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:10,227 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-03-10 22:28:10,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:28:10,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:10,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:10,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:90 [2021-03-10 22:28:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:10,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:10,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-03-10 22:28:10,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35045296] [2021-03-10 22:28:10,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:28:10,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:28:10,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:28:10,501 INFO L87 Difference]: Start difference. First operand 935 states and 2227 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:12,608 INFO L93 Difference]: Finished difference Result 2334 states and 5752 transitions. [2021-03-10 22:28:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:28:12,609 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:12,612 INFO L225 Difference]: With dead ends: 2334 [2021-03-10 22:28:12,612 INFO L226 Difference]: Without dead ends: 2322 [2021-03-10 22:28:12,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1727.1ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:28:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-03-10 22:28:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 958. [2021-03-10 22:28:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.3908045977011496) internal successors, (2288), 957 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2288 transitions. [2021-03-10 22:28:12,625 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2288 transitions. Word has length 29 [2021-03-10 22:28:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:12,625 INFO L480 AbstractCegarLoop]: Abstraction has 958 states and 2288 transitions. [2021-03-10 22:28:12,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2288 transitions. [2021-03-10 22:28:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:12,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:12,626 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:12,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-03-10 22:28:12,827 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:12,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1055199362, now seen corresponding path program 81 times [2021-03-10 22:28:12,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:12,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305583960] [2021-03-10 22:28:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:13,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305583960] [2021-03-10 22:28:13,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047454653] [2021-03-10 22:28:13,189 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 [2021-03-10 22:28:13,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:28:13,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:13,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:13,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:13,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:28:13,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:13,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:13,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:13,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:28:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:13,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:13,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:28:13,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143197140] [2021-03-10 22:28:13,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:28:13,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:13,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:28:13,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:28:13,502 INFO L87 Difference]: Start difference. First operand 958 states and 2288 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:16,091 INFO L93 Difference]: Finished difference Result 2645 states and 6489 transitions. [2021-03-10 22:28:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:28:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:28:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:16,095 INFO L225 Difference]: With dead ends: 2645 [2021-03-10 22:28:16,096 INFO L226 Difference]: Without dead ends: 2618 [2021-03-10 22:28:16,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2186.1ms TimeCoverageRelationStatistics Valid=500, Invalid=2152, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:28:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-03-10 22:28:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 923. [2021-03-10 22:28:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-03-10 22:28:16,110 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-03-10 22:28:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:16,110 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-03-10 22:28:16,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-03-10 22:28:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:16,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:16,112 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:16,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:16,312 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:16,313 INFO L82 PathProgramCache]: Analyzing trace with hash -792863676, now seen corresponding path program 82 times [2021-03-10 22:28:16,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:16,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728379692] [2021-03-10 22:28:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:16,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728379692] [2021-03-10 22:28:16,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198203343] [2021-03-10 22:28:16,647 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 [2021-03-10 22:28:16,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:28:16,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:16,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:28:16,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:16,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:16,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:16,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:28:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:16,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:16,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:28:16,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212437814] [2021-03-10 22:28:16,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:28:16,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:16,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:28:16,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:28:16,966 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:19,328 INFO L93 Difference]: Finished difference Result 2095 states and 5104 transitions. [2021-03-10 22:28:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:28:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:28:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:19,332 INFO L225 Difference]: With dead ends: 2095 [2021-03-10 22:28:19,332 INFO L226 Difference]: Without dead ends: 2072 [2021-03-10 22:28:19,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1621.6ms TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:28:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-03-10 22:28:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 905. [2021-03-10 22:28:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-03-10 22:28:19,344 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-03-10 22:28:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:19,345 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-03-10 22:28:19,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-03-10 22:28:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:19,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:19,346 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:19,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-03-10 22:28:19,547 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1290856278, now seen corresponding path program 83 times [2021-03-10 22:28:19,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:19,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481784016] [2021-03-10 22:28:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:19,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481784016] [2021-03-10 22:28:19,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833929740] [2021-03-10 22:28:19,831 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 [2021-03-10 22:28:19,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:28:19,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:20,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:28:20,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:20,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:20,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:20,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:28:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:20,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:20,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:28:20,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263194554] [2021-03-10 22:28:20,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:28:20,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:28:20,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:28:20,108 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:21,508 INFO L93 Difference]: Finished difference Result 2445 states and 6022 transitions. [2021-03-10 22:28:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:28:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:21,513 INFO L225 Difference]: With dead ends: 2445 [2021-03-10 22:28:21,513 INFO L226 Difference]: Without dead ends: 2434 [2021-03-10 22:28:21,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1047.4ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:28:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-03-10 22:28:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 939. [2021-03-10 22:28:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.386993603411514) internal successors, (2239), 938 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2239 transitions. [2021-03-10 22:28:21,527 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2239 transitions. Word has length 29 [2021-03-10 22:28:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:21,527 INFO L480 AbstractCegarLoop]: Abstraction has 939 states and 2239 transitions. [2021-03-10 22:28:21,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2239 transitions. [2021-03-10 22:28:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:21,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:21,528 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:21,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:21,729 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash 465544772, now seen corresponding path program 84 times [2021-03-10 22:28:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:21,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031113448] [2021-03-10 22:28:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:22,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031113448] [2021-03-10 22:28:22,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958934674] [2021-03-10 22:28:22,011 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 [2021-03-10 22:28:22,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:28:22,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:22,031 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:28:22,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:22,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:22,349 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 19 treesize of output 35 [2021-03-10 22:28:22,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:28:22,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:22,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:22,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:180 [2021-03-10 22:28:22,623 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:28:22,793 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:28:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:22,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:22,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-03-10 22:28:22,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845187781] [2021-03-10 22:28:22,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:28:22,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:28:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:28:22,863 INFO L87 Difference]: Start difference. First operand 939 states and 2239 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:25,728 INFO L93 Difference]: Finished difference Result 2351 states and 5788 transitions. [2021-03-10 22:28:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:28:25,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:25,732 INFO L225 Difference]: With dead ends: 2351 [2021-03-10 22:28:25,732 INFO L226 Difference]: Without dead ends: 2338 [2021-03-10 22:28:25,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 2344.1ms TimeCoverageRelationStatistics Valid=404, Invalid=2248, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:28:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-03-10 22:28:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 947. [2021-03-10 22:28:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.383720930232558) internal successors, (2255), 946 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2255 transitions. [2021-03-10 22:28:25,744 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2255 transitions. Word has length 29 [2021-03-10 22:28:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:25,744 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 2255 transitions. [2021-03-10 22:28:25,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2255 transitions. [2021-03-10 22:28:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:25,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:25,745 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:25,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:25,947 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash -452405418, now seen corresponding path program 85 times [2021-03-10 22:28:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:25,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121124911] [2021-03-10 22:28:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:26,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121124911] [2021-03-10 22:28:26,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90168241] [2021-03-10 22:28:26,234 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 [2021-03-10 22:28:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:26,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:26,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:28:26,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:26,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:26,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:26,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:28:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:26,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:26,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:28:26,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808669999] [2021-03-10 22:28:26,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:28:26,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:26,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:28:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:28:26,528 INFO L87 Difference]: Start difference. First operand 947 states and 2255 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:28,804 INFO L93 Difference]: Finished difference Result 2777 states and 6800 transitions. [2021-03-10 22:28:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:28:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:28:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:28,809 INFO L225 Difference]: With dead ends: 2777 [2021-03-10 22:28:28,809 INFO L226 Difference]: Without dead ends: 2759 [2021-03-10 22:28:28,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1778.8ms TimeCoverageRelationStatistics Valid=431, Invalid=1731, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:28:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-03-10 22:28:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 935. [2021-03-10 22:28:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.380085653104925) internal successors, (2223), 934 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2223 transitions. [2021-03-10 22:28:28,823 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2223 transitions. Word has length 29 [2021-03-10 22:28:28,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:28,823 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2223 transitions. [2021-03-10 22:28:28,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2223 transitions. [2021-03-10 22:28:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:28,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:28,825 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:29,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:29,026 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1105795140, now seen corresponding path program 86 times [2021-03-10 22:28:29,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:29,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804934165] [2021-03-10 22:28:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:29,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804934165] [2021-03-10 22:28:29,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826471769] [2021-03-10 22:28:29,361 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 [2021-03-10 22:28:29,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:28:29,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:29,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:28:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:29,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:29,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:29,807 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-03-10 22:28:29,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:28:29,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:29,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:29,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-03-10 22:28:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:30,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:30,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:28:30,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036547931] [2021-03-10 22:28:30,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:28:30,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:30,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:28:30,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:28:30,050 INFO L87 Difference]: Start difference. First operand 935 states and 2223 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:31,722 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 22:28:32,091 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 22:28:32,265 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-10 22:28:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:32,687 INFO L93 Difference]: Finished difference Result 2321 states and 5636 transitions. [2021-03-10 22:28:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:28:32,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 29 [2021-03-10 22:28:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:32,691 INFO L225 Difference]: With dead ends: 2321 [2021-03-10 22:28:32,691 INFO L226 Difference]: Without dead ends: 2301 [2021-03-10 22:28:32,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1973.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:28:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-03-10 22:28:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 920. [2021-03-10 22:28:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.3754080522306857) internal successors, (2183), 919 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2183 transitions. [2021-03-10 22:28:32,711 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2183 transitions. Word has length 29 [2021-03-10 22:28:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:32,711 INFO L480 AbstractCegarLoop]: Abstraction has 920 states and 2183 transitions. [2021-03-10 22:28:32,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2183 transitions. [2021-03-10 22:28:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:32,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:32,712 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:32,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:32,913 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1875927132, now seen corresponding path program 87 times [2021-03-10 22:28:32,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:32,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723871541] [2021-03-10 22:28:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:33,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723871541] [2021-03-10 22:28:33,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703828055] [2021-03-10 22:28:33,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:33,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:28:33,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:33,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:28:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:33,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:28:33,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:33,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:33,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:33,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:28:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:33,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:33,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-03-10 22:28:33,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787533315] [2021-03-10 22:28:33,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:28:33,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:33,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:28:33,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:28:33,668 INFO L87 Difference]: Start difference. First operand 920 states and 2183 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:35,496 INFO L93 Difference]: Finished difference Result 2100 states and 5101 transitions. [2021-03-10 22:28:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:28:35,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:35,499 INFO L225 Difference]: With dead ends: 2100 [2021-03-10 22:28:35,499 INFO L226 Difference]: Without dead ends: 2090 [2021-03-10 22:28:35,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1307.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:28:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-03-10 22:28:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 914. [2021-03-10 22:28:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.375684556407448) internal successors, (2169), 913 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2169 transitions. [2021-03-10 22:28:35,511 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2169 transitions. Word has length 29 [2021-03-10 22:28:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:35,511 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2169 transitions. [2021-03-10 22:28:35,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2169 transitions. [2021-03-10 22:28:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:35,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:35,512 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:35,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:35,713 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash 48077248, now seen corresponding path program 88 times [2021-03-10 22:28:35,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:35,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944413464] [2021-03-10 22:28:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:36,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944413464] [2021-03-10 22:28:36,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354404627] [2021-03-10 22:28:36,147 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:36,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:28:36,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:36,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:36,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:36,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:28:36,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:36,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:36,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:36,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:28:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:36,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:36,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:28:36,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069252172] [2021-03-10 22:28:36,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:28:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:28:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:28:36,511 INFO L87 Difference]: Start difference. First operand 914 states and 2169 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:37,574 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 22:28:39,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:39,058 INFO L93 Difference]: Finished difference Result 2106 states and 5144 transitions. [2021-03-10 22:28:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:28:39,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:39,063 INFO L225 Difference]: With dead ends: 2106 [2021-03-10 22:28:39,063 INFO L226 Difference]: Without dead ends: 2089 [2021-03-10 22:28:39,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1748.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:28:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-03-10 22:28:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 931. [2021-03-10 22:28:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.3806451612903228) internal successors, (2214), 930 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2214 transitions. [2021-03-10 22:28:39,076 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2214 transitions. Word has length 29 [2021-03-10 22:28:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:39,076 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 2214 transitions. [2021-03-10 22:28:39,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2214 transitions. [2021-03-10 22:28:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:39,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:39,078 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:39,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:39,278 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:39,279 INFO L82 PathProgramCache]: Analyzing trace with hash 321748986, now seen corresponding path program 89 times [2021-03-10 22:28:39,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:39,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112287939] [2021-03-10 22:28:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:39,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112287939] [2021-03-10 22:28:39,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451131130] [2021-03-10 22:28:39,850 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 [2021-03-10 22:28:39,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:28:39,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:39,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:40,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:28:40,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:40,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:40,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:40,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:28:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:40,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:40,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:28:40,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551390651] [2021-03-10 22:28:40,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:28:40,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:40,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:28:40,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:28:40,269 INFO L87 Difference]: Start difference. First operand 931 states and 2214 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:42,815 INFO L93 Difference]: Finished difference Result 2627 states and 6455 transitions. [2021-03-10 22:28:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:28:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:28:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:42,819 INFO L225 Difference]: With dead ends: 2627 [2021-03-10 22:28:42,819 INFO L226 Difference]: Without dead ends: 2612 [2021-03-10 22:28:42,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2422.7ms TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:28:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-03-10 22:28:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 943. [2021-03-10 22:28:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.381104033970276) internal successors, (2243), 942 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2243 transitions. [2021-03-10 22:28:42,833 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2243 transitions. Word has length 29 [2021-03-10 22:28:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:42,834 INFO L480 AbstractCegarLoop]: Abstraction has 943 states and 2243 transitions. [2021-03-10 22:28:42,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2243 transitions. [2021-03-10 22:28:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:42,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:42,835 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:43,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-03-10 22:28:43,035 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:43,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:43,036 INFO L82 PathProgramCache]: Analyzing trace with hash 986952154, now seen corresponding path program 90 times [2021-03-10 22:28:43,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:43,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844089105] [2021-03-10 22:28:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844089105] [2021-03-10 22:28:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042947334] [2021-03-10 22:28:43,480 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 [2021-03-10 22:28:43,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:28:43,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:43,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:28:43,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:43,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:28:43,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:43,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:43,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:43,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:28:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:43,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:43,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-03-10 22:28:43,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822531363] [2021-03-10 22:28:43,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:28:43,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:28:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:28:43,857 INFO L87 Difference]: Start difference. First operand 943 states and 2243 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:46,052 INFO L93 Difference]: Finished difference Result 2335 states and 5745 transitions. [2021-03-10 22:28:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:28:46,053 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:46,056 INFO L225 Difference]: With dead ends: 2335 [2021-03-10 22:28:46,056 INFO L226 Difference]: Without dead ends: 2312 [2021-03-10 22:28:46,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1951.3ms TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:28:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-03-10 22:28:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 956. [2021-03-10 22:28:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.386387434554974) internal successors, (2279), 955 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2279 transitions. [2021-03-10 22:28:46,069 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2279 transitions. Word has length 29 [2021-03-10 22:28:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:46,069 INFO L480 AbstractCegarLoop]: Abstraction has 956 states and 2279 transitions. [2021-03-10 22:28:46,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2279 transitions. [2021-03-10 22:28:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:46,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:46,070 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:46,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:46,271 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1887372330, now seen corresponding path program 91 times [2021-03-10 22:28:46,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:46,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104184514] [2021-03-10 22:28:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:46,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104184514] [2021-03-10 22:28:46,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664342837] [2021-03-10 22:28:46,647 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 [2021-03-10 22:28:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:46,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:28:46,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:28:46,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:46,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:46,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:46,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:28:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:46,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:46,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:28:46,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963407308] [2021-03-10 22:28:46,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:28:46,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:46,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:28:46,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:28:46,950 INFO L87 Difference]: Start difference. First operand 956 states and 2279 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:49,118 INFO L93 Difference]: Finished difference Result 2784 states and 6931 transitions. [2021-03-10 22:28:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:28:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:49,122 INFO L225 Difference]: With dead ends: 2784 [2021-03-10 22:28:49,122 INFO L226 Difference]: Without dead ends: 2770 [2021-03-10 22:28:49,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1786.2ms TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:28:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-03-10 22:28:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 974. [2021-03-10 22:28:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.3884892086330933) internal successors, (2324), 973 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2324 transitions. [2021-03-10 22:28:49,135 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2324 transitions. Word has length 29 [2021-03-10 22:28:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:49,135 INFO L480 AbstractCegarLoop]: Abstraction has 974 states and 2324 transitions. [2021-03-10 22:28:49,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2324 transitions. [2021-03-10 22:28:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:49,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:49,136 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:49,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-03-10 22:28:49,337 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash -651193916, now seen corresponding path program 92 times [2021-03-10 22:28:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:49,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173978055] [2021-03-10 22:28:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:49,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173978055] [2021-03-10 22:28:49,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559410557] [2021-03-10 22:28:49,700 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 [2021-03-10 22:28:49,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:28:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:49,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:28:49,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:28:49,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:49,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:49,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-03-10 22:28:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:49,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:49,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 22:28:49,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306420403] [2021-03-10 22:28:49,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:28:49,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:28:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:28:49,989 INFO L87 Difference]: Start difference. First operand 974 states and 2324 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:52,200 INFO L93 Difference]: Finished difference Result 2499 states and 6199 transitions. [2021-03-10 22:28:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:28:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:28:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:52,205 INFO L225 Difference]: With dead ends: 2499 [2021-03-10 22:28:52,205 INFO L226 Difference]: Without dead ends: 2482 [2021-03-10 22:28:52,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1724.7ms TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:28:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-03-10 22:28:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 958. [2021-03-10 22:28:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.3887147335423196) internal successors, (2286), 957 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2286 transitions. [2021-03-10 22:28:52,218 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2286 transitions. Word has length 29 [2021-03-10 22:28:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:52,218 INFO L480 AbstractCegarLoop]: Abstraction has 958 states and 2286 transitions. [2021-03-10 22:28:52,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2286 transitions. [2021-03-10 22:28:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:52,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:52,219 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:52,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-03-10 22:28:52,419 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:52,420 INFO L82 PathProgramCache]: Analyzing trace with hash 877760152, now seen corresponding path program 93 times [2021-03-10 22:28:52,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:52,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550751786] [2021-03-10 22:28:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:52,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550751786] [2021-03-10 22:28:52,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257452638] [2021-03-10 22:28:52,788 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 [2021-03-10 22:28:52,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:28:52,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:52,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:28:52,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:53,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:53,242 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 23 treesize of output 39 [2021-03-10 22:28:53,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:28:53,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:28:53,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:28:53,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:132 [2021-03-10 22:28:53,477 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 22:28:53,790 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 22:28:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:53,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:53,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 22:28:53,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250629444] [2021-03-10 22:28:53,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:28:53,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:28:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:28:53,869 INFO L87 Difference]: Start difference. First operand 958 states and 2286 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:54,917 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-10 22:28:55,711 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 22:28:57,684 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-10 22:28:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:59,245 INFO L93 Difference]: Finished difference Result 2330 states and 5706 transitions. [2021-03-10 22:28:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 22:28:59,246 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 29 [2021-03-10 22:28:59,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:59,250 INFO L225 Difference]: With dead ends: 2330 [2021-03-10 22:28:59,250 INFO L226 Difference]: Without dead ends: 2317 [2021-03-10 22:28:59,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 3939.7ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 22:28:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-03-10 22:28:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 958. [2021-03-10 22:28:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.3887147335423196) internal successors, (2286), 957 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2286 transitions. [2021-03-10 22:28:59,264 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2286 transitions. Word has length 29 [2021-03-10 22:28:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:59,264 INFO L480 AbstractCegarLoop]: Abstraction has 958 states and 2286 transitions. [2021-03-10 22:28:59,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2286 transitions. [2021-03-10 22:28:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:28:59,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:59,265 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:59,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-03-10 22:28:59,465 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash 106621528, now seen corresponding path program 94 times [2021-03-10 22:28:59,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:59,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256964535] [2021-03-10 22:28:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:59,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256964535] [2021-03-10 22:28:59,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957772637] [2021-03-10 22:28:59,881 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 [2021-03-10 22:28:59,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:28:59,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:59,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:28:59,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:00,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:29:00,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:00,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:00,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:00,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:29:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:00,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:00,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-10 22:29:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049958793] [2021-03-10 22:29:00,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:29:00,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:00,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:29:00,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:00,275 INFO L87 Difference]: Start difference. First operand 958 states and 2286 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:02,707 INFO L93 Difference]: Finished difference Result 2327 states and 5701 transitions. [2021-03-10 22:29:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:29:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:29:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:02,711 INFO L225 Difference]: With dead ends: 2327 [2021-03-10 22:29:02,711 INFO L226 Difference]: Without dead ends: 2317 [2021-03-10 22:29:02,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1695.6ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:29:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-03-10 22:29:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 949. [2021-03-10 22:29:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3860759493670884) internal successors, (2262), 948 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2262 transitions. [2021-03-10 22:29:02,725 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2262 transitions. Word has length 29 [2021-03-10 22:29:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:02,725 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 2262 transitions. [2021-03-10 22:29:02,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2262 transitions. [2021-03-10 22:29:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:29:02,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:02,726 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:02,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-03-10 22:29:02,926 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:02,927 INFO L82 PathProgramCache]: Analyzing trace with hash -296310166, now seen corresponding path program 95 times [2021-03-10 22:29:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:02,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460508754] [2021-03-10 22:29:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460508754] [2021-03-10 22:29:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843977132] [2021-03-10 22:29:03,378 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 [2021-03-10 22:29:03,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:29:03,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:03,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:29:03,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:03,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:29:03,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:03,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:03,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:03,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:29:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:03,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:03,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:29:03,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655687105] [2021-03-10 22:29:03,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:29:03,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:03,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:29:03,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:29:03,767 INFO L87 Difference]: Start difference. First operand 949 states and 2262 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:06,503 INFO L93 Difference]: Finished difference Result 2318 states and 5637 transitions. [2021-03-10 22:29:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:29:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:29:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:06,507 INFO L225 Difference]: With dead ends: 2318 [2021-03-10 22:29:06,507 INFO L226 Difference]: Without dead ends: 2301 [2021-03-10 22:29:06,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1922.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:29:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-03-10 22:29:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 967. [2021-03-10 22:29:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.390269151138716) internal successors, (2309), 966 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2309 transitions. [2021-03-10 22:29:06,521 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2309 transitions. Word has length 29 [2021-03-10 22:29:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:06,521 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 2309 transitions. [2021-03-10 22:29:06,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2309 transitions. [2021-03-10 22:29:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:29:06,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:06,522 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:06,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-03-10 22:29:06,722 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:06,723 INFO L82 PathProgramCache]: Analyzing trace with hash -22638428, now seen corresponding path program 96 times [2021-03-10 22:29:06,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:06,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724332968] [2021-03-10 22:29:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:07,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724332968] [2021-03-10 22:29:07,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945064263] [2021-03-10 22:29:07,142 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 [2021-03-10 22:29:07,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:29:07,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:07,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:29:07,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:07,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:29:07,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:29:07,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:07,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:07,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:07,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:15 [2021-03-10 22:29:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:07,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:07,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:29:07,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814187013] [2021-03-10 22:29:07,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:29:07,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:07,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:29:07,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:07,602 INFO L87 Difference]: Start difference. First operand 967 states and 2309 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:10,544 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:29:10,948 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:29:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:11,565 INFO L93 Difference]: Finished difference Result 2746 states and 6763 transitions. [2021-03-10 22:29:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:29:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:29:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:11,570 INFO L225 Difference]: With dead ends: 2746 [2021-03-10 22:29:11,570 INFO L226 Difference]: Without dead ends: 2731 [2021-03-10 22:29:11,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 3005.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:29:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-03-10 22:29:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 995. [2021-03-10 22:29:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.393360160965795) internal successors, (2379), 994 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2379 transitions. [2021-03-10 22:29:11,592 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2379 transitions. Word has length 29 [2021-03-10 22:29:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:11,593 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 2379 transitions. [2021-03-10 22:29:11,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2379 transitions. [2021-03-10 22:29:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:29:11,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:11,594 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:11,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:11,796 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash 642564740, now seen corresponding path program 97 times [2021-03-10 22:29:11,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:11,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472727682] [2021-03-10 22:29:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:12,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472727682] [2021-03-10 22:29:12,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856646513] [2021-03-10 22:29:12,221 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 [2021-03-10 22:29:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:12,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:29:12,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:29:12,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:29:12,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:12,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:12,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:12,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:29:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:12,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:12,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 22:29:12,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329235124] [2021-03-10 22:29:12,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:29:12,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:12,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:29:12,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:12,607 INFO L87 Difference]: Start difference. First operand 995 states and 2379 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:14,916 INFO L93 Difference]: Finished difference Result 2430 states and 5984 transitions. [2021-03-10 22:29:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:29:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:29:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:14,920 INFO L225 Difference]: With dead ends: 2430 [2021-03-10 22:29:14,920 INFO L226 Difference]: Without dead ends: 2412 [2021-03-10 22:29:14,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1744.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:29:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-10 22:29:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 991. [2021-03-10 22:29:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.393939393939394) internal successors, (2370), 990 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2370 transitions. [2021-03-10 22:29:14,933 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2370 transitions. Word has length 29 [2021-03-10 22:29:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:14,933 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 2370 transitions. [2021-03-10 22:29:14,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2370 transitions. [2021-03-10 22:29:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:29:14,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:14,934 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:15,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-03-10 22:29:15,135 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash 813875838, now seen corresponding path program 98 times [2021-03-10 22:29:15,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:15,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107710192] [2021-03-10 22:29:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:15,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107710192] [2021-03-10 22:29:15,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832855021] [2021-03-10 22:29:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:15,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:15,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:29:15,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:15,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:29:15,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:29:15,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:15,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:15,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:15,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:29:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:15,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:15,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-03-10 22:29:15,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821904987] [2021-03-10 22:29:15,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:29:15,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:15,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:29:15,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:29:15,917 INFO L87 Difference]: Start difference. First operand 991 states and 2370 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:18,573 INFO L93 Difference]: Finished difference Result 2822 states and 6939 transitions. [2021-03-10 22:29:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:29:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 29 [2021-03-10 22:29:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:18,579 INFO L225 Difference]: With dead ends: 2822 [2021-03-10 22:29:18,579 INFO L226 Difference]: Without dead ends: 2812 [2021-03-10 22:29:18,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2219.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1714, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:29:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2021-03-10 22:29:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 981. [2021-03-10 22:29:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 2.3887755102040815) internal successors, (2341), 980 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2341 transitions. [2021-03-10 22:29:18,599 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2341 transitions. Word has length 29 [2021-03-10 22:29:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:18,600 INFO L480 AbstractCegarLoop]: Abstraction has 981 states and 2341 transitions. [2021-03-10 22:29:18,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2341 transitions. [2021-03-10 22:29:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:29:18,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:18,601 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:18,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:18,815 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:18,815 INFO L82 PathProgramCache]: Analyzing trace with hash -608198470, now seen corresponding path program 99 times [2021-03-10 22:29:18,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:18,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039429001] [2021-03-10 22:29:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:19,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039429001] [2021-03-10 22:29:19,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898974359] [2021-03-10 22:29:19,179 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 [2021-03-10 22:29:19,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:29:19,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:19,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:29:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:19,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-03-10 22:29:19,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:19,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:19,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:19,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-03-10 22:29:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:19,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:19,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-03-10 22:29:19,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885343135] [2021-03-10 22:29:19,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:29:19,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:29:19,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:29:19,639 INFO L87 Difference]: Start difference. First operand 981 states and 2341 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:21,060 INFO L93 Difference]: Finished difference Result 2159 states and 5265 transitions. [2021-03-10 22:29:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:29:21,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:29:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:21,064 INFO L225 Difference]: With dead ends: 2159 [2021-03-10 22:29:21,064 INFO L226 Difference]: Without dead ends: 2150 [2021-03-10 22:29:21,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1225.8ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:29:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-03-10 22:29:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 979. [2021-03-10 22:29:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 2.3885480572597135) internal successors, (2336), 978 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 2336 transitions. [2021-03-10 22:29:21,076 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 2336 transitions. Word has length 29 [2021-03-10 22:29:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:21,076 INFO L480 AbstractCegarLoop]: Abstraction has 979 states and 2336 transitions. [2021-03-10 22:29:21,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 2336 transitions. [2021-03-10 22:29:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:21,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:21,077 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:21,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:21,279 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash -154214669, now seen corresponding path program 1 times [2021-03-10 22:29:21,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:21,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48457793] [2021-03-10 22:29:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48457793] [2021-03-10 22:29:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393833801] [2021-03-10 22:29:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:21,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:29:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:22,132 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:29:22,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-03-10 22:29:22,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:22,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:22,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:22,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-03-10 22:29:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:22,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:22,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:29:22,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791096411] [2021-03-10 22:29:22,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:29:22,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:22,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:29:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:29:22,181 INFO L87 Difference]: Start difference. First operand 979 states and 2336 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:24,461 INFO L93 Difference]: Finished difference Result 2371 states and 5769 transitions. [2021-03-10 22:29:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:29:24,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:29:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:24,465 INFO L225 Difference]: With dead ends: 2371 [2021-03-10 22:29:24,465 INFO L226 Difference]: Without dead ends: 2361 [2021-03-10 22:29:24,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1279.6ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:29:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-03-10 22:29:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 982. [2021-03-10 22:29:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.3863404689092764) internal successors, (2341), 981 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2341 transitions. [2021-03-10 22:29:24,478 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2341 transitions. Word has length 30 [2021-03-10 22:29:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:24,478 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 2341 transitions. [2021-03-10 22:29:24,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2341 transitions. [2021-03-10 22:29:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:24,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:24,480 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:24,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:24,683 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 351841351, now seen corresponding path program 2 times [2021-03-10 22:29:24,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:24,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252794906] [2021-03-10 22:29:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:25,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252794906] [2021-03-10 22:29:25,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559410364] [2021-03-10 22:29:25,099 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:25,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:25,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:25,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:29:25,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:25,435 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:29:25,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-03-10 22:29:25,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:25,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:25,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:25,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-03-10 22:29:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:25,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:25,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:29:25,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962609884] [2021-03-10 22:29:25,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:29:25,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:25,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:29:25,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:25,491 INFO L87 Difference]: Start difference. First operand 982 states and 2341 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:28,179 INFO L93 Difference]: Finished difference Result 2565 states and 6278 transitions. [2021-03-10 22:29:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:29:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:29:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:28,184 INFO L225 Difference]: With dead ends: 2565 [2021-03-10 22:29:28,184 INFO L226 Difference]: Without dead ends: 2554 [2021-03-10 22:29:28,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1648.1ms TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:29:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-03-10 22:29:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1016. [2021-03-10 22:29:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.3970443349753694) internal successors, (2433), 1015 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2433 transitions. [2021-03-10 22:29:28,198 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2433 transitions. Word has length 30 [2021-03-10 22:29:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:28,198 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 2433 transitions. [2021-03-10 22:29:28,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2433 transitions. [2021-03-10 22:29:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:28,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:28,199 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:28,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-03-10 22:29:28,400 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2108242401, now seen corresponding path program 3 times [2021-03-10 22:29:28,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:28,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987981724] [2021-03-10 22:29:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:28,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987981724] [2021-03-10 22:29:28,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789010977] [2021-03-10 22:29:28,830 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:28,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:29:28,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:28,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:29:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:29,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:29,298 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 20 treesize of output 36 [2021-03-10 22:29:29,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:29,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:29,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:29,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-03-10 22:29:29,487 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 22:29:29,689 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:29:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:29,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:29,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 22:29:29,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135959905] [2021-03-10 22:29:29,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:29:29,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:29,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:29:29,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:29:29,756 INFO L87 Difference]: Start difference. First operand 1016 states and 2433 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:30,232 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:29:31,370 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 22:29:31,758 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 22:29:32,912 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 22:29:33,345 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-10 22:29:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:33,868 INFO L93 Difference]: Finished difference Result 2563 states and 6314 transitions. [2021-03-10 22:29:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:29:33,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-03-10 22:29:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:33,873 INFO L225 Difference]: With dead ends: 2563 [2021-03-10 22:29:33,873 INFO L226 Difference]: Without dead ends: 2550 [2021-03-10 22:29:33,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 3449.7ms TimeCoverageRelationStatistics Valid=486, Invalid=2270, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 22:29:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-03-10 22:29:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1017. [2021-03-10 22:29:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.392716535433071) internal successors, (2431), 1016 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 2431 transitions. [2021-03-10 22:29:33,888 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 2431 transitions. Word has length 30 [2021-03-10 22:29:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:33,888 INFO L480 AbstractCegarLoop]: Abstraction has 1017 states and 2431 transitions. [2021-03-10 22:29:33,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 2431 transitions. [2021-03-10 22:29:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:33,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:33,889 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:34,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-03-10 22:29:34,091 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:34,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:34,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1190292211, now seen corresponding path program 4 times [2021-03-10 22:29:34,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:34,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913629931] [2021-03-10 22:29:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:34,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913629931] [2021-03-10 22:29:34,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218538908] [2021-03-10 22:29:34,579 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:34,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:34,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:29:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:34,991 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-03-10 22:29:34,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-03-10 22:29:34,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:35,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:35,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:35,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:34 [2021-03-10 22:29:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:35,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:35,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-03-10 22:29:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290208105] [2021-03-10 22:29:35,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:29:35,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:35,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:29:35,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:29:35,253 INFO L87 Difference]: Start difference. First operand 1017 states and 2431 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:36,074 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 22:29:36,991 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 22:29:37,496 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-10 22:29:37,816 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 22:29:38,406 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 22:29:38,765 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:29:38,906 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 22:29:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:40,396 INFO L93 Difference]: Finished difference Result 2943 states and 7182 transitions. [2021-03-10 22:29:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:29:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-03-10 22:29:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:40,401 INFO L225 Difference]: With dead ends: 2943 [2021-03-10 22:29:40,401 INFO L226 Difference]: Without dead ends: 2929 [2021-03-10 22:29:40,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 3472.4ms TimeCoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:29:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2021-03-10 22:29:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 1010. [2021-03-10 22:29:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.389494549058474) internal successors, (2411), 1009 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2411 transitions. [2021-03-10 22:29:40,419 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2411 transitions. Word has length 30 [2021-03-10 22:29:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:40,419 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 2411 transitions. [2021-03-10 22:29:40,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2411 transitions. [2021-03-10 22:29:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:40,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:40,420 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:40,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:40,620 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash 111955279, now seen corresponding path program 5 times [2021-03-10 22:29:40,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:40,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077318391] [2021-03-10 22:29:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:41,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077318391] [2021-03-10 22:29:41,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115035959] [2021-03-10 22:29:41,126 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:41,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:29:41,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:41,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:29:41,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:41,485 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:29:41,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-03-10 22:29:41,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:41,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:41,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:41,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-03-10 22:29:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:41,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:41,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:29:41,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524757552] [2021-03-10 22:29:41,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:29:41,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:41,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:29:41,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:29:41,589 INFO L87 Difference]: Start difference. First operand 1010 states and 2411 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) [2021-03-10 22:29:44,131 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 22:29:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:44,919 INFO L93 Difference]: Finished difference Result 2643 states and 6445 transitions. [2021-03-10 22:29:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:29:44,921 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 30 [2021-03-10 22:29:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:44,924 INFO L225 Difference]: With dead ends: 2643 [2021-03-10 22:29:44,924 INFO L226 Difference]: Without dead ends: 2626 [2021-03-10 22:29:44,925 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2099.5ms TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:29:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-03-10 22:29:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1005. [2021-03-10 22:29:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.389442231075697) internal successors, (2399), 1004 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2399 transitions. [2021-03-10 22:29:44,947 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2399 transitions. Word has length 30 [2021-03-10 22:29:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:44,947 INFO L480 AbstractCegarLoop]: Abstraction has 1005 states and 2399 transitions. [2021-03-10 22:29:44,947 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) [2021-03-10 22:29:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2399 transitions. [2021-03-10 22:29:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:44,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:44,948 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:45,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:45,148 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1651280687, now seen corresponding path program 6 times [2021-03-10 22:29:45,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:45,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361252764] [2021-03-10 22:29:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:45,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361252764] [2021-03-10 22:29:45,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773482994] [2021-03-10 22:29:45,744 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:45,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:29:45,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:45,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:29:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:46,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:29:46,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:46,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:46,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:46,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-03-10 22:29:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:46,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:46,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:29:46,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974193584] [2021-03-10 22:29:46,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:29:46,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:29:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:29:46,276 INFO L87 Difference]: Start difference. First operand 1005 states and 2399 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) [2021-03-10 22:29:46,937 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 22:29:47,575 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:29:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:49,364 INFO L93 Difference]: Finished difference Result 2434 states and 5906 transitions. [2021-03-10 22:29:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:29:49,366 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 30 [2021-03-10 22:29:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:49,370 INFO L225 Difference]: With dead ends: 2434 [2021-03-10 22:29:49,370 INFO L226 Difference]: Without dead ends: 2414 [2021-03-10 22:29:49,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1996.3ms TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:29:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-03-10 22:29:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1003. [2021-03-10 22:29:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 2.3892215568862274) internal successors, (2394), 1002 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2394 transitions. [2021-03-10 22:29:49,385 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2394 transitions. Word has length 30 [2021-03-10 22:29:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:49,385 INFO L480 AbstractCegarLoop]: Abstraction has 1003 states and 2394 transitions. [2021-03-10 22:29:49,385 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) [2021-03-10 22:29:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2394 transitions. [2021-03-10 22:29:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:49,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:49,386 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:49,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-03-10 22:29:49,587 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1006114153, now seen corresponding path program 7 times [2021-03-10 22:29:49,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:49,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969527947] [2021-03-10 22:29:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969527947] [2021-03-10 22:29:50,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897073576] [2021-03-10 22:29:50,089 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:50,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:29:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:50,632 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-03-10 22:29:50,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-03-10 22:29:50,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:50,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:50,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:50,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:31 [2021-03-10 22:29:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:50,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-03-10 22:29:50,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115536624] [2021-03-10 22:29:50,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:29:50,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:29:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:29:50,909 INFO L87 Difference]: Start difference. First operand 1003 states and 2394 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,550 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:29:52,052 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-10 22:29:52,522 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:29:52,799 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 22:29:53,000 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:29:53,563 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 22:29:53,782 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 22:29:53,941 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 22:29:54,374 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:29:55,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:55,763 INFO L93 Difference]: Finished difference Result 2555 states and 6195 transitions. [2021-03-10 22:29:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:29:55,764 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-03-10 22:29:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:55,768 INFO L225 Difference]: With dead ends: 2555 [2021-03-10 22:29:55,768 INFO L226 Difference]: Without dead ends: 2524 [2021-03-10 22:29:55,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 3406.1ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:29:55,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-03-10 22:29:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 997. [2021-03-10 22:29:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.38855421686747) internal successors, (2379), 996 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2379 transitions. [2021-03-10 22:29:55,782 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2379 transitions. Word has length 30 [2021-03-10 22:29:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:55,782 INFO L480 AbstractCegarLoop]: Abstraction has 997 states and 2379 transitions. [2021-03-10 22:29:55,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2379 transitions. [2021-03-10 22:29:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:55,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:55,783 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:55,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:55,985 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash -627290201, now seen corresponding path program 8 times [2021-03-10 22:29:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:55,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517673152] [2021-03-10 22:29:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:56,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517673152] [2021-03-10 22:29:56,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483645172] [2021-03-10 22:29:56,571 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:56,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:56,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:56,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:29:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:56,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:29:56,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:57,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:57,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:57,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-03-10 22:29:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:57,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:57,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:29:57,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296968776] [2021-03-10 22:29:57,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:29:57,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:57,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:29:57,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:29:57,072 INFO L87 Difference]: Start difference. First operand 997 states and 2379 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) [2021-03-10 22:29:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:59,538 INFO L93 Difference]: Finished difference Result 2336 states and 5690 transitions. [2021-03-10 22:29:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:29:59,540 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 30 [2021-03-10 22:29:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:59,544 INFO L225 Difference]: With dead ends: 2336 [2021-03-10 22:29:59,544 INFO L226 Difference]: Without dead ends: 2326 [2021-03-10 22:29:59,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1609.7ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:29:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-03-10 22:29:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 997. [2021-03-10 22:29:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.38855421686747) internal successors, (2379), 996 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2379 transitions. [2021-03-10 22:29:59,557 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2379 transitions. Word has length 30 [2021-03-10 22:29:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:59,557 INFO L480 AbstractCegarLoop]: Abstraction has 997 states and 2379 transitions. [2021-03-10 22:29:59,557 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) [2021-03-10 22:29:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2379 transitions. [2021-03-10 22:29:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:59,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:59,558 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:59,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-03-10 22:29:59,771 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:59,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1787800249, now seen corresponding path program 9 times [2021-03-10 22:29:59,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:59,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143417261] [2021-03-10 22:29:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:00,286 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:30:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:00,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143417261] [2021-03-10 22:30:00,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55361160] [2021-03-10 22:30:00,452 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:00,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:30:00,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:00,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:30:00,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:00,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:30:00,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:00,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:00,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:00,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:30:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:01,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:01,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-03-10 22:30:01,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489327169] [2021-03-10 22:30:01,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:30:01,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:30:01,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:30:01,056 INFO L87 Difference]: Start difference. First operand 997 states and 2379 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:01,936 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:30:02,187 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:30:02,349 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:30:02,598 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:30:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:05,290 INFO L93 Difference]: Finished difference Result 2310 states and 5663 transitions. [2021-03-10 22:30:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:30:05,292 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:30:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:05,295 INFO L225 Difference]: With dead ends: 2310 [2021-03-10 22:30:05,295 INFO L226 Difference]: Without dead ends: 2301 [2021-03-10 22:30:05,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2849.7ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:30:05,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-03-10 22:30:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1021. [2021-03-10 22:30:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.3931372549019607) internal successors, (2441), 1020 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2441 transitions. [2021-03-10 22:30:05,309 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2441 transitions. Word has length 30 [2021-03-10 22:30:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:05,310 INFO L480 AbstractCegarLoop]: Abstraction has 1021 states and 2441 transitions. [2021-03-10 22:30:05,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2441 transitions. [2021-03-10 22:30:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:05,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:05,311 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:05,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-03-10 22:30:05,511 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:05,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1886679911, now seen corresponding path program 10 times [2021-03-10 22:30:05,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:05,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894017088] [2021-03-10 22:30:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:06,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894017088] [2021-03-10 22:30:06,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919815578] [2021-03-10 22:30:06,203 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:06,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:06,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:06,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:30:06,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:06,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:30:06,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:06,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:06,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:06,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-03-10 22:30:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:06,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:06,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 22:30:06,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589855590] [2021-03-10 22:30:06,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:30:06,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:30:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:30:06,701 INFO L87 Difference]: Start difference. First operand 1021 states and 2441 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:07,643 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:30:07,812 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:30:08,023 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 22:30:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:10,566 INFO L93 Difference]: Finished difference Result 2339 states and 5743 transitions. [2021-03-10 22:30:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:30:10,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:30:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:10,571 INFO L225 Difference]: With dead ends: 2339 [2021-03-10 22:30:10,571 INFO L226 Difference]: Without dead ends: 2328 [2021-03-10 22:30:10,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2815.5ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:30:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-10 22:30:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1030. [2021-03-10 22:30:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.3974732750242955) internal successors, (2467), 1029 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) [2021-03-10 22:30:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2467 transitions. [2021-03-10 22:30:10,585 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2467 transitions. Word has length 30 [2021-03-10 22:30:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:10,585 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 2467 transitions. [2021-03-10 22:30:10,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2467 transitions. [2021-03-10 22:30:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:10,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:10,586 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:10,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-03-10 22:30:10,787 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:10,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1743084217, now seen corresponding path program 11 times [2021-03-10 22:30:10,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:10,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386076113] [2021-03-10 22:30:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:11,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386076113] [2021-03-10 22:30:11,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700124933] [2021-03-10 22:30:11,442 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:11,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:30:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:11,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:30:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:11,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:30:11,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:11,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:11,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:11,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-03-10 22:30:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:11,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:11,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 22:30:11,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044940808] [2021-03-10 22:30:11,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:30:11,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:30:11,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:30:11,925 INFO L87 Difference]: Start difference. First operand 1030 states and 2467 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:12,903 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 22:30:13,053 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:30:13,285 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 22:30:14,723 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:30:14,931 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 22:30:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:16,062 INFO L93 Difference]: Finished difference Result 2424 states and 5962 transitions. [2021-03-10 22:30:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:30:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:30:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:16,067 INFO L225 Difference]: With dead ends: 2424 [2021-03-10 22:30:16,067 INFO L226 Difference]: Without dead ends: 2404 [2021-03-10 22:30:16,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3038.5ms TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:30:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-03-10 22:30:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1012. [2021-03-10 22:30:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.390702274975272) internal successors, (2417), 1011 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2417 transitions. [2021-03-10 22:30:16,081 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2417 transitions. Word has length 30 [2021-03-10 22:30:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:16,081 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 2417 transitions. [2021-03-10 22:30:16,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2417 transitions. [2021-03-10 22:30:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:16,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:16,082 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:16,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-03-10 22:30:16,283 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1320754679, now seen corresponding path program 12 times [2021-03-10 22:30:16,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:16,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127151460] [2021-03-10 22:30:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:17,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127151460] [2021-03-10 22:30:17,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558230978] [2021-03-10 22:30:17,019 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:17,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:30:17,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:17,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:30:17,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:17,556 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-03-10 22:30:17,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-03-10 22:30:17,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:17,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:17,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:17,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:34 [2021-03-10 22:30:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:17,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:17,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-03-10 22:30:17,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8257084] [2021-03-10 22:30:17,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:30:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:17,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:30:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:30:17,784 INFO L87 Difference]: Start difference. First operand 1012 states and 2417 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:18,323 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:30:18,930 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:30:19,116 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:30:19,323 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:30:19,595 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:30:20,925 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:30:21,137 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 22:30:21,416 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 22:30:21,994 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:30:22,236 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:30:22,933 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:30:23,248 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 22:30:23,467 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 22:30:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:23,956 INFO L93 Difference]: Finished difference Result 2369 states and 5806 transitions. [2021-03-10 22:30:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:30:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:30:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:23,962 INFO L225 Difference]: With dead ends: 2369 [2021-03-10 22:30:23,962 INFO L226 Difference]: Without dead ends: 2358 [2021-03-10 22:30:23,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 4873.9ms TimeCoverageRelationStatistics Valid=494, Invalid=2368, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:30:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-03-10 22:30:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1034. [2021-03-10 22:30:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.397870280735721) internal successors, (2477), 1033 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2477 transitions. [2021-03-10 22:30:23,976 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2477 transitions. Word has length 30 [2021-03-10 22:30:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:23,976 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 2477 transitions. [2021-03-10 22:30:23,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2477 transitions. [2021-03-10 22:30:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:23,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:23,977 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:24,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-03-10 22:30:24,180 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:24,180 INFO L82 PathProgramCache]: Analyzing trace with hash 435646371, now seen corresponding path program 13 times [2021-03-10 22:30:24,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:24,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133716438] [2021-03-10 22:30:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:24,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133716438] [2021-03-10 22:30:24,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912030989] [2021-03-10 22:30:24,956 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:24,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:30:24,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:30:25,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:25,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:25,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:25,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-03-10 22:30:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:25,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:25,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:30:25,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087119688] [2021-03-10 22:30:25,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:25,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:25,448 INFO L87 Difference]: Start difference. First operand 1034 states and 2477 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:25,947 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:30:26,473 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:30:26,668 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:30:26,872 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:30:27,131 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 22:30:27,287 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:30:28,467 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:30:28,727 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:30:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:30,568 INFO L93 Difference]: Finished difference Result 2683 states and 6603 transitions. [2021-03-10 22:30:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:30:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:30:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:30,575 INFO L225 Difference]: With dead ends: 2683 [2021-03-10 22:30:30,575 INFO L226 Difference]: Without dead ends: 2663 [2021-03-10 22:30:30,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 3837.7ms TimeCoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:30:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-03-10 22:30:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 1037. [2021-03-10 22:30:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 2.3957528957528957) internal successors, (2482), 1036 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 2482 transitions. [2021-03-10 22:30:30,589 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 2482 transitions. Word has length 30 [2021-03-10 22:30:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:30,589 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 2482 transitions. [2021-03-10 22:30:30,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:30,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 2482 transitions. [2021-03-10 22:30:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:30,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:30,590 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:30,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:30,791 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:30,791 INFO L82 PathProgramCache]: Analyzing trace with hash 971090579, now seen corresponding path program 14 times [2021-03-10 22:30:30,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:30,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295280062] [2021-03-10 22:30:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:31,170 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:30:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:31,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295280062] [2021-03-10 22:30:31,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346320630] [2021-03-10 22:30:31,639 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:31,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:31,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:31,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:30:31,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:32,346 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-03-10 22:30:32,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-03-10 22:30:32,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:32,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:32,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:32,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:31 [2021-03-10 22:30:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:32,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:32,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-03-10 22:30:32,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111303544] [2021-03-10 22:30:32,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:30:32,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:32,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:30:32,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:30:32,720 INFO L87 Difference]: Start difference. First operand 1037 states and 2482 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:33,509 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-03-10 22:30:33,782 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 22:30:34,463 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 22:30:35,489 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 22:30:35,780 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-10 22:30:36,129 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-10 22:30:36,308 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 22:30:36,593 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 22:30:37,165 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:30:37,797 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 22:30:37,971 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:30:38,505 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 22:30:38,931 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:30:39,712 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:30:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:40,162 INFO L93 Difference]: Finished difference Result 2624 states and 6383 transitions. [2021-03-10 22:30:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 22:30:40,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-03-10 22:30:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:40,168 INFO L225 Difference]: With dead ends: 2624 [2021-03-10 22:30:40,168 INFO L226 Difference]: Without dead ends: 2604 [2021-03-10 22:30:40,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 6308.3ms TimeCoverageRelationStatistics Valid=672, Invalid=2988, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 22:30:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-03-10 22:30:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 1034. [2021-03-10 22:30:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.3969022265246855) internal successors, (2476), 1033 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2476 transitions. [2021-03-10 22:30:40,183 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2476 transitions. Word has length 30 [2021-03-10 22:30:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:40,183 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 2476 transitions. [2021-03-10 22:30:40,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:40,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2476 transitions. [2021-03-10 22:30:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:40,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:40,184 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:40,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-03-10 22:30:40,384 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:40,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:40,385 INFO L82 PathProgramCache]: Analyzing trace with hash -292888029, now seen corresponding path program 15 times [2021-03-10 22:30:40,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:40,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891286701] [2021-03-10 22:30:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891286701] [2021-03-10 22:30:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978435718] [2021-03-10 22:30:41,115 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:41,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:30:41,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:41,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:30:41,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:41,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:41,799 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 20 treesize of output 36 [2021-03-10 22:30:41,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:41,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:41,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:41,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-03-10 22:30:42,116 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 22:30:42,609 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 22:30:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:42,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:42,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 22:30:42,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296128052] [2021-03-10 22:30:42,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:30:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:30:42,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:30:42,738 INFO L87 Difference]: Start difference. First operand 1034 states and 2476 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:43,582 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 22:30:44,576 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 22:30:44,835 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:30:45,575 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 22:30:45,782 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:30:46,832 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-03-10 22:30:47,777 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-10 22:30:48,128 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-03-10 22:30:49,136 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 22:30:49,692 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:30:50,373 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:30:51,736 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:30:52,133 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 22:30:52,398 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-03-10 22:30:52,920 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 22:30:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:53,088 INFO L93 Difference]: Finished difference Result 2428 states and 5917 transitions. [2021-03-10 22:30:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:30:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-03-10 22:30:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:53,094 INFO L225 Difference]: With dead ends: 2428 [2021-03-10 22:30:53,094 INFO L226 Difference]: Without dead ends: 2417 [2021-03-10 22:30:53,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 8676.1ms TimeCoverageRelationStatistics Valid=562, Invalid=3098, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 22:30:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-03-10 22:30:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1055. [2021-03-10 22:30:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.4022770398481974) internal successors, (2532), 1054 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2532 transitions. [2021-03-10 22:30:53,107 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2532 transitions. Word has length 30 [2021-03-10 22:30:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:53,107 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2532 transitions. [2021-03-10 22:30:53,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2532 transitions. [2021-03-10 22:30:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:53,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:53,109 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:53,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:53,309 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1463513021, now seen corresponding path program 16 times [2021-03-10 22:30:53,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:53,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374941648] [2021-03-10 22:30:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:53,775 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:30:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:54,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374941648] [2021-03-10 22:30:54,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141590482] [2021-03-10 22:30:54,149 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:54,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:54,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:30:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:54,706 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:30:54,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-03-10 22:30:54,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:54,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:54,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:54,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-03-10 22:30:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:54,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:54,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:30:54,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356214583] [2021-03-10 22:30:54,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:54,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:54,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:54,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:54,810 INFO L87 Difference]: Start difference. First operand 1055 states and 2532 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:55,276 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:30:55,579 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-10 22:30:55,772 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:30:55,987 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 22:30:56,233 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 22:30:56,421 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:30:57,440 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 22:30:57,684 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 22:30:57,979 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:30:58,546 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 22:30:58,693 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:30:59,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:59,656 INFO L93 Difference]: Finished difference Result 2785 states and 6863 transitions. [2021-03-10 22:30:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:30:59,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:30:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:59,663 INFO L225 Difference]: With dead ends: 2785 [2021-03-10 22:30:59,663 INFO L226 Difference]: Without dead ends: 2765 [2021-03-10 22:30:59,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 4074.5ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:30:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-03-10 22:30:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 1055. [2021-03-10 22:30:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.398481973434535) internal successors, (2528), 1054 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2528 transitions. [2021-03-10 22:30:59,678 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2528 transitions. Word has length 30 [2021-03-10 22:30:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:59,678 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2528 transitions. [2021-03-10 22:30:59,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:59,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2528 transitions. [2021-03-10 22:30:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:59,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:59,680 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:59,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-03-10 22:30:59,880 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1998957229, now seen corresponding path program 17 times [2021-03-10 22:30:59,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:59,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170860258] [2021-03-10 22:30:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:00,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170860258] [2021-03-10 22:31:00,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314460296] [2021-03-10 22:31:00,707 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:00,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:31:00,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:00,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:31:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:01,307 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:31:01,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-03-10 22:31:01,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:01,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:01,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:01,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-03-10 22:31:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:01,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:01,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:31:01,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834300007] [2021-03-10 22:31:01,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:31:01,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:01,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:31:01,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:31:01,424 INFO L87 Difference]: Start difference. First operand 1055 states and 2528 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) [2021-03-10 22:31:02,251 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 22:31:02,530 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:31:02,790 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:31:02,979 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:31:03,190 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 22:31:04,236 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 22:31:04,455 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-10 22:31:04,826 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:31:05,074 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 22:31:05,508 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:31:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:06,757 INFO L93 Difference]: Finished difference Result 2362 states and 5759 transitions. [2021-03-10 22:31:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:31:06,760 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 30 [2021-03-10 22:31:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:06,763 INFO L225 Difference]: With dead ends: 2362 [2021-03-10 22:31:06,763 INFO L226 Difference]: Without dead ends: 2342 [2021-03-10 22:31:06,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 4120.7ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:31:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-03-10 22:31:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1055. [2021-03-10 22:31:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3975332068311195) internal successors, (2527), 1054 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2527 transitions. [2021-03-10 22:31:06,776 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2527 transitions. Word has length 30 [2021-03-10 22:31:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:06,776 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2527 transitions. [2021-03-10 22:31:06,776 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) [2021-03-10 22:31:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2527 transitions. [2021-03-10 22:31:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:06,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:06,777 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:06,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-03-10 22:31:06,978 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:06,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1891263929, now seen corresponding path program 18 times [2021-03-10 22:31:06,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:06,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090531978] [2021-03-10 22:31:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:07,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090531978] [2021-03-10 22:31:07,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345899792] [2021-03-10 22:31:07,695 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:07,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:31:07,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:07,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:31:07,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:08,327 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:31:08,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-03-10 22:31:08,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:08,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:08,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:08,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-03-10 22:31:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:08,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:08,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:31:08,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529013726] [2021-03-10 22:31:08,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:31:08,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:08,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:31:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:31:08,425 INFO L87 Difference]: Start difference. First operand 1055 states and 2527 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) [2021-03-10 22:31:09,111 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 22:31:09,374 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 22:31:09,600 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:31:09,789 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 22:31:09,998 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:31:11,158 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-10 22:31:11,486 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 22:31:11,950 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 22:31:12,176 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 22:31:12,603 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:31:12,910 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:31:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:14,432 INFO L93 Difference]: Finished difference Result 2407 states and 5867 transitions. [2021-03-10 22:31:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:31:14,435 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 30 [2021-03-10 22:31:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:14,438 INFO L225 Difference]: With dead ends: 2407 [2021-03-10 22:31:14,438 INFO L226 Difference]: Without dead ends: 2370 [2021-03-10 22:31:14,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3832.2ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:31:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-03-10 22:31:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1046. [2021-03-10 22:31:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.3942583732057416) internal successors, (2502), 1045 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 2502 transitions. [2021-03-10 22:31:14,451 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 2502 transitions. Word has length 30 [2021-03-10 22:31:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:14,451 INFO L480 AbstractCegarLoop]: Abstraction has 1046 states and 2502 transitions. [2021-03-10 22:31:14,451 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) [2021-03-10 22:31:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 2502 transitions. [2021-03-10 22:31:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:14,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:14,452 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:14,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:14,654 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1162356301, now seen corresponding path program 19 times [2021-03-10 22:31:14,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:14,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142468506] [2021-03-10 22:31:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:15,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142468506] [2021-03-10 22:31:15,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379859938] [2021-03-10 22:31:15,317 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:15,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:31:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:15,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:31:15,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:15,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:15,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:15,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-03-10 22:31:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:15,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:15,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:31:15,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315896018] [2021-03-10 22:31:15,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:15,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:15,898 INFO L87 Difference]: Start difference. First operand 1046 states and 2502 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:16,378 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:31:16,911 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:31:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:19,183 INFO L93 Difference]: Finished difference Result 2617 states and 6419 transitions. [2021-03-10 22:31:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:31:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:31:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:19,190 INFO L225 Difference]: With dead ends: 2617 [2021-03-10 22:31:19,190 INFO L226 Difference]: Without dead ends: 2606 [2021-03-10 22:31:19,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2430.0ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:31:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-03-10 22:31:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1080. [2021-03-10 22:31:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.4040778498609825) internal successors, (2594), 1079 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2594 transitions. [2021-03-10 22:31:19,212 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2594 transitions. Word has length 30 [2021-03-10 22:31:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:19,212 INFO L480 AbstractCegarLoop]: Abstraction has 1080 states and 2594 transitions. [2021-03-10 22:31:19,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2594 transitions. [2021-03-10 22:31:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:19,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:19,213 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:19,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:19,423 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash 594044749, now seen corresponding path program 20 times [2021-03-10 22:31:19,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:19,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413335910] [2021-03-10 22:31:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:20,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413335910] [2021-03-10 22:31:20,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143440998] [2021-03-10 22:31:20,028 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:20,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:20,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:31:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:20,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:20,630 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-03-10 22:31:20,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:20,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:20,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:20,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 22:31:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:20,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:20,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-03-10 22:31:20,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803176985] [2021-03-10 22:31:20,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:31:20,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:31:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:31:20,983 INFO L87 Difference]: Start difference. First operand 1080 states and 2594 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:21,425 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:31:21,959 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 22:31:22,164 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:31:23,937 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:31:25,206 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 22:31:25,475 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 22:31:25,637 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 22:31:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:26,724 INFO L93 Difference]: Finished difference Result 2728 states and 6740 transitions. [2021-03-10 22:31:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:31:26,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:31:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:26,730 INFO L225 Difference]: With dead ends: 2728 [2021-03-10 22:31:26,730 INFO L226 Difference]: Without dead ends: 2716 [2021-03-10 22:31:26,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 3608.5ms TimeCoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:31:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-03-10 22:31:26,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 1115. [2021-03-10 22:31:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.4093357271095153) internal successors, (2684), 1114 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2684 transitions. [2021-03-10 22:31:26,751 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2684 transitions. Word has length 30 [2021-03-10 22:31:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:26,751 INFO L480 AbstractCegarLoop]: Abstraction has 1115 states and 2684 transitions. [2021-03-10 22:31:26,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2684 transitions. [2021-03-10 22:31:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:26,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:26,753 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:26,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-03-10 22:31:26,967 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash -323905441, now seen corresponding path program 21 times [2021-03-10 22:31:26,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:26,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969789996] [2021-03-10 22:31:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:27,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969789996] [2021-03-10 22:31:27,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46595788] [2021-03-10 22:31:27,722 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:27,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:31:27,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:27,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:31:27,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:28,297 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:31:28,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-03-10 22:31:28,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:28,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:28,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:28,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-03-10 22:31:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:28,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:28,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:31:28,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410657875] [2021-03-10 22:31:28,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:31:28,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:31:28,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:31:28,451 INFO L87 Difference]: Start difference. First operand 1115 states and 2684 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) [2021-03-10 22:31:28,852 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:31:29,059 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:31:29,381 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 22:31:29,541 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 22:31:29,800 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:31:31,223 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:31:31,536 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:31:32,044 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:31:32,774 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:31:33,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:33,320 INFO L93 Difference]: Finished difference Result 3078 states and 7561 transitions. [2021-03-10 22:31:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:31:33,323 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 30 [2021-03-10 22:31:33,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:33,327 INFO L225 Difference]: With dead ends: 3078 [2021-03-10 22:31:33,327 INFO L226 Difference]: Without dead ends: 3056 [2021-03-10 22:31:33,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 3830.4ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:31:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-03-10 22:31:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1069. [2021-03-10 22:31:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.397003745318352) internal successors, (2560), 1068 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 2560 transitions. [2021-03-10 22:31:33,342 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 2560 transitions. Word has length 30 [2021-03-10 22:31:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:33,342 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 2560 transitions. [2021-03-10 22:31:33,343 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) [2021-03-10 22:31:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 2560 transitions. [2021-03-10 22:31:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:33,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:33,344 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:33,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:33,544 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1129488957, now seen corresponding path program 22 times [2021-03-10 22:31:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:33,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663086279] [2021-03-10 22:31:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:34,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663086279] [2021-03-10 22:31:34,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008079079] [2021-03-10 22:31:34,178 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:34,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:34,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:34,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:31:34,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:34,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:34,905 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-03-10 22:31:34,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:34,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:34,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:34,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 22:31:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:35,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:35,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-03-10 22:31:35,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223209665] [2021-03-10 22:31:35,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:31:35,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:31:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:31:35,250 INFO L87 Difference]: Start difference. First operand 1069 states and 2560 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:35,755 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 22:31:36,012 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 22:31:36,714 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 22:31:37,054 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 22:31:37,265 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:31:37,705 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 22:31:38,617 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 22:31:39,100 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:31:39,334 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 22:31:39,931 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 22:31:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:40,457 INFO L93 Difference]: Finished difference Result 2640 states and 6425 transitions. [2021-03-10 22:31:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:31:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-03-10 22:31:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:40,463 INFO L225 Difference]: With dead ends: 2640 [2021-03-10 22:31:40,463 INFO L226 Difference]: Without dead ends: 2620 [2021-03-10 22:31:40,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 4290.0ms TimeCoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:31:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-03-10 22:31:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1087. [2021-03-10 22:31:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.3996316758747698) internal successors, (2606), 1086 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2606 transitions. [2021-03-10 22:31:40,483 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2606 transitions. Word has length 30 [2021-03-10 22:31:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:40,483 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 2606 transitions. [2021-03-10 22:31:40,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2606 transitions. [2021-03-10 22:31:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:40,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:40,485 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:40,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-03-10 22:31:40,687 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:40,688 INFO L82 PathProgramCache]: Analyzing trace with hash -508083499, now seen corresponding path program 23 times [2021-03-10 22:31:40,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:40,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534043875] [2021-03-10 22:31:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:41,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534043875] [2021-03-10 22:31:41,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937740416] [2021-03-10 22:31:41,410 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:41,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:31:41,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:41,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:31:41,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:41,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:31:41,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:41,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:41,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:41,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-03-10 22:31:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:42,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:42,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:31:42,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958443046] [2021-03-10 22:31:42,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:31:42,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:42,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:31:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:31:42,047 INFO L87 Difference]: Start difference. First operand 1087 states and 2606 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) [2021-03-10 22:31:42,692 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 22:31:42,877 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:31:43,846 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 22:31:44,053 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 22:31:44,332 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:31:45,144 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:31:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:46,247 INFO L93 Difference]: Finished difference Result 2559 states and 6212 transitions. [2021-03-10 22:31:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:31:46,249 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 30 [2021-03-10 22:31:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:46,252 INFO L225 Difference]: With dead ends: 2559 [2021-03-10 22:31:46,252 INFO L226 Difference]: Without dead ends: 2522 [2021-03-10 22:31:46,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2828.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:31:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-03-10 22:31:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1072. [2021-03-10 22:31:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 2.3940242763772175) internal successors, (2564), 1071 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 2564 transitions. [2021-03-10 22:31:46,267 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 2564 transitions. Word has length 30 [2021-03-10 22:31:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:46,267 INFO L480 AbstractCegarLoop]: Abstraction has 1072 states and 2564 transitions. [2021-03-10 22:31:46,267 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) [2021-03-10 22:31:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 2564 transitions. [2021-03-10 22:31:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:46,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:46,268 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:46,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:46,469 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2141487853, now seen corresponding path program 24 times [2021-03-10 22:31:46,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:46,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496035417] [2021-03-10 22:31:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:47,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496035417] [2021-03-10 22:31:47,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429699723] [2021-03-10 22:31:47,183 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:47,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:31:47,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:47,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:31:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:47,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:31:47,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:47,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:47,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:47,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-03-10 22:31:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:47,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:47,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:31:47,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677417841] [2021-03-10 22:31:47,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:31:47,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:31:47,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:31:47,777 INFO L87 Difference]: Start difference. First operand 1072 states and 2564 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) [2021-03-10 22:31:48,456 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 22:31:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:51,275 INFO L93 Difference]: Finished difference Result 2441 states and 5944 transitions. [2021-03-10 22:31:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:31:51,277 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 30 [2021-03-10 22:31:51,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:51,280 INFO L225 Difference]: With dead ends: 2441 [2021-03-10 22:31:51,280 INFO L226 Difference]: Without dead ends: 2431 [2021-03-10 22:31:51,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2065.4ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:31:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-03-10 22:31:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1069. [2021-03-10 22:31:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.394194756554307) internal successors, (2557), 1068 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) [2021-03-10 22:31:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 2557 transitions. [2021-03-10 22:31:51,292 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 2557 transitions. Word has length 30 [2021-03-10 22:31:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:51,292 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 2557 transitions. [2021-03-10 22:31:51,292 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) [2021-03-10 22:31:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 2557 transitions. [2021-03-10 22:31:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:51,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:51,294 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:51,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2021-03-10 22:31:51,495 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1543469255, now seen corresponding path program 1 times [2021-03-10 22:31:51,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:51,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018377455] [2021-03-10 22:31:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:52,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018377455] [2021-03-10 22:31:52,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602562902] [2021-03-10 22:31:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:52,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:31:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:52,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:31:52,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:52,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:52,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:52,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:31:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:52,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:52,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:31:52,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073997455] [2021-03-10 22:31:52,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:31:52,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:52,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:31:52,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:31:52,784 INFO L87 Difference]: Start difference. First operand 1069 states and 2557 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,964 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:31:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:55,626 INFO L93 Difference]: Finished difference Result 2495 states and 6071 transitions. [2021-03-10 22:31:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:55,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:31:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:55,631 INFO L225 Difference]: With dead ends: 2495 [2021-03-10 22:31:55,631 INFO L226 Difference]: Without dead ends: 2485 [2021-03-10 22:31:55,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2103.9ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:31:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-03-10 22:31:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1113. [2021-03-10 22:31:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.3857913669064748) internal successors, (2653), 1112 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2653 transitions. [2021-03-10 22:31:55,646 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2653 transitions. Word has length 30 [2021-03-10 22:31:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:55,646 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 2653 transitions. [2021-03-10 22:31:55,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2653 transitions. [2021-03-10 22:31:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:55,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:55,647 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:55,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:55,851 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:55,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:55,851 INFO L82 PathProgramCache]: Analyzing trace with hash 334113745, now seen corresponding path program 2 times [2021-03-10 22:31:55,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:55,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969965956] [2021-03-10 22:31:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:56,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969965956] [2021-03-10 22:31:56,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004044171] [2021-03-10 22:31:56,627 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:56,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:56,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:56,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:31:56,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:57,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:31:57,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:57,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:57,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:57,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:31:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:57,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:57,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:31:57,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545493230] [2021-03-10 22:31:57,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:57,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:57,163 INFO L87 Difference]: Start difference. First operand 1113 states and 2653 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:58,197 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:32:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:01,177 INFO L93 Difference]: Finished difference Result 2679 states and 6535 transitions. [2021-03-10 22:32:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:32:01,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:01,184 INFO L225 Difference]: With dead ends: 2679 [2021-03-10 22:32:01,184 INFO L226 Difference]: Without dead ends: 2668 [2021-03-10 22:32:01,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2425.4ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:32:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-03-10 22:32:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 1142. [2021-03-10 22:32:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.3961437335670466) internal successors, (2734), 1141 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 2734 transitions. [2021-03-10 22:32:01,200 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 2734 transitions. Word has length 30 [2021-03-10 22:32:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:01,200 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 2734 transitions. [2021-03-10 22:32:01,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 2734 transitions. [2021-03-10 22:32:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:01,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:01,201 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:01,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-03-10 22:32:01,402 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2090514795, now seen corresponding path program 3 times [2021-03-10 22:32:01,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:01,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168922906] [2021-03-10 22:32:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:02,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168922906] [2021-03-10 22:32:02,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889780988] [2021-03-10 22:32:02,227 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 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 [2021-03-10 22:32:02,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:02,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:02,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:32:02,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:03,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:03,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:03,172 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 15 [2021-03-10 22:32:03,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:03,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:03,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:03,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:14 [2021-03-10 22:32:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:03,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:03,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-03-10 22:32:03,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338281269] [2021-03-10 22:32:03,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:32:03,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:32:03,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:03,304 INFO L87 Difference]: Start difference. First operand 1142 states and 2734 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:03,960 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:32:04,496 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:32:05,483 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 22:32:05,919 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:32:06,142 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 22:32:06,584 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:32:07,891 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 22:32:08,562 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:32:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:09,177 INFO L93 Difference]: Finished difference Result 2744 states and 6725 transitions. [2021-03-10 22:32:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:32:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:09,183 INFO L225 Difference]: With dead ends: 2744 [2021-03-10 22:32:09,183 INFO L226 Difference]: Without dead ends: 2732 [2021-03-10 22:32:09,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 4101.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:32:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-03-10 22:32:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1147. [2021-03-10 22:32:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.391797556719023) internal successors, (2741), 1146 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2741 transitions. [2021-03-10 22:32:09,200 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2741 transitions. Word has length 30 [2021-03-10 22:32:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:09,200 INFO L480 AbstractCegarLoop]: Abstraction has 1147 states and 2741 transitions. [2021-03-10 22:32:09,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2741 transitions. [2021-03-10 22:32:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:09,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:09,202 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:09,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-03-10 22:32:09,415 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:09,415 INFO L82 PathProgramCache]: Analyzing trace with hash 519174883, now seen corresponding path program 4 times [2021-03-10 22:32:09,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:09,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136892850] [2021-03-10 22:32:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:10,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136892850] [2021-03-10 22:32:10,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603424366] [2021-03-10 22:32:10,120 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 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 [2021-03-10 22:32:10,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:10,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:10,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:32:10,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:10,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:32:10,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:10,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:10,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:10,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:32:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:10,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:10,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:32:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371699137] [2021-03-10 22:32:10,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:32:10,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:10,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:32:10,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:10,781 INFO L87 Difference]: Start difference. First operand 1147 states and 2741 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) [2021-03-10 22:32:11,584 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:32:12,316 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:32:13,056 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:32:13,354 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:32:15,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:15,353 INFO L93 Difference]: Finished difference Result 2662 states and 6457 transitions. [2021-03-10 22:32:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:32:15,356 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 30 [2021-03-10 22:32:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:15,358 INFO L225 Difference]: With dead ends: 2662 [2021-03-10 22:32:15,358 INFO L226 Difference]: Without dead ends: 2640 [2021-03-10 22:32:15,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2716.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:32:15,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-03-10 22:32:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1144. [2021-03-10 22:32:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 2.391076115485564) internal successors, (2733), 1143 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 2733 transitions. [2021-03-10 22:32:15,372 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 2733 transitions. Word has length 30 [2021-03-10 22:32:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:15,372 INFO L480 AbstractCegarLoop]: Abstraction has 1144 states and 2733 transitions. [2021-03-10 22:32:15,372 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) [2021-03-10 22:32:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 2733 transitions. [2021-03-10 22:32:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:15,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:15,373 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:15,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-03-10 22:32:15,574 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash -794070141, now seen corresponding path program 5 times [2021-03-10 22:32:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:15,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66527468] [2021-03-10 22:32:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:16,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66527468] [2021-03-10 22:32:16,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971097308] [2021-03-10 22:32:16,351 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 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 [2021-03-10 22:32:16,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:16,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:16,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:32:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:32:16,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:16,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:16,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:16,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:32:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:17,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:17,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:32:17,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289999166] [2021-03-10 22:32:17,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:32:17,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:17,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:32:17,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:17,048 INFO L87 Difference]: Start difference. First operand 1144 states and 2733 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) [2021-03-10 22:32:18,500 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:32:20,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:20,714 INFO L93 Difference]: Finished difference Result 2481 states and 6044 transitions. [2021-03-10 22:32:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:20,717 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 30 [2021-03-10 22:32:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:20,720 INFO L225 Difference]: With dead ends: 2481 [2021-03-10 22:32:20,720 INFO L226 Difference]: Without dead ends: 2471 [2021-03-10 22:32:20,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2363.1ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:32:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-03-10 22:32:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1143. [2021-03-10 22:32:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.3914185639229424) internal successors, (2731), 1142 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2731 transitions. [2021-03-10 22:32:20,735 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2731 transitions. Word has length 30 [2021-03-10 22:32:20,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:20,735 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2731 transitions. [2021-03-10 22:32:20,735 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) [2021-03-10 22:32:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2731 transitions. [2021-03-10 22:32:20,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:20,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:20,736 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:20,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:20,937 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1395219345, now seen corresponding path program 6 times [2021-03-10 22:32:20,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:20,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998084353] [2021-03-10 22:32:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:21,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998084353] [2021-03-10 22:32:21,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926430068] [2021-03-10 22:32:21,722 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 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 [2021-03-10 22:32:21,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:32:21,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:21,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:22,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:22,351 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:32:22,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:22,524 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 22:32:22,526 INFO L628 ElimStorePlain]: treesize reduction 8, result has 86.7 percent of original size [2021-03-10 22:32:22,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:22,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:52 [2021-03-10 22:32:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:22,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:22,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-03-10 22:32:22,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123757026] [2021-03-10 22:32:22,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:32:22,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:32:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:32:22,988 INFO L87 Difference]: Start difference. First operand 1143 states and 2731 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:23,292 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:32:23,502 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:32:23,697 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:32:23,939 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-03-10 22:32:25,127 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:32:25,683 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:32:26,085 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 22:32:26,260 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:32:26,824 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:32:27,107 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:32:27,932 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 22:32:28,108 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:32:28,876 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 22:32:29,300 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:32:29,544 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:32:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:29,850 INFO L93 Difference]: Finished difference Result 3296 states and 8051 transitions. [2021-03-10 22:32:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:32:29,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-03-10 22:32:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:29,857 INFO L225 Difference]: With dead ends: 3296 [2021-03-10 22:32:29,857 INFO L226 Difference]: Without dead ends: 3282 [2021-03-10 22:32:29,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 5733.1ms TimeCoverageRelationStatistics Valid=548, Invalid=2002, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:32:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-03-10 22:32:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1136. [2021-03-10 22:32:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.388546255506608) internal successors, (2711), 1135 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 2711 transitions. [2021-03-10 22:32:29,875 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 2711 transitions. Word has length 30 [2021-03-10 22:32:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:29,875 INFO L480 AbstractCegarLoop]: Abstraction has 1136 states and 2711 transitions. [2021-03-10 22:32:29,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 2711 transitions. [2021-03-10 22:32:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:29,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:29,876 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:30,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:30,076 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash 316882413, now seen corresponding path program 7 times [2021-03-10 22:32:30,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:30,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913147180] [2021-03-10 22:32:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:30,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913147180] [2021-03-10 22:32:30,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928382156] [2021-03-10 22:32:30,882 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 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 [2021-03-10 22:32:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:30,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:32:30,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:32:31,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:31,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:31,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:31,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:32:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:31,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:31,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:32:31,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606907883] [2021-03-10 22:32:31,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:32:31,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:32:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:31,605 INFO L87 Difference]: Start difference. First operand 1136 states and 2711 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) [2021-03-10 22:32:33,224 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:32:33,615 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:32:34,161 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:32:34,572 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:32:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:35,926 INFO L93 Difference]: Finished difference Result 2703 states and 6567 transitions. [2021-03-10 22:32:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:32:35,929 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 30 [2021-03-10 22:32:35,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:35,932 INFO L225 Difference]: With dead ends: 2703 [2021-03-10 22:32:35,932 INFO L226 Difference]: Without dead ends: 2685 [2021-03-10 22:32:35,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2845.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:32:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-03-10 22:32:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1113. [2021-03-10 22:32:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.3857913669064748) internal successors, (2653), 1112 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2653 transitions. [2021-03-10 22:32:35,946 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2653 transitions. Word has length 30 [2021-03-10 22:32:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:35,946 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 2653 transitions. [2021-03-10 22:32:35,946 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) [2021-03-10 22:32:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2653 transitions. [2021-03-10 22:32:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:35,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:35,947 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:36,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-03-10 22:32:36,148 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2074262811, now seen corresponding path program 8 times [2021-03-10 22:32:36,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:36,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083990883] [2021-03-10 22:32:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:36,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083990883] [2021-03-10 22:32:36,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292478882] [2021-03-10 22:32:36,881 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 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 [2021-03-10 22:32:36,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:36,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:36,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:36,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:37,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:37,532 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:32:37,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:37,719 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:32:37,720 INFO L628 ElimStorePlain]: treesize reduction 10, result has 84.8 percent of original size [2021-03-10 22:32:37,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:37,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-03-10 22:32:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:38,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:38,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-03-10 22:32:38,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086119151] [2021-03-10 22:32:38,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:32:38,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:38,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:32:38,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:38,100 INFO L87 Difference]: Start difference. First operand 1113 states and 2653 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:38,534 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:32:38,757 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:32:39,469 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 22:32:40,043 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 22:32:40,276 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 22:32:40,619 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:32:41,175 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-10 22:32:41,518 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:32:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:42,680 INFO L93 Difference]: Finished difference Result 2536 states and 6200 transitions. [2021-03-10 22:32:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:32:42,683 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:42,685 INFO L225 Difference]: With dead ends: 2536 [2021-03-10 22:32:42,685 INFO L226 Difference]: Without dead ends: 2525 [2021-03-10 22:32:42,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 3701.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:32:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-03-10 22:32:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1143. [2021-03-10 22:32:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.3957968476357268) internal successors, (2736), 1142 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2736 transitions. [2021-03-10 22:32:42,699 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2736 transitions. Word has length 30 [2021-03-10 22:32:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:42,699 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2736 transitions. [2021-03-10 22:32:42,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2736 transitions. [2021-03-10 22:32:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:42,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:42,700 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:42,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-03-10 22:32:42,900 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash -317861761, now seen corresponding path program 9 times [2021-03-10 22:32:42,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:42,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480903740] [2021-03-10 22:32:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:43,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480903740] [2021-03-10 22:32:43,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772866251] [2021-03-10 22:32:43,531 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 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 [2021-03-10 22:32:43,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:43,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:43,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:32:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:44,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:32:44,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:44,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:44,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:44,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:32:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:44,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:44,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:32:44,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534563432] [2021-03-10 22:32:44,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:32:44,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:44,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:32:44,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:44,176 INFO L87 Difference]: Start difference. First operand 1143 states and 2736 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:44,687 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:32:44,934 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:32:45,737 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:32:46,184 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:32:46,359 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:32:46,935 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:32:48,073 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:32:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:48,895 INFO L93 Difference]: Finished difference Result 2860 states and 7020 transitions. [2021-03-10 22:32:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:32:48,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:48,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:48,901 INFO L225 Difference]: With dead ends: 2860 [2021-03-10 22:32:48,901 INFO L226 Difference]: Without dead ends: 2840 [2021-03-10 22:32:48,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3115.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:32:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-03-10 22:32:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 1132. [2021-03-10 22:32:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 2.3890362511052166) internal successors, (2702), 1131 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 2702 transitions. [2021-03-10 22:32:48,921 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 2702 transitions. Word has length 30 [2021-03-10 22:32:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:48,921 INFO L480 AbstractCegarLoop]: Abstraction has 1132 states and 2702 transitions. [2021-03-10 22:32:48,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 2702 transitions. [2021-03-10 22:32:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:48,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:48,922 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:49,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:49,122 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:49,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:49,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1889201673, now seen corresponding path program 10 times [2021-03-10 22:32:49,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:49,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547179680] [2021-03-10 22:32:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:49,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547179680] [2021-03-10 22:32:49,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936422110] [2021-03-10 22:32:49,902 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 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 [2021-03-10 22:32:49,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:49,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:49,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:32:49,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:50,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:32:50,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:50,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:50,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:50,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:32:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:50,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:32:50,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945535924] [2021-03-10 22:32:50,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:32:50,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:50,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:32:50,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:50,640 INFO L87 Difference]: Start difference. First operand 1132 states and 2702 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) [2021-03-10 22:32:51,725 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:32:52,154 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:32:52,509 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:32:52,710 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:32:53,050 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:32:53,476 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:32:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:54,633 INFO L93 Difference]: Finished difference Result 2611 states and 6343 transitions. [2021-03-10 22:32:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:32:54,637 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 30 [2021-03-10 22:32:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:54,639 INFO L225 Difference]: With dead ends: 2611 [2021-03-10 22:32:54,639 INFO L226 Difference]: Without dead ends: 2588 [2021-03-10 22:32:54,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3035.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:32:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-03-10 22:32:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1117. [2021-03-10 22:32:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.3853046594982077) internal successors, (2662), 1116 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 2662 transitions. [2021-03-10 22:32:54,654 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 2662 transitions. Word has length 30 [2021-03-10 22:32:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:54,654 INFO L480 AbstractCegarLoop]: Abstraction has 1117 states and 2662 transitions. [2021-03-10 22:32:54,654 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) [2021-03-10 22:32:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 2662 transitions. [2021-03-10 22:32:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:54,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:54,656 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:54,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-03-10 22:32:54,867 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:54,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1092520599, now seen corresponding path program 11 times [2021-03-10 22:32:54,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:54,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274816974] [2021-03-10 22:32:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:55,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274816974] [2021-03-10 22:32:55,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49887777] [2021-03-10 22:32:55,683 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 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 [2021-03-10 22:32:55,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:55,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:32:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:32:56,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:56,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:56,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:56,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:32:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:56,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:56,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:32:56,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361436158] [2021-03-10 22:32:56,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:32:56,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:32:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:56,439 INFO L87 Difference]: Start difference. First operand 1117 states and 2662 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) [2021-03-10 22:32:57,974 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:32:58,174 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:32:59,491 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 22:33:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:00,061 INFO L93 Difference]: Finished difference Result 2448 states and 5966 transitions. [2021-03-10 22:33:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:00,065 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 30 [2021-03-10 22:33:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:00,067 INFO L225 Difference]: With dead ends: 2448 [2021-03-10 22:33:00,068 INFO L226 Difference]: Without dead ends: 2438 [2021-03-10 22:33:00,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2621.9ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:33:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-03-10 22:33:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1114. [2021-03-10 22:33:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.38544474393531) internal successors, (2655), 1113 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 2655 transitions. [2021-03-10 22:33:00,082 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 2655 transitions. Word has length 30 [2021-03-10 22:33:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:00,082 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 2655 transitions. [2021-03-10 22:33:00,082 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) [2021-03-10 22:33:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 2655 transitions. [2021-03-10 22:33:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:00,083 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:00,083 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:00,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:00,283 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1905442861, now seen corresponding path program 12 times [2021-03-10 22:33:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:00,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928711055] [2021-03-10 22:33:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:00,788 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:33:00,973 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:33:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:01,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928711055] [2021-03-10 22:33:01,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920960258] [2021-03-10 22:33:01,281 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 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 [2021-03-10 22:33:01,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:33:01,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:01,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:01,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:01,945 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:33:01,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:33:02,141 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:33:02,143 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.2 percent of original size [2021-03-10 22:33:02,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:02,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:60 [2021-03-10 22:33:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:02,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:02,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-03-10 22:33:02,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301972289] [2021-03-10 22:33:02,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:33:02,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:02,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:33:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:33:02,532 INFO L87 Difference]: Start difference. First operand 1114 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:02,974 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:33:03,948 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 22:33:04,558 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 22:33:04,836 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 22:33:05,201 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:33:05,872 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 22:33:06,156 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:33:06,449 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:33:06,706 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:33:07,077 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-10 22:33:07,580 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 22:33:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:08,700 INFO L93 Difference]: Finished difference Result 2507 states and 6111 transitions. [2021-03-10 22:33:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:33:08,703 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:08,705 INFO L225 Difference]: With dead ends: 2507 [2021-03-10 22:33:08,705 INFO L226 Difference]: Without dead ends: 2496 [2021-03-10 22:33:08,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 5206.9ms TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:33:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-03-10 22:33:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1135. [2021-03-10 22:33:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 2.3915343915343916) internal successors, (2712), 1134 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 2712 transitions. [2021-03-10 22:33:08,719 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 2712 transitions. Word has length 30 [2021-03-10 22:33:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:08,719 INFO L480 AbstractCegarLoop]: Abstraction has 1135 states and 2712 transitions. [2021-03-10 22:33:08,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:08,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 2712 transitions. [2021-03-10 22:33:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:08,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:08,720 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:08,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-03-10 22:33:08,921 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash -633123385, now seen corresponding path program 13 times [2021-03-10 22:33:08,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:08,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959422938] [2021-03-10 22:33:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:09,446 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:33:09,634 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:33:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:09,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959422938] [2021-03-10 22:33:09,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630344025] [2021-03-10 22:33:09,939 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 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 [2021-03-10 22:33:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:09,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:33:09,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:10,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:33:10,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:10,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:10,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:10,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:33:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:10,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:10,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:33:10,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951858624] [2021-03-10 22:33:10,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:33:10,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:33:10,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:10,646 INFO L87 Difference]: Start difference. First operand 1135 states and 2712 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:11,214 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:33:11,989 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:33:12,384 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:33:12,595 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:33:13,171 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:33:13,599 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:33:13,849 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:33:14,064 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:33:14,611 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:33:14,761 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-03-10 22:33:15,073 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 22:33:15,312 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:33:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:15,894 INFO L93 Difference]: Finished difference Result 2762 states and 6791 transitions. [2021-03-10 22:33:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:33:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:15,900 INFO L225 Difference]: With dead ends: 2762 [2021-03-10 22:33:15,900 INFO L226 Difference]: Without dead ends: 2742 [2021-03-10 22:33:15,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 4383.4ms TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:33:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-03-10 22:33:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 1126. [2021-03-10 22:33:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 2.3866666666666667) internal successors, (2685), 1125 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 2685 transitions. [2021-03-10 22:33:15,915 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 2685 transitions. Word has length 30 [2021-03-10 22:33:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:15,915 INFO L480 AbstractCegarLoop]: Abstraction has 1126 states and 2685 transitions. [2021-03-10 22:33:15,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 2685 transitions. [2021-03-10 22:33:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:15,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:15,916 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:16,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:16,116 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash 895830683, now seen corresponding path program 14 times [2021-03-10 22:33:16,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:16,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027468638] [2021-03-10 22:33:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:16,656 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:33:16,845 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:33:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:17,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027468638] [2021-03-10 22:33:17,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519585415] [2021-03-10 22:33:17,138 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 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 [2021-03-10 22:33:17,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:17,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:17,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:17,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:17,792 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-10 22:33:17,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:17,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:17,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:17,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-03-10 22:33:18,168 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 22:33:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:18,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:18,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-03-10 22:33:18,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347867004] [2021-03-10 22:33:18,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:33:18,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:18,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:33:18,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:33:18,270 INFO L87 Difference]: Start difference. First operand 1126 states and 2685 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:19,304 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-10 22:33:19,793 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:33:20,191 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 22:33:20,603 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:33:20,960 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 22:33:21,444 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 22:33:21,627 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:33:22,032 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:33:22,230 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:33:22,591 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:33:22,848 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:33:23,020 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 22:33:23,186 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 22:33:23,570 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 22:33:23,751 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:33:23,940 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-03-10 22:33:24,587 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 22:33:24,847 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:33:25,207 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:33:25,502 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:33:25,856 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 22:33:26,323 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:33:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:26,825 INFO L93 Difference]: Finished difference Result 2744 states and 6684 transitions. [2021-03-10 22:33:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:33:26,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-03-10 22:33:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:26,830 INFO L225 Difference]: With dead ends: 2744 [2021-03-10 22:33:26,830 INFO L226 Difference]: Without dead ends: 2724 [2021-03-10 22:33:26,830 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 7204.1ms TimeCoverageRelationStatistics Valid=576, Invalid=2076, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:33:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-03-10 22:33:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1117. [2021-03-10 22:33:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.3853046594982077) internal successors, (2662), 1116 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 2662 transitions. [2021-03-10 22:33:26,843 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 2662 transitions. Word has length 30 [2021-03-10 22:33:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:26,843 INFO L480 AbstractCegarLoop]: Abstraction has 1117 states and 2662 transitions. [2021-03-10 22:33:26,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 2662 transitions. [2021-03-10 22:33:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:26,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:26,844 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:27,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-03-10 22:33:27,045 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash 578985487, now seen corresponding path program 15 times [2021-03-10 22:33:27,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:27,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242525237] [2021-03-10 22:33:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:27,590 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:33:27,746 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:33:27,911 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:33:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:28,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242525237] [2021-03-10 22:33:28,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859318933] [2021-03-10 22:33:28,196 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 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 [2021-03-10 22:33:28,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:33:28,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:28,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:28,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:28,835 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 20 treesize of output 36 [2021-03-10 22:33:28,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:28,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:28,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:28,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-03-10 22:33:29,664 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 22:33:30,094 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:33:30,820 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 22:33:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:30,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:30,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 22:33:30,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948434414] [2021-03-10 22:33:30,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:33:30,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:30,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:33:30,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:33:30,926 INFO L87 Difference]: Start difference. First operand 1117 states and 2662 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:31,113 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-03-10 22:33:31,377 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 20 [2021-03-10 22:33:31,717 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:33:32,223 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-10 22:33:33,028 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 18 [2021-03-10 22:33:33,428 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 22:33:33,744 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:33:34,385 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 22:33:35,655 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-03-10 22:33:36,195 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-03-10 22:33:37,404 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-03-10 22:33:37,776 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:33:38,736 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-10 22:33:39,397 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 22:33:39,819 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:33:40,771 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-03-10 22:33:41,668 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:33:42,234 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-03-10 22:33:42,703 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-03-10 22:33:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:42,953 INFO L93 Difference]: Finished difference Result 2397 states and 5857 transitions. [2021-03-10 22:33:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:33:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-03-10 22:33:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:42,959 INFO L225 Difference]: With dead ends: 2397 [2021-03-10 22:33:42,959 INFO L226 Difference]: Without dead ends: 2386 [2021-03-10 22:33:42,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 11095.6ms TimeCoverageRelationStatistics Valid=421, Invalid=2441, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:33:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-03-10 22:33:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1127. [2021-03-10 22:33:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.3889875666074603) internal successors, (2690), 1126 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 2690 transitions. [2021-03-10 22:33:42,973 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 2690 transitions. Word has length 30 [2021-03-10 22:33:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:42,973 INFO L480 AbstractCegarLoop]: Abstraction has 1127 states and 2690 transitions. [2021-03-10 22:33:42,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 2690 transitions. [2021-03-10 22:33:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:42,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:42,974 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:43,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:43,174 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:43,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1959580759, now seen corresponding path program 16 times [2021-03-10 22:33:43,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:43,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163954704] [2021-03-10 22:33:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:43,899 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:33:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:44,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163954704] [2021-03-10 22:33:44,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706541955] [2021-03-10 22:33:44,190 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 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 [2021-03-10 22:33:44,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:44,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:44,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:33:44,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:44,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:33:44,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:44,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:44,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:44,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:33:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:44,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:44,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:33:44,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094919139] [2021-03-10 22:33:44,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:33:44,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:44,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:33:44,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:44,920 INFO L87 Difference]: Start difference. First operand 1127 states and 2690 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:45,617 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:33:45,870 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:33:46,144 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:33:46,923 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 22:33:47,246 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 22:33:47,755 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:33:48,133 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 22:33:48,904 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:33:49,391 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 22:33:49,708 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:33:50,061 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:33:50,745 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 22:33:51,114 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:33:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:51,571 INFO L93 Difference]: Finished difference Result 2757 states and 6773 transitions. [2021-03-10 22:33:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:33:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:51,578 INFO L225 Difference]: With dead ends: 2757 [2021-03-10 22:33:51,578 INFO L226 Difference]: Without dead ends: 2737 [2021-03-10 22:33:51,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 5345.7ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:33:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-03-10 22:33:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 1120. [2021-03-10 22:33:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.385165326184093) internal successors, (2669), 1119 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2669 transitions. [2021-03-10 22:33:51,594 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2669 transitions. Word has length 30 [2021-03-10 22:33:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:51,594 INFO L480 AbstractCegarLoop]: Abstraction has 1120 states and 2669 transitions. [2021-03-10 22:33:51,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2669 transitions. [2021-03-10 22:33:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:51,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:51,595 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:51,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-03-10 22:33:51,795 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:51,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1735151381, now seen corresponding path program 17 times [2021-03-10 22:33:51,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:51,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507053648] [2021-03-10 22:33:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:52,366 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:33:52,539 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:33:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:52,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507053648] [2021-03-10 22:33:52,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158616963] [2021-03-10 22:33:52,832 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 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 [2021-03-10 22:33:52,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:33:52,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:52,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:33:52,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:53,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:33:53,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:53,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:53,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:53,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:33:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:53,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:53,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 22:33:53,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717376273] [2021-03-10 22:33:53,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:33:53,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:53,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:33:53,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:33:53,612 INFO L87 Difference]: Start difference. First operand 1120 states and 2669 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:53,802 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:33:54,085 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:33:54,401 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:33:54,707 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:33:55,370 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:33:55,668 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:33:56,038 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:33:56,264 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:33:57,517 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:33:58,122 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:33:58,560 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:33:58,904 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:33:59,302 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:33:59,510 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 22:33:59,813 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 22:34:00,143 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:34:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:00,719 INFO L93 Difference]: Finished difference Result 2832 states and 6973 transitions. [2021-03-10 22:34:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:34:00,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:34:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:00,725 INFO L225 Difference]: With dead ends: 2832 [2021-03-10 22:34:00,725 INFO L226 Difference]: Without dead ends: 2822 [2021-03-10 22:34:00,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 5851.8ms TimeCoverageRelationStatistics Valid=392, Invalid=2158, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:34:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2021-03-10 22:34:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 1120. [2021-03-10 22:34:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.385165326184093) internal successors, (2669), 1119 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2669 transitions. [2021-03-10 22:34:00,740 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2669 transitions. Word has length 30 [2021-03-10 22:34:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:00,740 INFO L480 AbstractCegarLoop]: Abstraction has 1120 states and 2669 transitions. [2021-03-10 22:34:00,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:00,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2669 transitions. [2021-03-10 22:34:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:34:00,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:00,741 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:00,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-03-10 22:34:00,941 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:00,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1845604843, now seen corresponding path program 18 times [2021-03-10 22:34:00,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:00,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585069272] [2021-03-10 22:34:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:01,547 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:34:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:01,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585069272] [2021-03-10 22:34:01,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330249845] [2021-03-10 22:34:01,749 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 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 [2021-03-10 22:34:01,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:34:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:01,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:34:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:02,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:02,495 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:34:02,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:34:02,646 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 22:34:02,647 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:34:02,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:02,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-03-10 22:34:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:03,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:03,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 22:34:03,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109926288] [2021-03-10 22:34:03,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:34:03,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:03,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:34:03,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:34:03,018 INFO L87 Difference]: Start difference. First operand 1120 states and 2669 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:03,201 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:34:03,459 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:03,956 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 22:34:04,571 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:34:05,047 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 22:34:06,395 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:34:07,192 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 22:34:07,905 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-10 22:34:08,985 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 22:34:09,383 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 22:34:09,659 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:34:10,506 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 22:34:11,391 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 22:34:11,766 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-10 22:34:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:12,237 INFO L93 Difference]: Finished difference Result 2423 states and 5914 transitions. [2021-03-10 22:34:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:34:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 30 [2021-03-10 22:34:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:12,242 INFO L225 Difference]: With dead ends: 2423 [2021-03-10 22:34:12,242 INFO L226 Difference]: Without dead ends: 2414 [2021-03-10 22:34:12,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 6140.1ms TimeCoverageRelationStatistics Valid=347, Invalid=3075, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 22:34:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-03-10 22:34:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1119. [2021-03-10 22:34:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.3855098389982112) internal successors, (2667), 1118 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2667 transitions. [2021-03-10 22:34:12,255 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2667 transitions. Word has length 30 [2021-03-10 22:34:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:12,255 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 2667 transitions. [2021-03-10 22:34:12,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2667 transitions. [2021-03-10 22:34:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:34:12,256 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:12,256 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:12,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:12,456 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash -462514351, now seen corresponding path program 19 times [2021-03-10 22:34:12,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:12,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873730416] [2021-03-10 22:34:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:12,923 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:34:13,071 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:34:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873730416] [2021-03-10 22:34:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66645038] [2021-03-10 22:34:13,364 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 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 [2021-03-10 22:34:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:13,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:34:13,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:14,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:34:14,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:14,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:14,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:14,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-03-10 22:34:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:14,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:14,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-03-10 22:34:14,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546857492] [2021-03-10 22:34:14,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:34:14,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:34:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:34:14,125 INFO L87 Difference]: Start difference. First operand 1119 states and 2667 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:14,288 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:34:14,517 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:14,835 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 22:34:15,327 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:34:15,659 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:34:15,866 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:34:16,189 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:34:16,398 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:34:17,462 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:34:18,207 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:34:18,464 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 22:34:19,626 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:34:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:20,454 INFO L93 Difference]: Finished difference Result 2475 states and 6050 transitions. [2021-03-10 22:34:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:34:20,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:34:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:20,460 INFO L225 Difference]: With dead ends: 2475 [2021-03-10 22:34:20,460 INFO L226 Difference]: Without dead ends: 2466 [2021-03-10 22:34:20,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 4327.3ms TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:34:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-03-10 22:34:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1134. [2021-03-10 22:34:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 2.3874669020300088) internal successors, (2705), 1133 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2705 transitions. [2021-03-10 22:34:20,474 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2705 transitions. Word has length 30 [2021-03-10 22:34:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:20,474 INFO L480 AbstractCegarLoop]: Abstraction has 1134 states and 2705 transitions. [2021-03-10 22:34:20,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2705 transitions. [2021-03-10 22:34:20,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:34:20,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:20,475 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:20,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-03-10 22:34:20,679 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:20,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1155554699, now seen corresponding path program 20 times [2021-03-10 22:34:20,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:20,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427029300] [2021-03-10 22:34:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:21,118 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:34:21,268 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:34:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:21,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427029300] [2021-03-10 22:34:21,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671892899] [2021-03-10 22:34:21,543 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 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 [2021-03-10 22:34:21,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:34:21,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:21,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:34:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:22,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:34:22,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:22,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:22,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:22,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:34:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:22,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:22,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 22:34:22,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428629395] [2021-03-10 22:34:22,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:34:22,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:22,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:34:22,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:34:22,148 INFO L87 Difference]: Start difference. First operand 1134 states and 2705 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:22,315 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:34:22,548 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:22,890 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 22:34:23,459 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:23,824 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:34:24,056 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:34:24,393 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 22:34:24,605 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:34:25,707 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 22:34:26,069 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:27,215 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 22:34:28,028 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:34:28,383 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:34:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:29,214 INFO L93 Difference]: Finished difference Result 2534 states and 6223 transitions. [2021-03-10 22:34:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:34:29,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:34:29,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:29,219 INFO L225 Difference]: With dead ends: 2534 [2021-03-10 22:34:29,219 INFO L226 Difference]: Without dead ends: 2523 [2021-03-10 22:34:29,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 4478.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:34:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-03-10 22:34:29,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1146. [2021-03-10 22:34:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.3912663755458516) internal successors, (2738), 1145 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2738 transitions. [2021-03-10 22:34:29,233 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2738 transitions. Word has length 30 [2021-03-10 22:34:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:29,233 INFO L480 AbstractCegarLoop]: Abstraction has 1146 states and 2738 transitions. [2021-03-10 22:34:29,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2738 transitions. [2021-03-10 22:34:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:34:29,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:29,234 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:29,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-03-10 22:34:29,435 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1820757867, now seen corresponding path program 21 times [2021-03-10 22:34:29,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:29,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661319606] [2021-03-10 22:34:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:29,852 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:34:29,996 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:34:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:30,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661319606] [2021-03-10 22:34:30,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756980038] [2021-03-10 22:34:30,276 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 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 [2021-03-10 22:34:30,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:34:30,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:30,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:34:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:30,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:34:30,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:30,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:30,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:30,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:34:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:31,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:31,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-03-10 22:34:31,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016740110] [2021-03-10 22:34:31,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:34:31,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:34:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:34:31,016 INFO L87 Difference]: Start difference. First operand 1146 states and 2738 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:31,371 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:32,058 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:32,370 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:34:32,563 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:34:32,831 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 22:34:33,006 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:34:33,822 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 22:34:34,169 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:34,785 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:34:35,059 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:34:36,173 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:34:36,433 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:34:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:36,938 INFO L93 Difference]: Finished difference Result 2645 states and 6506 transitions. [2021-03-10 22:34:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:34:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:34:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:36,944 INFO L225 Difference]: With dead ends: 2645 [2021-03-10 22:34:36,944 INFO L226 Difference]: Without dead ends: 2625 [2021-03-10 22:34:36,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 4697.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1914, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:34:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-03-10 22:34:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1137. [2021-03-10 22:34:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.387323943661972) internal successors, (2712), 1136 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2712 transitions. [2021-03-10 22:34:36,958 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2712 transitions. Word has length 30 [2021-03-10 22:34:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:36,958 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 2712 transitions. [2021-03-10 22:34:36,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2712 transitions. [2021-03-10 22:34:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:34:36,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:36,959 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:37,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-03-10 22:34:37,160 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:37,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1475956119, now seen corresponding path program 22 times [2021-03-10 22:34:37,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:37,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497803257] [2021-03-10 22:34:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:37,577 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:34:37,718 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:34:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:37,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497803257] [2021-03-10 22:34:37,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778450270] [2021-03-10 22:34:37,992 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 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 [2021-03-10 22:34:38,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:34:38,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:38,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:34:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:38,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:34:38,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:38,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:38,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:38,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-03-10 22:34:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:38,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:38,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-03-10 22:34:38,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334994573] [2021-03-10 22:34:38,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:34:38,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:38,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:34:38,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:34:38,724 INFO L87 Difference]: Start difference. First operand 1137 states and 2712 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:38,889 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:34:39,113 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:39,446 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 22:34:39,990 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:34:40,335 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:34:40,534 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:34:40,862 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:34:41,092 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 22:34:42,374 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:34:43,333 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 22:34:43,976 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:34:44,560 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:34:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:45,521 INFO L93 Difference]: Finished difference Result 2453 states and 5999 transitions. [2021-03-10 22:34:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:34:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:34:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:45,526 INFO L225 Difference]: With dead ends: 2453 [2021-03-10 22:34:45,526 INFO L226 Difference]: Without dead ends: 2444 [2021-03-10 22:34:45,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 4436.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:34:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-03-10 22:34:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1131. [2021-03-10 22:34:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.3876106194690268) internal successors, (2698), 1130 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2698 transitions. [2021-03-10 22:34:45,540 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2698 transitions. Word has length 30 [2021-03-10 22:34:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:45,540 INFO L480 AbstractCegarLoop]: Abstraction has 1131 states and 2698 transitions. [2021-03-10 22:34:45,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2698 transitions. [2021-03-10 22:34:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:34:45,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:45,541 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:45,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-03-10 22:34:45,741 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash 309204733, now seen corresponding path program 23 times [2021-03-10 22:34:45,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:45,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200482460] [2021-03-10 22:34:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:46,165 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:34:46,297 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:34:46,468 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:34:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:46,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200482460] [2021-03-10 22:34:46,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22997350] [2021-03-10 22:34:46,761 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 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 [2021-03-10 22:34:46,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:34:46,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:46,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:34:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:47,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:34:47,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:47,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:47,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:47,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:34:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:47,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:47,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:34:47,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244279633] [2021-03-10 22:34:47,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:34:47,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:34:47,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:34:47,397 INFO L87 Difference]: Start difference. First operand 1131 states and 2698 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:47,906 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:48,144 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:34:48,539 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:34:48,748 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:34:49,265 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:34:49,808 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:34:51,260 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:34:51,547 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 22:34:51,936 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:34:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:52,796 INFO L93 Difference]: Finished difference Result 2566 states and 6269 transitions. [2021-03-10 22:34:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:34:52,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:34:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:52,802 INFO L225 Difference]: With dead ends: 2566 [2021-03-10 22:34:52,802 INFO L226 Difference]: Without dead ends: 2555 [2021-03-10 22:34:52,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3619.8ms TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:34:52,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-03-10 22:34:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1152. [2021-03-10 22:34:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.3935708079930493) internal successors, (2755), 1151 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2755 transitions. [2021-03-10 22:34:52,818 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2755 transitions. Word has length 30 [2021-03-10 22:34:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:52,818 INFO L480 AbstractCegarLoop]: Abstraction has 1152 states and 2755 transitions. [2021-03-10 22:34:52,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2755 transitions. [2021-03-10 22:34:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:34:52,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:52,819 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:53,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-03-10 22:34:53,019 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:53,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2065605783, now seen corresponding path program 24 times [2021-03-10 22:34:53,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:53,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343996387] [2021-03-10 22:34:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:53,475 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:34:53,619 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:34:53,795 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:34:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:54,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343996387] [2021-03-10 22:34:54,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363958099] [2021-03-10 22:34:54,103 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 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 [2021-03-10 22:34:54,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:34:54,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:54,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:34:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:54,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:34:54,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:54,640 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:34:54,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:34:54,832 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:34:54,833 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.5 percent of original size [2021-03-10 22:34:54,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:54,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:65 [2021-03-10 22:34:55,285 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 22:34:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:55,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:55,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2021-03-10 22:34:55,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221233364] [2021-03-10 22:34:55,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:34:55,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:55,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:34:55,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:34:55,402 INFO L87 Difference]: Start difference. First operand 1152 states and 2755 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:55,790 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:34:55,985 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:34:56,397 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-10 22:34:56,675 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-10 22:34:57,223 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 22:34:57,749 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-10 22:34:58,155 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 22:34:58,474 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 22:34:58,781 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:34:59,045 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:34:59,433 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-03-10 22:34:59,790 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-10 22:35:00,217 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2021-03-10 22:35:00,648 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:35:00,857 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 22:35:01,081 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-03-10 22:35:01,961 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:35:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:02,417 INFO L93 Difference]: Finished difference Result 2780 states and 6830 transitions. [2021-03-10 22:35:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:35:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:35:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:02,423 INFO L225 Difference]: With dead ends: 2780 [2021-03-10 22:35:02,423 INFO L226 Difference]: Without dead ends: 2768 [2021-03-10 22:35:02,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 6087.3ms TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:35:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-03-10 22:35:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1177. [2021-03-10 22:35:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.3962585034013606) internal successors, (2818), 1176 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2818 transitions. [2021-03-10 22:35:02,439 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2818 transitions. Word has length 30 [2021-03-10 22:35:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:02,439 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 2818 transitions. [2021-03-10 22:35:02,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2818 transitions. [2021-03-10 22:35:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:35:02,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:02,440 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:02,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-03-10 22:35:02,640 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1147655593, now seen corresponding path program 25 times [2021-03-10 22:35:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:02,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759220633] [2021-03-10 22:35:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:03,102 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:35:03,249 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:35:03,434 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:35:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:03,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759220633] [2021-03-10 22:35:03,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257627989] [2021-03-10 22:35:03,759 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 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 [2021-03-10 22:35:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:03,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:35:03,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:04,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:35:04,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:35:04,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:35:04,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:35:04,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:35:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:04,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:04,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:35:04,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465765064] [2021-03-10 22:35:04,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:35:04,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:04,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:35:04,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:35:04,523 INFO L87 Difference]: Start difference. First operand 1177 states and 2818 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) [2021-03-10 22:35:04,991 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:35:05,245 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:05,494 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:35:05,741 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 22:35:05,947 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:06,211 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 22:35:06,386 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-10 22:35:06,646 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:35:06,883 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:07,588 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:35:08,202 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:08,710 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:35:09,030 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 22:35:09,576 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:35:09,834 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:10,450 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:35:10,771 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-03-10 22:35:11,073 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:35:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:11,950 INFO L93 Difference]: Finished difference Result 3035 states and 7436 transitions. [2021-03-10 22:35:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:35:11,953 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 30 [2021-03-10 22:35:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:11,957 INFO L225 Difference]: With dead ends: 3035 [2021-03-10 22:35:11,957 INFO L226 Difference]: Without dead ends: 3008 [2021-03-10 22:35:11,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 5791.1ms TimeCoverageRelationStatistics Valid=511, Invalid=2039, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:35:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-03-10 22:35:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 1143. [2021-03-10 22:35:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.3887915936952715) internal successors, (2728), 1142 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2728 transitions. [2021-03-10 22:35:11,972 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2728 transitions. Word has length 30 [2021-03-10 22:35:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:11,972 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2728 transitions. [2021-03-10 22:35:11,972 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) [2021-03-10 22:35:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2728 transitions. [2021-03-10 22:35:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:35:11,973 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:11,973 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:12,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-03-10 22:35:12,174 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash -700407445, now seen corresponding path program 26 times [2021-03-10 22:35:12,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:12,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040719967] [2021-03-10 22:35:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:12,644 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:35:12,786 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:35:12,964 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:35:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:13,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040719967] [2021-03-10 22:35:13,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764218301] [2021-03-10 22:35:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:13,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:35:13,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:13,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:35:13,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:14,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:35:14,059 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-10 22:35:14,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:35:14,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:35:14,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:35:14,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-03-10 22:35:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:14,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:14,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-03-10 22:35:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951006814] [2021-03-10 22:35:14,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:35:14,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:35:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:35:14,536 INFO L87 Difference]: Start difference. First operand 1143 states and 2728 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:15,292 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-03-10 22:35:15,632 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:35:15,873 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:35:16,196 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-10 22:35:16,705 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:35:17,120 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:35:17,427 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 22:35:17,721 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 22:35:18,144 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 22:35:18,340 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:35:18,579 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 22:35:18,828 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 22:35:19,171 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:35:19,359 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:35:19,782 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:35:20,025 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:35:20,304 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-03-10 22:35:20,716 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:35:21,087 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:35:21,607 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:35:21,981 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:35:22,342 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:35:22,648 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 22:35:22,917 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:35:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:23,339 INFO L93 Difference]: Finished difference Result 2768 states and 6741 transitions. [2021-03-10 22:35:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:35:23,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-03-10 22:35:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:23,344 INFO L225 Difference]: With dead ends: 2768 [2021-03-10 22:35:23,345 INFO L226 Difference]: Without dead ends: 2748 [2021-03-10 22:35:23,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 7660.4ms TimeCoverageRelationStatistics Valid=574, Invalid=2078, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:35:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-03-10 22:35:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 1151. [2021-03-10 22:35:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 2.388695652173913) internal successors, (2747), 1150 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2747 transitions. [2021-03-10 22:35:23,357 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2747 transitions. Word has length 30 [2021-03-10 22:35:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:23,357 INFO L480 AbstractCegarLoop]: Abstraction has 1151 states and 2747 transitions. [2021-03-10 22:35:23,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2747 transitions. [2021-03-10 22:35:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:35:23,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:23,358 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:23,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-03-10 22:35:23,559 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:23,559 INFO L82 PathProgramCache]: Analyzing trace with hash 373838239, now seen corresponding path program 27 times [2021-03-10 22:35:23,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:23,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746030303] [2021-03-10 22:35:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:24,057 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:35:24,202 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:35:24,350 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:35:24,514 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:35:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746030303] [2021-03-10 22:35:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641030951] [2021-03-10 22:35:24,780 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:24,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:35:24,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:24,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:35:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:25,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:35:25,360 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 20 treesize of output 36 [2021-03-10 22:35:25,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:35:25,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:35:25,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:35:25,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-03-10 22:35:26,143 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 22:35:26,525 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:35:27,103 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:35:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:27,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:27,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 22:35:27,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595662923] [2021-03-10 22:35:27,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:35:27,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:27,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:35:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:35:27,281 INFO L87 Difference]: Start difference. First operand 1151 states and 2747 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:27,487 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-03-10 22:35:27,735 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 20 [2021-03-10 22:35:28,025 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:35:28,662 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-10 22:35:29,741 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-03-10 22:35:30,561 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-03-10 22:35:30,856 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 22:35:31,168 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:35:31,817 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 22:35:32,162 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:35:33,594 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-03-10 22:35:34,721 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-03-10 22:35:35,254 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-03-10 22:35:36,204 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-10 22:35:36,725 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-10 22:35:36,955 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 22:35:38,056 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-03-10 22:35:38,839 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:35:39,317 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-03-10 22:35:39,896 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-03-10 22:35:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:40,132 INFO L93 Difference]: Finished difference Result 2465 states and 6023 transitions. [2021-03-10 22:35:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:35:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-03-10 22:35:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:40,138 INFO L225 Difference]: With dead ends: 2465 [2021-03-10 22:35:40,138 INFO L226 Difference]: Without dead ends: 2454 [2021-03-10 22:35:40,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 11680.8ms TimeCoverageRelationStatistics Valid=456, Invalid=2514, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 22:35:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-03-10 22:35:40,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 1161. [2021-03-10 22:35:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.3922413793103448) internal successors, (2775), 1160 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2775 transitions. [2021-03-10 22:35:40,151 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2775 transitions. Word has length 30 [2021-03-10 22:35:40,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:40,151 INFO L480 AbstractCegarLoop]: Abstraction has 1161 states and 2775 transitions. [2021-03-10 22:35:40,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:40,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2775 transitions. [2021-03-10 22:35:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:35:40,152 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:40,152 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:40,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:40,353 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2130239289, now seen corresponding path program 28 times [2021-03-10 22:35:40,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:40,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097551931] [2021-03-10 22:35:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:40,812 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:35:40,962 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:35:41,110 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:35:41,262 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:35:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:41,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097551931] [2021-03-10 22:35:41,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457851611] [2021-03-10 22:35:41,524 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:41,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:35:41,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:41,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:35:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:42,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:35:42,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:35:42,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:35:42,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:35:42,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:35:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:42,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:42,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:35:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432936093] [2021-03-10 22:35:42,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:35:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:35:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:35:42,262 INFO L87 Difference]: Start difference. First operand 1161 states and 2775 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:42,940 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:35:43,189 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:35:43,464 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:44,021 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:35:44,315 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:35:44,663 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:35:44,977 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 22:35:45,537 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:35:46,681 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:35:47,009 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 22:35:47,677 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:35:47,888 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:48,473 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 22:35:48,851 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 22:35:49,272 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:35:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:49,866 INFO L93 Difference]: Finished difference Result 2807 states and 6901 transitions. [2021-03-10 22:35:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:35:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:35:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:49,872 INFO L225 Difference]: With dead ends: 2807 [2021-03-10 22:35:49,872 INFO L226 Difference]: Without dead ends: 2787 [2021-03-10 22:35:49,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 5422.5ms TimeCoverageRelationStatistics Valid=384, Invalid=1686, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:35:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-03-10 22:35:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1155. [2021-03-10 22:35:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.388214904679376) internal successors, (2756), 1154 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2756 transitions. [2021-03-10 22:35:49,886 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2756 transitions. Word has length 30 [2021-03-10 22:35:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:49,886 INFO L480 AbstractCegarLoop]: Abstraction has 1155 states and 2756 transitions. [2021-03-10 22:35:49,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2756 transitions. [2021-03-10 22:35:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:35:49,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:49,887 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:50,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-03-10 22:35:50,088 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:50,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1530004133, now seen corresponding path program 29 times [2021-03-10 22:35:50,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:50,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473219346] [2021-03-10 22:35:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:50,522 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:35:50,660 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:35:50,824 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:35:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:51,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473219346] [2021-03-10 22:35:51,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604911249] [2021-03-10 22:35:51,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:51,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:35:51,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:51,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:35:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:51,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:35:51,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:35:51,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:35:51,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:35:51,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:35:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:51,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:51,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 22:35:51,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472335739] [2021-03-10 22:35:51,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:35:51,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:51,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:35:51,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:35:51,831 INFO L87 Difference]: Start difference. First operand 1155 states and 2756 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:51,992 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:35:52,223 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:35:52,496 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:52,788 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:35:53,345 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:35:53,604 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:35:53,882 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:35:54,143 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:35:54,447 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:35:54,736 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:35:55,119 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:35:55,591 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:35:56,414 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:35:57,525 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:35:57,825 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:35:57,984 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 22:35:58,249 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 22:35:58,571 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 22:35:58,963 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:35:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:59,576 INFO L93 Difference]: Finished difference Result 2920 states and 7194 transitions. [2021-03-10 22:35:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:35:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:35:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:59,583 INFO L225 Difference]: With dead ends: 2920 [2021-03-10 22:35:59,583 INFO L226 Difference]: Without dead ends: 2905 [2021-03-10 22:35:59,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 6201.9ms TimeCoverageRelationStatistics Valid=418, Invalid=2132, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:35:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-03-10 22:35:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 1154. [2021-03-10 22:35:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 2.388551604509974) internal successors, (2754), 1153 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2754 transitions. [2021-03-10 22:35:59,598 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2754 transitions. Word has length 30 [2021-03-10 22:35:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:59,598 INFO L480 AbstractCegarLoop]: Abstraction has 1154 states and 2754 transitions. [2021-03-10 22:35:59,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2754 transitions. [2021-03-10 22:35:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:35:59,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:59,599 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:59,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-03-10 22:35:59,800 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:59,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2050752091, now seen corresponding path program 30 times [2021-03-10 22:35:59,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:59,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225075775] [2021-03-10 22:35:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:00,295 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:36:00,451 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:36:00,614 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:36:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:00,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225075775] [2021-03-10 22:36:00,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082026013] [2021-03-10 22:36:00,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:00,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:36:00,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:00,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:36:00,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:01,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:36:01,752 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:36:01,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:36:01,951 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 22:36:01,952 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:36:01,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:36:01,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-03-10 22:36:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:02,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:02,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 22:36:02,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314591184] [2021-03-10 22:36:02,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:36:02,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:36:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:36:02,428 INFO L87 Difference]: Start difference. First operand 1154 states and 2754 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:02,647 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:36:02,948 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:36:03,506 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 22:36:04,238 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:36:04,763 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:36:05,164 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-10 22:36:05,550 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-10 22:36:05,837 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 22:36:06,316 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:36:08,024 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 22:36:09,186 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 22:36:10,022 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 22:36:10,322 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-10 22:36:10,945 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 22:36:11,278 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:36:11,486 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:36:12,147 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 22:36:12,615 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 22:36:12,988 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 22:36:13,507 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 22:36:13,826 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:36:14,074 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:36:14,278 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:36:15,157 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 22:36:16,180 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 22:36:16,536 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 22:36:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:17,015 INFO L93 Difference]: Finished difference Result 2642 states and 6460 transitions. [2021-03-10 22:36:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 22:36:17,019 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 30 [2021-03-10 22:36:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:17,021 INFO L225 Difference]: With dead ends: 2642 [2021-03-10 22:36:17,021 INFO L226 Difference]: Without dead ends: 2633 [2021-03-10 22:36:17,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 9891.0ms TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 22:36:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-03-10 22:36:17,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1153. [2021-03-10 22:36:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.388888888888889) internal successors, (2752), 1152 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) [2021-03-10 22:36:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 2752 transitions. [2021-03-10 22:36:17,036 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 2752 transitions. Word has length 30 [2021-03-10 22:36:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:17,036 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 2752 transitions. [2021-03-10 22:36:17,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 2752 transitions. [2021-03-10 22:36:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:36:17,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:17,037 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:17,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:17,237 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 513543889, now seen corresponding path program 31 times [2021-03-10 22:36:17,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:17,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151827008] [2021-03-10 22:36:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:18,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151827008] [2021-03-10 22:36:18,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282970305] [2021-03-10 22:36:18,078 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:18,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:36:18,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:18,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:36:18,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:36:18,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:36:18,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:36:18,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:36:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:18,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:18,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:36:18,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117202879] [2021-03-10 22:36:18,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:36:18,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:18,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:36:18,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:36:18,887 INFO L87 Difference]: Start difference. First operand 1153 states and 2752 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:19,534 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:36:19,809 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:36:20,255 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:36:20,736 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:36:22,479 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:36:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:23,345 INFO L93 Difference]: Finished difference Result 2676 states and 6547 transitions. [2021-03-10 22:36:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:36:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:36:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:23,351 INFO L225 Difference]: With dead ends: 2676 [2021-03-10 22:36:23,351 INFO L226 Difference]: Without dead ends: 2665 [2021-03-10 22:36:23,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3165.2ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:36:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-03-10 22:36:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1183. [2021-03-10 22:36:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.3984771573604062) internal successors, (2835), 1182 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2835 transitions. [2021-03-10 22:36:23,366 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2835 transitions. Word has length 30 [2021-03-10 22:36:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:23,366 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 2835 transitions. [2021-03-10 22:36:23,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2835 transitions. [2021-03-10 22:36:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:36:23,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:23,367 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:23,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:23,568 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2025022357, now seen corresponding path program 32 times [2021-03-10 22:36:23,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:23,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265510842] [2021-03-10 22:36:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:24,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265510842] [2021-03-10 22:36:24,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114318062] [2021-03-10 22:36:24,383 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:24,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:36:24,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:24,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:36:24,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:25,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:36:25,053 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:36:25,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:36:25,262 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 22:36:25,263 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-03-10 22:36:25,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:36:25,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-03-10 22:36:25,440 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 22:36:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:25,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:25,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-03-10 22:36:25,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442972643] [2021-03-10 22:36:25,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:36:25,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:36:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:36:25,727 INFO L87 Difference]: Start difference. First operand 1183 states and 2835 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:26,120 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:36:26,353 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:36:26,684 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-03-10 22:36:27,013 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 22:36:27,557 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 22:36:28,181 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 22:36:28,411 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 22:36:28,784 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 22:36:29,007 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:36:29,340 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:36:30,756 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:36:31,007 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:36:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:31,443 INFO L93 Difference]: Finished difference Result 2825 states and 6968 transitions. [2021-03-10 22:36:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:36:31,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:36:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:31,450 INFO L225 Difference]: With dead ends: 2825 [2021-03-10 22:36:31,450 INFO L226 Difference]: Without dead ends: 2813 [2021-03-10 22:36:31,450 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 4761.4ms TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:36:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-03-10 22:36:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 1214. [2021-03-10 22:36:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.403957131079967) internal successors, (2916), 1213 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2916 transitions. [2021-03-10 22:36:31,467 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2916 transitions. Word has length 30 [2021-03-10 22:36:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:31,467 INFO L480 AbstractCegarLoop]: Abstraction has 1214 states and 2916 transitions. [2021-03-10 22:36:31,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2916 transitions. [2021-03-10 22:36:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:36:31,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:31,468 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:31,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-03-10 22:36:31,668 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1351994749, now seen corresponding path program 33 times [2021-03-10 22:36:31,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:31,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925507513] [2021-03-10 22:36:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:31,907 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:36:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:32,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925507513] [2021-03-10 22:36:32,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444695154] [2021-03-10 22:36:32,644 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:32,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:36:32,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:32,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:36:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:33,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:36:33,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:36:33,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:36:33,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:36:33,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:36:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:33,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:33,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:36:33,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679406846] [2021-03-10 22:36:33,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:36:33,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:33,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:36:33,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:36:33,479 INFO L87 Difference]: Start difference. First operand 1214 states and 2916 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) [2021-03-10 22:36:33,903 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 22:36:34,132 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:36:34,416 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:36:34,694 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:36:34,987 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:36:35,529 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:36:35,747 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:36:36,010 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-10 22:36:36,872 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:36:37,636 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:36:37,974 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:36:38,557 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:36:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:39,024 INFO L93 Difference]: Finished difference Result 3133 states and 7680 transitions. [2021-03-10 22:36:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:36:39,028 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 30 [2021-03-10 22:36:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:39,031 INFO L225 Difference]: With dead ends: 3133 [2021-03-10 22:36:39,032 INFO L226 Difference]: Without dead ends: 3111 [2021-03-10 22:36:39,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4616.6ms TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:36:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-03-10 22:36:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1163. [2021-03-10 22:36:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 2.3907056798623065) internal successors, (2778), 1162 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2778 transitions. [2021-03-10 22:36:39,049 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2778 transitions. Word has length 30 [2021-03-10 22:36:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:39,049 INFO L480 AbstractCegarLoop]: Abstraction has 1163 states and 2778 transitions. [2021-03-10 22:36:39,049 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) [2021-03-10 22:36:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2778 transitions. [2021-03-10 22:36:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:36:39,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:39,050 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:39,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-03-10 22:36:39,250 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash 698605027, now seen corresponding path program 34 times [2021-03-10 22:36:39,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:39,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325851110] [2021-03-10 22:36:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:39,448 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:36:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:40,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325851110] [2021-03-10 22:36:40,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054849530] [2021-03-10 22:36:40,166 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:40,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:36:40,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:40,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:36:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:40,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:36:40,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:36:40,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:36:40,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:36:40,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:36:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:40,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:40,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:36:40,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409863294] [2021-03-10 22:36:40,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:36:40,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:36:40,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:36:40,985 INFO L87 Difference]: Start difference. First operand 1163 states and 2778 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) [2021-03-10 22:36:41,810 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:36:42,149 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:36:42,308 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:36:42,981 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:36:43,198 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:36:44,122 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:36:44,457 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:36:44,688 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:36:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:45,121 INFO L93 Difference]: Finished difference Result 2630 states and 6391 transitions. [2021-03-10 22:36:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:36:45,125 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 30 [2021-03-10 22:36:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:45,127 INFO L225 Difference]: With dead ends: 2630 [2021-03-10 22:36:45,127 INFO L226 Difference]: Without dead ends: 2607 [2021-03-10 22:36:45,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3619.4ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:36:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-03-10 22:36:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1157. [2021-03-10 22:36:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.38840830449827) internal successors, (2761), 1156 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2761 transitions. [2021-03-10 22:36:45,142 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2761 transitions. Word has length 30 [2021-03-10 22:36:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:45,142 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 2761 transitions. [2021-03-10 22:36:45,142 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) [2021-03-10 22:36:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2761 transitions. [2021-03-10 22:36:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:36:45,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:45,143 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:45,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:45,343 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:45,344 INFO L82 PathProgramCache]: Analyzing trace with hash -614639997, now seen corresponding path program 35 times [2021-03-10 22:36:45,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:45,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282806918] [2021-03-10 22:36:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:46,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282806918] [2021-03-10 22:36:46,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331963403] [2021-03-10 22:36:46,278 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:46,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:36:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:46,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:36:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:47,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:36:47,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:36:47,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:36:47,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:36:47,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:36:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:47,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:47,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:36:47,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142754657] [2021-03-10 22:36:47,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:36:47,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:36:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:36:47,134 INFO L87 Difference]: Start difference. First operand 1157 states and 2761 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) [2021-03-10 22:36:48,191 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:36:48,550 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:36:49,357 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:36:50,586 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 22:36:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:50,985 INFO L93 Difference]: Finished difference Result 2514 states and 6127 transitions. [2021-03-10 22:36:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:36:50,988 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 30 [2021-03-10 22:36:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:50,991 INFO L225 Difference]: With dead ends: 2514 [2021-03-10 22:36:50,991 INFO L226 Difference]: Without dead ends: 2504 [2021-03-10 22:36:50,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3098.6ms TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:36:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-03-10 22:36:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 1154. [2021-03-10 22:36:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 2.388551604509974) internal successors, (2754), 1153 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2754 transitions. [2021-03-10 22:36:51,005 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2754 transitions. Word has length 30 [2021-03-10 22:36:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:51,005 INFO L480 AbstractCegarLoop]: Abstraction has 1154 states and 2754 transitions. [2021-03-10 22:36:51,005 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) [2021-03-10 22:36:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2754 transitions. [2021-03-10 22:36:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:36:51,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:51,006 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:51,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:51,206 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash 198282265, now seen corresponding path program 36 times [2021-03-10 22:36:51,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:51,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819918452] [2021-03-10 22:36:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:51,763 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:36:51,977 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:36:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:52,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819918452] [2021-03-10 22:36:52,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395547240] [2021-03-10 22:36:52,301 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:52,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:36:52,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:52,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:36:52,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:53,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:36:53,089 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:36:53,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:36:53,311 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:36:53,313 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.2 percent of original size [2021-03-10 22:36:53,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:36:53,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:60 [2021-03-10 22:36:53,485 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 22:36:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:36:53,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:53,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-03-10 22:36:53,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87319713] [2021-03-10 22:36:53,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:36:53,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:36:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:36:53,767 INFO L87 Difference]: Start difference. First operand 1154 states and 2754 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:54,215 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:36:54,470 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:36:54,833 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-03-10 22:36:55,258 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 22:36:55,933 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 22:36:56,176 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:36:56,582 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:36:57,100 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:36:57,747 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 22:36:58,210 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:36:58,598 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-10 22:36:59,330 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 22:36:59,507 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-03-10 22:37:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:00,675 INFO L93 Difference]: Finished difference Result 2535 states and 6188 transitions. [2021-03-10 22:37:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:37:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:37:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:00,681 INFO L225 Difference]: With dead ends: 2535 [2021-03-10 22:37:00,681 INFO L226 Difference]: Without dead ends: 2524 [2021-03-10 22:37:00,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 5859.2ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:37:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-03-10 22:37:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1176. [2021-03-10 22:37:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.3940425531914893) internal successors, (2813), 1175 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2813 transitions. [2021-03-10 22:37:00,694 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2813 transitions. Word has length 30 [2021-03-10 22:37:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:00,695 INFO L480 AbstractCegarLoop]: Abstraction has 1176 states and 2813 transitions. [2021-03-10 22:37:00,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2813 transitions. [2021-03-10 22:37:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:37:00,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:00,696 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:00,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:00,896 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1954683315, now seen corresponding path program 37 times [2021-03-10 22:37:00,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:00,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010323287] [2021-03-10 22:37:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:01,436 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:37:01,634 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:37:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:01,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010323287] [2021-03-10 22:37:01,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977942369] [2021-03-10 22:37:01,940 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:01,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:37:01,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:37:02,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:37:02,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:37:02,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:37:02,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:37:02,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:37:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:02,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:37:02,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:37:02,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660563306] [2021-03-10 22:37:02,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:37:02,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:37:02,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:37:02,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:37:02,795 INFO L87 Difference]: Start difference. First operand 1176 states and 2813 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:03,389 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:37:03,664 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:37:04,203 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:37:04,696 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:37:05,190 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:37:06,087 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:37:06,587 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:37:06,853 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:37:07,038 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:37:07,393 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:37:07,575 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2021-03-10 22:37:08,008 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-03-10 22:37:08,323 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:37:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:09,247 INFO L93 Difference]: Finished difference Result 2845 states and 7009 transitions. [2021-03-10 22:37:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:37:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:37:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:09,253 INFO L225 Difference]: With dead ends: 2845 [2021-03-10 22:37:09,254 INFO L226 Difference]: Without dead ends: 2825 [2021-03-10 22:37:09,254 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 4581.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:37:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-03-10 22:37:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 1170. [2021-03-10 22:37:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.3900769888793842) internal successors, (2794), 1169 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2794 transitions. [2021-03-10 22:37:09,268 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2794 transitions. Word has length 30 [2021-03-10 22:37:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:09,268 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 2794 transitions. [2021-03-10 22:37:09,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2794 transitions. [2021-03-10 22:37:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:37:09,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:09,269 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:09,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:09,471 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash -811329913, now seen corresponding path program 38 times [2021-03-10 22:37:09,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:09,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69273982] [2021-03-10 22:37:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:10,080 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:37:10,307 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:37:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:10,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69273982] [2021-03-10 22:37:10,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471397628] [2021-03-10 22:37:10,680 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:10,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:37:10,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:37:10,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:37:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:37:11,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:37:11,523 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-10 22:37:11,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:37:11,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:37:11,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:37:11,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-03-10 22:37:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:11,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:37:11,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-03-10 22:37:11,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119185195] [2021-03-10 22:37:11,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:37:11,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:37:11,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:37:11,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:37:11,998 INFO L87 Difference]: Start difference. First operand 1170 states and 2794 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:12,714 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-03-10 22:37:13,122 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 22:37:13,564 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-10 22:37:14,061 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:37:14,481 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:37:14,799 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 22:37:15,247 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 22:37:15,505 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:37:15,920 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:37:16,126 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:37:16,481 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 22:37:16,739 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:37:16,938 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:37:17,092 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 22:37:17,286 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 22:37:17,607 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:37:17,816 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-03-10 22:37:18,281 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 22:37:18,549 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:37:18,947 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:37:19,211 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:37:19,585 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 22:37:20,004 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:37:20,216 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 22:37:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:20,659 INFO L93 Difference]: Finished difference Result 2776 states and 6765 transitions. [2021-03-10 22:37:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:37:20,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-03-10 22:37:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:20,665 INFO L225 Difference]: With dead ends: 2776 [2021-03-10 22:37:20,665 INFO L226 Difference]: Without dead ends: 2756 [2021-03-10 22:37:20,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 7844.7ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:37:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-03-10 22:37:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1170. [2021-03-10 22:37:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.3900769888793842) internal successors, (2794), 1169 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2794 transitions. [2021-03-10 22:37:20,679 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2794 transitions. Word has length 30 [2021-03-10 22:37:20,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:20,679 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 2794 transitions. [2021-03-10 22:37:20,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2794 transitions. [2021-03-10 22:37:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:37:20,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:20,680 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:20,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-03-10 22:37:20,881 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1128175109, now seen corresponding path program 39 times [2021-03-10 22:37:20,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:20,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905809451] [2021-03-10 22:37:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:21,426 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:37:21,595 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:37:21,771 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:37:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905809451] [2021-03-10 22:37:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135419001] [2021-03-10 22:37:22,077 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:22,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:37:22,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:37:22,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:37:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:37:22,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:37:22,746 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 20 treesize of output 36 [2021-03-10 22:37:22,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:37:22,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:37:22,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:37:22,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-03-10 22:37:23,606 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 22:37:24,067 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 22:37:24,582 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:37:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:24,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:37:24,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 22:37:24,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268461226] [2021-03-10 22:37:24,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:37:24,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:37:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:37:24,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:37:24,731 INFO L87 Difference]: Start difference. First operand 1170 states and 2794 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:24,934 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 18 [2021-03-10 22:37:25,207 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 20 [2021-03-10 22:37:25,575 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:37:26,229 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 22:37:26,952 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 18 [2021-03-10 22:37:27,758 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-03-10 22:37:28,098 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 22:37:28,430 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:37:29,020 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:37:29,348 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:37:31,002 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-03-10 22:37:32,485 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 22:37:33,586 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-03-10 22:37:34,099 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-10 22:37:35,041 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-10 22:37:35,919 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-03-10 22:37:36,578 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:37:37,121 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 22:37:37,509 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-03-10 22:37:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:37,628 INFO L93 Difference]: Finished difference Result 2481 states and 6062 transitions. [2021-03-10 22:37:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:37:37,632 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-03-10 22:37:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:37,634 INFO L225 Difference]: With dead ends: 2481 [2021-03-10 22:37:37,634 INFO L226 Difference]: Without dead ends: 2470 [2021-03-10 22:37:37,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 12083.9ms TimeCoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 22:37:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-10 22:37:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 1180. [2021-03-10 22:37:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 2.393553859202714) internal successors, (2822), 1179 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 2822 transitions. [2021-03-10 22:37:37,648 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 2822 transitions. Word has length 30 [2021-03-10 22:37:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:37,648 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 2822 transitions. [2021-03-10 22:37:37,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 2822 transitions. [2021-03-10 22:37:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:37:37,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:37,649 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:37,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:37,850 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash 628225941, now seen corresponding path program 40 times [2021-03-10 22:37:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:37,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381698553] [2021-03-10 22:37:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:38,042 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:37:38,431 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:37:38,610 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:37:38,791 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:37:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:39,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381698553] [2021-03-10 22:37:39,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087877253] [2021-03-10 22:37:39,098 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:39,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:37:39,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:37:39,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:37:39,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:37:39,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:37:39,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:37:39,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:37:39,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:37:39,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:37:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:39,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:37:39,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:37:39,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873776683] [2021-03-10 22:37:39,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:37:39,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:37:39,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:37:39,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:37:39,899 INFO L87 Difference]: Start difference. First operand 1180 states and 2822 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:40,470 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 22:37:40,688 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:37:40,961 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:37:41,232 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:37:41,839 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:37:42,154 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 22:37:42,479 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 22:37:43,055 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:37:43,470 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 22:37:44,266 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:37:44,975 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:37:45,196 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:37:45,407 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 22:37:45,783 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2021-03-10 22:37:46,204 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 22:37:46,480 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:37:46,688 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 22:37:47,060 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:37:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:47,612 INFO L93 Difference]: Finished difference Result 2868 states and 7053 transitions. [2021-03-10 22:37:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:37:47,615 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:37:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:47,618 INFO L225 Difference]: With dead ends: 2868 [2021-03-10 22:37:47,618 INFO L226 Difference]: Without dead ends: 2848 [2021-03-10 22:37:47,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 6291.6ms TimeCoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 22:37:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-03-10 22:37:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1174. [2021-03-10 22:37:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 2.389599317988065) internal successors, (2803), 1173 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 2803 transitions. [2021-03-10 22:37:47,632 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 2803 transitions. Word has length 30 [2021-03-10 22:37:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:47,632 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 2803 transitions. [2021-03-10 22:37:47,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 2803 transitions. [2021-03-10 22:37:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:37:47,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:47,633 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:47,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:47,834 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash 27990785, now seen corresponding path program 41 times [2021-03-10 22:37:47,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:47,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83359575] [2021-03-10 22:37:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:48,039 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:37:48,460 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:37:48,641 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:37:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:48,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83359575] [2021-03-10 22:37:48,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192633840] [2021-03-10 22:37:48,939 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:48,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:37:48,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:37:48,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:37:48,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:37:49,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-03-10 22:37:49,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:37:49,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:37:49,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:37:49,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-03-10 22:37:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:49,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:37:49,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 22:37:49,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375640190] [2021-03-10 22:37:49,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:37:49,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:37:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:37:49,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:37:49,752 INFO L87 Difference]: Start difference. First operand 1174 states and 2803 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:49,936 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:37:50,209 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:37:50,524 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:37:50,862 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:37:51,056 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 22:37:51,613 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:37:51,942 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:37:52,356 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 22:37:52,693 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:37:52,990 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:37:53,275 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:37:53,574 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:37:53,954 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:37:54,488 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:37:55,404 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:37:56,104 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:37:56,519 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:37:56,774 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 22:37:57,137 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 22:37:57,557 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:37:57,931 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 22:37:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:58,323 INFO L93 Difference]: Finished difference Result 2927 states and 7211 transitions. [2021-03-10 22:37:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:37:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:37:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:58,330 INFO L225 Difference]: With dead ends: 2927 [2021-03-10 22:37:58,330 INFO L226 Difference]: Without dead ends: 2912 [2021-03-10 22:37:58,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 7011.4ms TimeCoverageRelationStatistics Valid=415, Invalid=2135, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:37:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-03-10 22:37:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 1170. [2021-03-10 22:37:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.3900769888793842) internal successors, (2794), 1169 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2794 transitions. [2021-03-10 22:37:58,346 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2794 transitions. Word has length 30 [2021-03-10 22:37:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:58,346 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 2794 transitions. [2021-03-10 22:37:58,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2794 transitions. [2021-03-10 22:37:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:37:58,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:58,347 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:58,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-03-10 22:37:58,547 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash 742201857, now seen corresponding path program 42 times [2021-03-10 22:37:58,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:58,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657368307] [2021-03-10 22:37:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:58,739 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:37:59,130 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:37:59,298 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:37:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:59,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657368307] [2021-03-10 22:37:59,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135485068] [2021-03-10 22:37:59,572 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:59,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:37:59,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:37:59,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:37:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:00,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:38:00,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:38:00,581 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:38:00,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:38:00,814 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 22:38:00,815 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.8 percent of original size [2021-03-10 22:38:00,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:38:00,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:53 [2021-03-10 22:38:01,347 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:38:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:01,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:01,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 22:38:01,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560919454] [2021-03-10 22:38:01,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:38:01,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:01,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:38:01,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:38:01,464 INFO L87 Difference]: Start difference. First operand 1170 states and 2794 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:01,691 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:38:02,003 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:38:02,621 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 22:38:03,352 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:38:04,123 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 22:38:04,524 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 22:38:04,761 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 22:38:05,290 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:38:06,083 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 22:38:07,087 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:38:07,533 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 22:38:08,073 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 22:38:08,594 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 22:38:09,188 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 22:38:10,116 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-03-10 22:38:10,365 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:38:10,778 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 22:38:11,164 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 22:38:12,410 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 22:38:12,710 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:38:13,820 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:38:14,435 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 22:38:14,719 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 22:38:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:15,311 INFO L93 Difference]: Finished difference Result 2619 states and 6400 transitions. [2021-03-10 22:38:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 22:38:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 30 [2021-03-10 22:38:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:15,319 INFO L225 Difference]: With dead ends: 2619 [2021-03-10 22:38:15,319 INFO L226 Difference]: Without dead ends: 2610 [2021-03-10 22:38:15,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 9910.3ms TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 22:38:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2021-03-10 22:38:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 1166. [2021-03-10 22:38:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 2.390557939914163) internal successors, (2785), 1165 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2785 transitions. [2021-03-10 22:38:15,334 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2785 transitions. Word has length 30 [2021-03-10 22:38:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:15,334 INFO L480 AbstractCegarLoop]: Abstraction has 1166 states and 2785 transitions. [2021-03-10 22:38:15,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2785 transitions. [2021-03-10 22:38:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:38:15,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:15,335 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:15,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-03-10 22:38:15,535 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:15,536 INFO L82 PathProgramCache]: Analyzing trace with hash 353002989, now seen corresponding path program 43 times [2021-03-10 22:38:15,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:15,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181365410] [2021-03-10 22:38:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:15,763 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:38:16,120 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:38:16,295 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:38:16,511 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:38:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:16,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181365410] [2021-03-10 22:38:16,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301809049] [2021-03-10 22:38:16,910 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:16,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:38:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:17,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 22:38:17,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:38:17,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:38:17,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:38:17,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-03-10 22:38:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:17,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:17,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:38:17,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488283885] [2021-03-10 22:38:17,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:38:17,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:17,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:38:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:38:17,796 INFO L87 Difference]: Start difference. First operand 1166 states and 2785 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) [2021-03-10 22:38:18,303 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-03-10 22:38:18,935 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 22:38:19,197 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 22:38:19,459 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:38:19,757 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:38:20,232 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:38:20,824 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 22:38:21,161 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:38:21,476 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 22:38:21,851 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 22:38:22,247 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:38:22,489 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:38:23,007 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2021-03-10 22:38:23,231 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 22:38:23,636 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:38:24,201 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-10 22:38:24,476 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:38:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:25,411 INFO L93 Difference]: Finished difference Result 2485 states and 6061 transitions. [2021-03-10 22:38:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:38:25,414 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 30 [2021-03-10 22:38:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:25,417 INFO L225 Difference]: With dead ends: 2485 [2021-03-10 22:38:25,417 INFO L226 Difference]: Without dead ends: 2462 [2021-03-10 22:38:25,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 5517.8ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:38:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-03-10 22:38:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1152. [2021-03-10 22:38:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.3883579496090355) internal successors, (2749), 1151 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2749 transitions. [2021-03-10 22:38:25,430 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2749 transitions. Word has length 30 [2021-03-10 22:38:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:25,430 INFO L480 AbstractCegarLoop]: Abstraction has 1152 states and 2749 transitions. [2021-03-10 22:38:25,430 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) [2021-03-10 22:38:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2749 transitions. [2021-03-10 22:38:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:38:25,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:25,431 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:25,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-03-10 22:38:25,631 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 868398259, now seen corresponding path program 25 times [2021-03-10 22:38:25,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:25,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486136785] [2021-03-10 22:38:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:26,151 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:38:26,348 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:38:26,554 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:38:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:26,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486136785] [2021-03-10 22:38:26,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964014305] [2021-03-10 22:38:26,952 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:26,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:38:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:27,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:38:27,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:38:27,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:38:27,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:38:27,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-03-10 22:38:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:27,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:27,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-03-10 22:38:27,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021423023] [2021-03-10 22:38:27,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:38:27,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:27,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:38:27,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:38:27,731 INFO L87 Difference]: Start difference. First operand 1152 states and 2749 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:28,123 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-10 22:38:28,338 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2021-03-10 22:38:28,544 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:38:28,775 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:38:29,163 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:38:29,521 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:38:29,892 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:38:30,224 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:38:30,600 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:38:31,153 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:38:31,496 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:38:32,100 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-10 22:38:32,264 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 22:38:33,678 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 22:38:34,027 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2021-03-10 22:38:34,220 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 22:38:34,581 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 22:38:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:35,252 INFO L93 Difference]: Finished difference Result 2571 states and 6279 transitions. [2021-03-10 22:38:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:38:35,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:38:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:35,259 INFO L225 Difference]: With dead ends: 2571 [2021-03-10 22:38:35,259 INFO L226 Difference]: Without dead ends: 2556 [2021-03-10 22:38:35,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 5760.3ms TimeCoverageRelationStatistics Valid=328, Invalid=1564, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:38:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-03-10 22:38:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1149. [2021-03-10 22:38:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 2.3885017421602788) internal successors, (2742), 1148 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 2742 transitions. [2021-03-10 22:38:35,273 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 2742 transitions. Word has length 30 [2021-03-10 22:38:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:35,273 INFO L480 AbstractCegarLoop]: Abstraction has 1149 states and 2742 transitions. [2021-03-10 22:38:35,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 2742 transitions. [2021-03-10 22:38:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:38:35,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:35,274 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:35,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:35,474 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1134723779, now seen corresponding path program 26 times [2021-03-10 22:38:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:35,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729330913] [2021-03-10 22:38:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:35,693 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:38:36,073 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:38:36,256 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 22:38:36,445 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:38:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:36,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729330913] [2021-03-10 22:38:36,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773960019] [2021-03-10 22:38:36,864 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:36,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:38:36,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:38:36,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:38:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:37,742 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 22:38:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-03-10 22:38:37,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:38:37,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:38:37,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:38:37,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-03-10 22:38:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:37,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:37,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-03-10 22:38:37,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146027316] [2021-03-10 22:38:37,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:38:37,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:38:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:38:37,900 INFO L87 Difference]: Start difference. First operand 1149 states and 2742 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) [2021-03-10 22:38:38,519 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2021-03-10 22:38:39,371 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 22:38:39,740 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 22:38:40,142 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:38:40,498 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:38:42,948 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-10 22:38:43,409 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 22:38:43,965 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 22:38:45,341 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:38:45,663 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 22:38:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:46,877 INFO L93 Difference]: Finished difference Result 2454 states and 5970 transitions. [2021-03-10 22:38:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:38:46,881 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 30 [2021-03-10 22:38:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:46,884 INFO L225 Difference]: With dead ends: 2454 [2021-03-10 22:38:46,884 INFO L226 Difference]: Without dead ends: 2434 [2021-03-10 22:38:46,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 6938.3ms TimeCoverageRelationStatistics Valid=444, Invalid=2208, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:38:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-03-10 22:38:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1147. [2021-03-10 22:38:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.3883071553228623) internal successors, (2737), 1146 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2737 transitions. [2021-03-10 22:38:46,898 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2737 transitions. Word has length 30 [2021-03-10 22:38:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:46,898 INFO L480 AbstractCegarLoop]: Abstraction has 1147 states and 2737 transitions. [2021-03-10 22:38:46,898 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) [2021-03-10 22:38:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2737 transitions. [2021-03-10 22:38:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:38:46,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:46,899 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:47,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-03-10 22:38:47,099 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 84697641, now seen corresponding path program 27 times [2021-03-10 22:38:47,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:47,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604374582] [2021-03-10 22:38:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:47,300 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:38:47,635 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:38:47,821 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:38:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:48,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604374582] [2021-03-10 22:38:48,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009540643] [2021-03-10 22:38:48,262 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:48,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:38:48,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:38:48,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:38:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:49,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:38:49,324 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 20 treesize of output 36 [2021-03-10 22:38:49,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:38:49,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:38:49,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:38:49,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-03-10 22:38:49,863 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:38:50,594 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:38:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:50,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:50,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 22:38:50,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892293481] [2021-03-10 22:38:50,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:38:50,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:50,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:38:50,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:38:50,794 INFO L87 Difference]: Start difference. First operand 1147 states and 2737 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:51,004 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2021-03-10 22:38:51,340 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 22:38:51,745 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 22:38:52,427 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 22:38:52,743 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2021-03-10 22:38:53,391 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-10 22:38:54,139 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-10 22:38:54,567 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:38:54,999 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 22:38:55,654 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 22:38:55,977 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 22:38:56,517 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 22:38:57,369 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-10 22:38:58,056 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-10 22:38:59,509 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-03-10 22:39:00,073 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 Received shutdown request... [2021-03-10 22:39:01,003 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-03-10 22:39:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:39:01,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:01,204 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:39:01,207 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:39:01,207 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:39:01 BasicIcfg [2021-03-10 22:39:01,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:39:01,208 INFO L168 Benchmark]: Toolchain (without parser) took 817995.24 ms. Allocated memory was 255.9 MB in the beginning and 583.0 MB in the end (delta: 327.2 MB). Free memory was 236.9 MB in the beginning and 507.1 MB in the end (delta: -270.2 MB). Peak memory consumption was 57.6 MB. Max. memory is 16.0 GB. [2021-03-10 22:39:01,208 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 255.9 MB. Free memory was 238.1 MB in the beginning and 238.0 MB in the end (delta: 67.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:39:01,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.84 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:39:01,208 INFO L168 Benchmark]: Boogie Preprocessor took 21.44 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 233.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:39:01,208 INFO L168 Benchmark]: RCFGBuilder took 272.14 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 236.5 MB in the end (delta: -2.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-10 22:39:01,208 INFO L168 Benchmark]: TraceAbstraction took 817662.13 ms. Allocated memory was 255.9 MB in the beginning and 583.0 MB in the end (delta: 327.2 MB). Free memory was 236.0 MB in the beginning and 507.1 MB in the end (delta: -271.0 MB). Peak memory consumption was 56.5 MB. Max. memory is 16.0 GB. [2021-03-10 22:39:01,208 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 0.17 ms. Allocated memory is still 255.9 MB. Free memory was 238.1 MB in the beginning and 238.0 MB in the end (delta: 67.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.84 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.44 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 233.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 272.14 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 236.5 MB in the end (delta: -2.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 817662.13 ms. Allocated memory was 255.9 MB in the beginning and 583.0 MB in the end (delta: 327.2 MB). Free memory was 236.0 MB in the beginning and 507.1 MB in the end (delta: -271.0 MB). Peak memory consumption was 56.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 65). Cancelled while BasicCegarLoop was constructing difference of abstraction (1147states) and FLOYD_HOARE automaton (currently 29 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 407ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 817550.4ms, OverallIterations: 173, TraceHistogramMax: 2, EmptinessCheckTime: 205.9ms, AutomataDifference: 592001.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4817 SDtfs, 43367 SDslu, 38752 SDs, 0 SdLazy, 195868 SolverSat, 21365 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 113182.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10381 GetRequests, 3429 SyntacticMatches, 565 SemanticMatches, 6386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75399 ImplicationChecksByTransitivity, 456417.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1214occurred in iteration=159, InterpolantAutomatonStates: 5058, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2604.9ms AutomataMinimizationTime, 172 MinimizatonAttempts, 221331 StatesRemovedByMinimization, 172 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 551.3ms SsaConstructionTime, 1748.5ms SatisfiabilityAnalysisTime, 182479.3ms InterpolantComputationTime, 9864 NumberOfCodeBlocks, 9858 NumberOfCodeBlocksAsserted, 596 NumberOfCheckSat, 9520 ConstructedInterpolants, 90 QuantifiedInterpolants, 203036 SizeOfPredicates, 1217 NumberOfNonLiveVariables, 10220 ConjunctsInSsa, 4875 ConjunctsInUnsatCore, 344 InterpolantComputations, 2 PerfectInterpolantSequences, 89/3701 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