/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:16:11,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:16:11,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:16:11,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:16:11,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:16:11,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:16:11,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:16:11,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:16:11,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:16:11,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:16:11,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:16:11,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:16:11,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:16:11,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:16:11,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:16:11,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:16:11,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 16:16:11,175 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 [2021-05-03 16:16:11,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:16:11,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:16:11,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:16:11,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:16:11,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:16:11,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:16:11,215 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:16:11,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:16:11,215 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:16:11,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:16:11,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:16:11,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:16:11,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:16:11,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:16:11,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:16:11,218 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:16:11,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:16:11,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:16:11,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:16:11,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:16:11,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:16:11,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:16:11,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:16:11,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:16:11,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:16:11,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:16:11,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:16:11,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:16:11,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:16:11,220 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:16:11,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:16:11,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:16:11,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:16:11,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:16:11,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:16:11,632 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:16:11,634 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:16:11,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl [2021-05-03 16:16:11,636 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2021-05-03 16:16:11,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:16:11,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:16:11,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:16:11,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:16:11,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:16:11,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:16:11,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:16:11,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:16:11,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:16:11,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/1) ... [2021-05-03 16:16:11,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:16:11,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:16:11,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:16:11,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:16:11,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (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 [2021-05-03 16:16:11,843 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:16:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:16:11,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:16:11,844 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:16:11,844 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:16:11,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:16:11,844 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:16:11,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:16:11,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:16:11,844 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:16:11,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:16:11,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:16:11,846 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:16:12,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:16:12,248 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:16:12,250 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:16:12 BoogieIcfgContainer [2021-05-03 16:16:12,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:16:12,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:16:12,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:16:12,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:16:12,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:11" (1/2) ... [2021-05-03 16:16:12,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac1f56e and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:16:12, skipping insertion in model container [2021-05-03 16:16:12,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:16:12" (2/2) ... [2021-05-03 16:16:12,274 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2021-05-03 16:16:12,280 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:16:12,281 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:16:12,284 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:16:12,285 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:16:12,388 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 16:16:12,416 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 16:16:12,458 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:16:12,458 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:16:12,458 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:16:12,458 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:16:12,458 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:16:12,458 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:16:12,459 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:16:12,459 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:16:12,483 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-05-03 16:16:12,570 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:16:12,601 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:12,602 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:12,603 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash 425333675, now seen corresponding path program 1 times [2021-05-03 16:16:12,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:12,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788351873] [2021-05-03 16:16:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:12,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788351873] [2021-05-03 16:16:12,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:16:12,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:16:12,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888161250] [2021-05-03 16:16:12,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:16:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:16:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:12,815 INFO L87 Difference]: Start difference. First operand has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:12,888 INFO L93 Difference]: Finished difference Result 1114 states and 3313 transitions. [2021-05-03 16:16:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:16:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:16:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:12,917 INFO L225 Difference]: With dead ends: 1114 [2021-05-03 16:16:12,917 INFO L226 Difference]: Without dead ends: 1114 [2021-05-03 16:16:12,919 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-05-03 16:16:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-05-03 16:16:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.976639712488769) internal successors, (3313), 1113 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3313 transitions. [2021-05-03 16:16:13,063 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3313 transitions. Word has length 22 [2021-05-03 16:16:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:13,064 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 3313 transitions. [2021-05-03 16:16:13,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3313 transitions. [2021-05-03 16:16:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:16:13,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:13,072 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:13,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:16:13,072 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:13,079 INFO L82 PathProgramCache]: Analyzing trace with hash -266133116, now seen corresponding path program 1 times [2021-05-03 16:16:13,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:13,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763963544] [2021-05-03 16:16:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:13,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763963544] [2021-05-03 16:16:13,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:16:13,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:16:13,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586535226] [2021-05-03 16:16:13,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:16:13,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:13,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:16:13,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:13,141 INFO L87 Difference]: Start difference. First operand 1114 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:13,163 INFO L93 Difference]: Finished difference Result 1117 states and 3310 transitions. [2021-05-03 16:16:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:16:13,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:16:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:13,171 INFO L225 Difference]: With dead ends: 1117 [2021-05-03 16:16:13,171 INFO L226 Difference]: Without dead ends: 1117 [2021-05-03 16:16:13,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-05-03 16:16:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2021-05-03 16:16:13,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9659498207885306) internal successors, (3310), 1116 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3310 transitions. [2021-05-03 16:16:13,231 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3310 transitions. Word has length 27 [2021-05-03 16:16:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:13,232 INFO L480 AbstractCegarLoop]: Abstraction has 1117 states and 3310 transitions. [2021-05-03 16:16:13,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3310 transitions. [2021-05-03 16:16:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:16:13,237 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:13,237 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:13,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:16:13,240 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash 562503080, now seen corresponding path program 2 times [2021-05-03 16:16:13,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:13,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948669905] [2021-05-03 16:16:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:13,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948669905] [2021-05-03 16:16:13,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:16:13,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:16:13,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471277745] [2021-05-03 16:16:13,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:16:13,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:13,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:16:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:13,321 INFO L87 Difference]: Start difference. First operand 1117 states and 3310 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:13,358 INFO L93 Difference]: Finished difference Result 1228 states and 3641 transitions. [2021-05-03 16:16:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:16:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:16:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:13,367 INFO L225 Difference]: With dead ends: 1228 [2021-05-03 16:16:13,367 INFO L226 Difference]: Without dead ends: 1228 [2021-05-03 16:16:13,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-05-03 16:16:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2021-05-03 16:16:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.967400162999185) internal successors, (3641), 1227 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3641 transitions. [2021-05-03 16:16:13,419 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3641 transitions. Word has length 27 [2021-05-03 16:16:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:13,419 INFO L480 AbstractCegarLoop]: Abstraction has 1228 states and 3641 transitions. [2021-05-03 16:16:13,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3641 transitions. [2021-05-03 16:16:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:16:13,425 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:13,425 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:13,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:16:13,425 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash 630436378, now seen corresponding path program 1 times [2021-05-03 16:16:13,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:13,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025263807] [2021-05-03 16:16:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:13,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025263807] [2021-05-03 16:16:13,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:16:13,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:16:13,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320153653] [2021-05-03 16:16:13,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:16:13,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:16:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:13,468 INFO L87 Difference]: Start difference. First operand 1228 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:13,491 INFO L93 Difference]: Finished difference Result 1783 states and 5179 transitions. [2021-05-03 16:16:13,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:16:13,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:16:13,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:13,500 INFO L225 Difference]: With dead ends: 1783 [2021-05-03 16:16:13,501 INFO L226 Difference]: Without dead ends: 1405 [2021-05-03 16:16:13,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:13,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-05-03 16:16:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1183. [2021-05-03 16:16:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.9382402707275803) internal successors, (3473), 1182 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3473 transitions. [2021-05-03 16:16:13,554 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3473 transitions. Word has length 32 [2021-05-03 16:16:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:13,554 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 3473 transitions. [2021-05-03 16:16:13,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3473 transitions. [2021-05-03 16:16:13,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:16:13,559 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:13,559 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:13,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 16:16:13,560 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:13,560 INFO L82 PathProgramCache]: Analyzing trace with hash -321367481, now seen corresponding path program 1 times [2021-05-03 16:16:13,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:13,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083925883] [2021-05-03 16:16:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:13,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083925883] [2021-05-03 16:16:13,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:16:13,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:16:13,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376522235] [2021-05-03 16:16:13,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:16:13,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:13,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:16:13,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:13,593 INFO L87 Difference]: Start difference. First operand 1183 states and 3473 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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) [2021-05-03 16:16:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:13,606 INFO L93 Difference]: Finished difference Result 915 states and 2610 transitions. [2021-05-03 16:16:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:16:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 37 [2021-05-03 16:16:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:13,612 INFO L225 Difference]: With dead ends: 915 [2021-05-03 16:16:13,613 INFO L226 Difference]: Without dead ends: 915 [2021-05-03 16:16:13,613 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-05-03 16:16:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-05-03 16:16:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.8555798687089715) internal successors, (2610), 914 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2610 transitions. [2021-05-03 16:16:13,649 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2610 transitions. Word has length 37 [2021-05-03 16:16:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:13,649 INFO L480 AbstractCegarLoop]: Abstraction has 915 states and 2610 transitions. [2021-05-03 16:16:13,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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) [2021-05-03 16:16:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2610 transitions. [2021-05-03 16:16:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:16:13,656 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:13,656 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:13,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 16:16:13,656 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:13,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1106779099, now seen corresponding path program 2 times [2021-05-03 16:16:13,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:13,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180931429] [2021-05-03 16:16:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:13,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180931429] [2021-05-03 16:16:13,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322973044] [2021-05-03 16:16:13,773 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 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 [2021-05-03 16:16:13,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:16:13,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:16:13,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:14,092 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 [2021-05-03 16:16:14,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:14,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:14,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:14,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-05-03 16:16:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:14,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:14,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 16:16:14,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469979561] [2021-05-03 16:16:14,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:16:14,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:14,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:16:14,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:16:14,217 INFO L87 Difference]: Start difference. First operand 915 states and 2610 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:14,333 INFO L93 Difference]: Finished difference Result 1329 states and 3816 transitions. [2021-05-03 16:16:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:16:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:16:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:14,341 INFO L225 Difference]: With dead ends: 1329 [2021-05-03 16:16:14,342 INFO L226 Difference]: Without dead ends: 1329 [2021-05-03 16:16:14,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:16:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-05-03 16:16:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1260. [2021-05-03 16:16:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.871326449563145) internal successors, (3615), 1259 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 3615 transitions. [2021-05-03 16:16:14,411 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 3615 transitions. Word has length 37 [2021-05-03 16:16:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:14,414 INFO L480 AbstractCegarLoop]: Abstraction has 1260 states and 3615 transitions. [2021-05-03 16:16:14,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 3615 transitions. [2021-05-03 16:16:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 16:16:14,425 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:14,427 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:14,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-03 16:16:14,653 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1059420440, now seen corresponding path program 3 times [2021-05-03 16:16:14,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:14,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113543574] [2021-05-03 16:16:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:14,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113543574] [2021-05-03 16:16:14,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568432321] [2021-05-03 16:16:14,810 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 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 [2021-05-03 16:16:14,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:16:14,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:14,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:16:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:16:14,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 16:16:14,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-05-03 16:16:14,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588477446] [2021-05-03 16:16:14,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:16:14,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:14,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:16:14,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:16:14,959 INFO L87 Difference]: Start difference. First operand 1260 states and 3615 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 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) [2021-05-03 16:16:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:14,997 INFO L93 Difference]: Finished difference Result 2714 states and 7974 transitions. [2021-05-03 16:16:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:16:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 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 42 [2021-05-03 16:16:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:15,013 INFO L225 Difference]: With dead ends: 2714 [2021-05-03 16:16:15,013 INFO L226 Difference]: Without dead ends: 2693 [2021-05-03 16:16:15,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:16:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-03 16:16:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2421. [2021-05-03 16:16:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.997520661157025) internal successors, (7254), 2420 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 7254 transitions. [2021-05-03 16:16:15,115 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 7254 transitions. Word has length 42 [2021-05-03 16:16:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:15,115 INFO L480 AbstractCegarLoop]: Abstraction has 2421 states and 7254 transitions. [2021-05-03 16:16:15,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 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) [2021-05-03 16:16:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 7254 transitions. [2021-05-03 16:16:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 16:16:15,124 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:15,124 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:15,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:15,337 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash 41400296, now seen corresponding path program 4 times [2021-05-03 16:16:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:15,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325379096] [2021-05-03 16:16:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:15,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325379096] [2021-05-03 16:16:15,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382689408] [2021-05-03 16:16:15,427 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 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 [2021-05-03 16:16:15,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:16:15,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 16:16:15,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:15,568 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 [2021-05-03 16:16:15,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:15,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:15,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:15,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-05-03 16:16:15,626 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 [2021-05-03 16:16:15,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:15,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:15,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:15,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-05-03 16:16:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:15,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:15,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 16:16:15,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727396977] [2021-05-03 16:16:15,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:16:15,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:15,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:16:15,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:16:15,673 INFO L87 Difference]: Start difference. First operand 2421 states and 7254 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-05-03 16:16:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:15,904 INFO L93 Difference]: Finished difference Result 2592 states and 7796 transitions. [2021-05-03 16:16:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:16:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 42 [2021-05-03 16:16:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:15,922 INFO L225 Difference]: With dead ends: 2592 [2021-05-03 16:16:15,923 INFO L226 Difference]: Without dead ends: 2592 [2021-05-03 16:16:15,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:16:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-05-03 16:16:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2369. [2021-05-03 16:16:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 3.00464527027027) internal successors, (7115), 2368 states have internal predecessors, (7115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 7115 transitions. [2021-05-03 16:16:16,030 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 7115 transitions. Word has length 42 [2021-05-03 16:16:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:16,030 INFO L480 AbstractCegarLoop]: Abstraction has 2369 states and 7115 transitions. [2021-05-03 16:16:16,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-05-03 16:16:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 7115 transitions. [2021-05-03 16:16:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:16:16,038 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:16,039 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:16,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:16,253 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:16,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2037460374, now seen corresponding path program 5 times [2021-05-03 16:16:16,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:16,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298212060] [2021-05-03 16:16:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:16,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298212060] [2021-05-03 16:16:16,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657436444] [2021-05-03 16:16:16,313 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 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 [2021-05-03 16:16:16,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:16:16,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:16,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:16:16,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:16,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:16,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-05-03 16:16:16,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424056233] [2021-05-03 16:16:16,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:16:16,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:16:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:16:16,510 INFO L87 Difference]: Start difference. First operand 2369 states and 7115 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:16,551 INFO L93 Difference]: Finished difference Result 4663 states and 13882 transitions. [2021-05-03 16:16:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:16:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:16:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:16,599 INFO L225 Difference]: With dead ends: 4663 [2021-05-03 16:16:16,599 INFO L226 Difference]: Without dead ends: 4635 [2021-05-03 16:16:16,600 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:16:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-05-03 16:16:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3953. [2021-05-03 16:16:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 3.0587044534412957) internal successors, (12088), 3952 states have internal predecessors, (12088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 12088 transitions. [2021-05-03 16:16:16,806 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 12088 transitions. Word has length 47 [2021-05-03 16:16:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:16,810 INFO L480 AbstractCegarLoop]: Abstraction has 3953 states and 12088 transitions. [2021-05-03 16:16:16,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 12088 transitions. [2021-05-03 16:16:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:16:16,822 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:16,823 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:17,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:17,045 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 31320406, now seen corresponding path program 6 times [2021-05-03 16:16:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:17,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807682768] [2021-05-03 16:16:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:16:17,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807682768] [2021-05-03 16:16:17,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329868793] [2021-05-03 16:16:17,327 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 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 [2021-05-03 16:16:17,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:16:17,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:17,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:16:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:17,468 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 [2021-05-03 16:16:17,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:17,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:17,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:17,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-05-03 16:16:17,590 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 [2021-05-03 16:16:17,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:17,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:17,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:17,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-05-03 16:16:17,670 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 17 treesize of output 9 [2021-05-03 16:16:17,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:17,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:17,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:17,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:15 [2021-05-03 16:16:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:17,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:17,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:16:17,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448141372] [2021-05-03 16:16:17,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:16:17,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:16:17,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:16:17,916 INFO L87 Difference]: Start difference. First operand 3953 states and 12088 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:18,713 INFO L93 Difference]: Finished difference Result 4432 states and 13258 transitions. [2021-05-03 16:16:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:16:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:16:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:18,732 INFO L225 Difference]: With dead ends: 4432 [2021-05-03 16:16:18,742 INFO L226 Difference]: Without dead ends: 4125 [2021-05-03 16:16:18,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 766.4ms TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:16:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-05-03 16:16:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3885. [2021-05-03 16:16:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.058444902162719) internal successors, (11879), 3884 states have internal predecessors, (11879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 11879 transitions. [2021-05-03 16:16:18,884 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 11879 transitions. Word has length 47 [2021-05-03 16:16:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:18,885 INFO L480 AbstractCegarLoop]: Abstraction has 3885 states and 11879 transitions. [2021-05-03 16:16:18,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 11879 transitions. [2021-05-03 16:16:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-03 16:16:18,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:18,899 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:19,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 16:16:19,113 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2006073215, now seen corresponding path program 7 times [2021-05-03 16:16:19,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:19,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662893772] [2021-05-03 16:16:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:16:19,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662893772] [2021-05-03 16:16:19,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495264638] [2021-05-03 16:16:19,156 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 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 [2021-05-03 16:16:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:19,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:16:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 16:16:19,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 16:16:19,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-05-03 16:16:19,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308574501] [2021-05-03 16:16:19,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:16:19,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:19,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:16:19,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:16:19,291 INFO L87 Difference]: Start difference. First operand 3885 states and 11879 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 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) [2021-05-03 16:16:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:19,301 INFO L93 Difference]: Finished difference Result 836 states and 2021 transitions. [2021-05-03 16:16:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:16:19,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 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 52 [2021-05-03 16:16:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:19,304 INFO L225 Difference]: With dead ends: 836 [2021-05-03 16:16:19,304 INFO L226 Difference]: Without dead ends: 790 [2021-05-03 16:16:19,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:16:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-05-03 16:16:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 689. [2021-05-03 16:16:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.457848837209302) internal successors, (1691), 688 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1691 transitions. [2021-05-03 16:16:19,323 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1691 transitions. Word has length 52 [2021-05-03 16:16:19,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:19,323 INFO L480 AbstractCegarLoop]: Abstraction has 689 states and 1691 transitions. [2021-05-03 16:16:19,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 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) [2021-05-03 16:16:19,323 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1691 transitions. [2021-05-03 16:16:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-03 16:16:19,326 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:19,326 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:19,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:19,549 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash 535250071, now seen corresponding path program 8 times [2021-05-03 16:16:19,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:19,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912619841] [2021-05-03 16:16:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:16:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912619841] [2021-05-03 16:16:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931925576] [2021-05-03 16:16:19,732 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 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 [2021-05-03 16:16:19,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:16:19,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 16:16:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:19,870 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 [2021-05-03 16:16:19,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:19,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:19,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:19,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-05-03 16:16:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:16:19,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:19,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-03 16:16:19,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788282392] [2021-05-03 16:16:19,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:16:19,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:16:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:16:19,917 INFO L87 Difference]: Start difference. First operand 689 states and 1691 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:20,034 INFO L93 Difference]: Finished difference Result 629 states and 1516 transitions. [2021-05-03 16:16:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:16:20,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-03 16:16:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:20,037 INFO L225 Difference]: With dead ends: 629 [2021-05-03 16:16:20,037 INFO L226 Difference]: Without dead ends: 629 [2021-05-03 16:16:20,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:16:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-05-03 16:16:20,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-05-03 16:16:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.4140127388535033) internal successors, (1516), 628 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1516 transitions. [2021-05-03 16:16:20,054 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1516 transitions. Word has length 52 [2021-05-03 16:16:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:20,056 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 1516 transitions. [2021-05-03 16:16:20,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1516 transitions. [2021-05-03 16:16:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-03 16:16:20,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:20,058 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:20,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:20,285 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1828697708, now seen corresponding path program 9 times [2021-05-03 16:16:20,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:20,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156137874] [2021-05-03 16:16:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:16:20,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156137874] [2021-05-03 16:16:20,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291429409] [2021-05-03 16:16:20,569 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 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 [2021-05-03 16:16:20,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:16:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:16:20,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:21,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:16:21,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:16:21,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:21,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:21,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:16:21,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:29 [2021-05-03 16:16:21,118 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 7 treesize of output 5 [2021-05-03 16:16:21,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:21,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:21,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:16:21,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:29 [2021-05-03 16:16:21,282 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-05-03 16:16:21,282 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 16 treesize of output 30 [2021-05-03 16:16:21,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:21,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:21,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:21,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:28 [2021-05-03 16:16:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:16:21,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:21,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-05-03 16:16:21,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546238847] [2021-05-03 16:16:21,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:16:21,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:16:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:16:21,566 INFO L87 Difference]: Start difference. First operand 629 states and 1516 transitions. Second operand has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:22,646 INFO L93 Difference]: Finished difference Result 619 states and 1454 transitions. [2021-05-03 16:16:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:16:22,647 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-03 16:16:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:22,648 INFO L225 Difference]: With dead ends: 619 [2021-05-03 16:16:22,649 INFO L226 Difference]: Without dead ends: 619 [2021-05-03 16:16:22,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1075.7ms TimeCoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:16:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-05-03 16:16:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 584. [2021-05-03 16:16:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.3825042881646654) internal successors, (1389), 583 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1389 transitions. [2021-05-03 16:16:22,662 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1389 transitions. Word has length 57 [2021-05-03 16:16:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:22,662 INFO L480 AbstractCegarLoop]: Abstraction has 584 states and 1389 transitions. [2021-05-03 16:16:22,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1389 transitions. [2021-05-03 16:16:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-03 16:16:22,665 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:22,665 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:22,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 16:16:22,881 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1694652934, now seen corresponding path program 10 times [2021-05-03 16:16:22,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:22,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885794560] [2021-05-03 16:16:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:16:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885794560] [2021-05-03 16:16:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748672162] [2021-05-03 16:16:23,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:16:23,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:16:23,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:23,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:16:23,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:23,303 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 [2021-05-03 16:16:23,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:23,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:23,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:23,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-05-03 16:16:23,344 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 [2021-05-03 16:16:23,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:23,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:23,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:23,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-05-03 16:16:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:16:23,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:23,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2021-05-03 16:16:23,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399498138] [2021-05-03 16:16:23,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:16:23,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:16:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:16:23,389 INFO L87 Difference]: Start difference. First operand 584 states and 1389 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:23,829 INFO L93 Difference]: Finished difference Result 578 states and 1357 transitions. [2021-05-03 16:16:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:16:23,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-03 16:16:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:23,831 INFO L225 Difference]: With dead ends: 578 [2021-05-03 16:16:23,831 INFO L226 Difference]: Without dead ends: 578 [2021-05-03 16:16:23,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 392.4ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:16:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-05-03 16:16:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 559. [2021-05-03 16:16:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.347670250896057) internal successors, (1310), 558 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1310 transitions. [2021-05-03 16:16:23,846 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1310 transitions. Word has length 57 [2021-05-03 16:16:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:23,846 INFO L480 AbstractCegarLoop]: Abstraction has 559 states and 1310 transitions. [2021-05-03 16:16:23,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1310 transitions. [2021-05-03 16:16:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-03 16:16:23,848 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:23,848 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:24,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:24,077 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1465250578, now seen corresponding path program 11 times [2021-05-03 16:16:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:24,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027575007] [2021-05-03 16:16:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:24,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027575007] [2021-05-03 16:16:24,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257609263] [2021-05-03 16:16:24,960 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 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 [2021-05-03 16:16:25,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:16:25,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:25,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-03 16:16:25,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:25,718 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-03 16:16:25,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:16:25,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:25,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:25,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:25,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:51 [2021-05-03 16:16:25,862 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:16:25,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:16:25,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:25,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:25,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:25,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:35 [2021-05-03 16:16:26,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:16:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:16:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:16:26,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:16:26,013 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 36 treesize of output 20 [2021-05-03 16:16:26,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:16:26,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:16:26,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:16:26,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:17 [2021-05-03 16:16:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:16:26,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:26,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2021-05-03 16:16:26,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100777927] [2021-05-03 16:16:26,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-03 16:16:26,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:26,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-03 16:16:26,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:16:26,211 INFO L87 Difference]: Start difference. First operand 559 states and 1310 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:29,085 INFO L93 Difference]: Finished difference Result 653 states and 1524 transitions. [2021-05-03 16:16:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:16:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-05-03 16:16:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:29,090 INFO L225 Difference]: With dead ends: 653 [2021-05-03 16:16:29,090 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 16:16:29,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 3445.4ms TimeCoverageRelationStatistics Valid=539, Invalid=3751, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 16:16:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 16:16:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 16:16:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 16:16:29,092 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-05-03 16:16:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:29,092 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 16:16:29,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 16:16:29,092 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 16:16:29,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:29,310 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:16:29 BasicIcfg [2021-05-03 16:16:29,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:16:29,311 INFO L168 Benchmark]: Toolchain (without parser) took 17600.68 ms. Allocated memory was 327.2 MB in the beginning and 587.2 MB in the end (delta: 260.0 MB). Free memory was 306.7 MB in the beginning and 522.0 MB in the end (delta: -215.3 MB). Peak memory consumption was 46.5 MB. Max. memory is 16.0 GB. [2021-05-03 16:16:29,311 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 327.2 MB. Free memory was 308.0 MB in the beginning and 307.9 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:16:29,311 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.26 ms. Allocated memory is still 327.2 MB. Free memory was 306.6 MB in the beginning and 305.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:16:29,311 INFO L168 Benchmark]: Boogie Preprocessor took 20.17 ms. Allocated memory is still 327.2 MB. Free memory was 305.2 MB in the beginning and 304.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:16:29,311 INFO L168 Benchmark]: RCFGBuilder took 482.85 ms. Allocated memory is still 327.2 MB. Free memory was 304.0 MB in the beginning and 286.3 MB in the end (delta: 17.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-05-03 16:16:29,311 INFO L168 Benchmark]: TraceAbstraction took 17058.17 ms. Allocated memory was 327.2 MB in the beginning and 587.2 MB in the end (delta: 260.0 MB). Free memory was 285.9 MB in the beginning and 522.0 MB in the end (delta: -236.1 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.0 GB. [2021-05-03 16:16:29,312 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 0.18 ms. Allocated memory is still 327.2 MB. Free memory was 308.0 MB in the beginning and 307.9 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 32.26 ms. Allocated memory is still 327.2 MB. Free memory was 306.6 MB in the beginning and 305.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.17 ms. Allocated memory is still 327.2 MB. Free memory was 305.2 MB in the beginning and 304.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 482.85 ms. Allocated memory is still 327.2 MB. Free memory was 304.0 MB in the beginning and 286.3 MB in the end (delta: 17.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 17058.17 ms. Allocated memory was 327.2 MB in the beginning and 587.2 MB in the end (delta: 260.0 MB). Free memory was 285.9 MB in the beginning and 522.0 MB in the end (delta: -236.1 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 104]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16850.4ms, OverallIterations: 15, TraceHistogramMax: 3, EmptinessCheckTime: 117.6ms, AutomataDifference: 6149.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 111.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 852 SDtfs, 2298 SDslu, 5059 SDs, 0 SdLazy, 2724 SolverSat, 448 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1830.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 452 SyntacticMatches, 6 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 6129.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3953occurred in iteration=9, InterpolantAutomatonStates: 143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1012.8ms AutomataMinimizationTime, 15 MinimizatonAttempts, 1863 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 159.1ms SsaConstructionTime, 561.7ms SatisfiabilityAnalysisTime, 6007.7ms InterpolantComputationTime, 1135 NumberOfCodeBlocks, 1135 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1110 ConstructedInterpolants, 13 QuantifiedInterpolants, 7302 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1280 ConjunctsInSsa, 171 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 166/407 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 proved your program to be correct! Received shutdown request...