/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-dev-29289db [2021-06-05 06:13:43,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:13:43,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:13:43,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:13:44,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:13:44,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:13:44,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:13:44,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:13:44,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:13:44,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:13:44,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:13:44,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:13:44,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:13:44,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:13:44,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:13:44,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:13:44,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 06:13:44,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:13:44,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:13:44,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:13:44,141 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 [2021-06-05 06:13:44,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:13:44,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:13:44,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:13:44,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:13:44,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:13:44,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:13:44,176 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:13:44,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:13:44,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:13:44,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:13:44,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:13:44,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:13:44,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:13:44,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:13:44,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:13:44,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:13:44,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:13:44,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:13:44,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:13:44,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:13:44,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:13:44,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:13:44,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:13:44,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:13:44,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:13:44,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:13:44,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:13:44,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:13:44,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:13:44,180 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:13:44,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:13:44,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:13:44,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:13:44,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:13:44,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:13:44,472 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:13:44,473 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:13:44,473 INFO L432 ainManager$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 [2021-06-05 06:13:44,474 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2021-06-05 06:13:44,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:13:44,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:13:44,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:13:44,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:13:44,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:13:44,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:13:44,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:13:44,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:13:44,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:13:44,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/1) ... [2021-06-05 06:13:44,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:13:44,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:13:44,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:13:44,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:13:44,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (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 [2021-06-05 06:13:44,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:13:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:13:44,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:13:44,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:13:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:13:44,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:13:44,621 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:13:44,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:13:44,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:13:44,621 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:13:44,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:13:44,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:13:44,624 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:13:44,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:13:44,866 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:13:44,868 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:13:44 BoogieIcfgContainer [2021-06-05 06:13:44,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:13:44,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:13:44,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:13:44,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:13:44,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:44" (1/2) ... [2021-06-05 06:13:44,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490485f9 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:13:44, skipping insertion in model container [2021-06-05 06:13:44,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:13:44" (2/2) ... [2021-06-05 06:13:44,896 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2021-06-05 06:13:44,901 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:13:44,901 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:13:44,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:13:44,902 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:13:44,934 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:13:44,954 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:13:44,971 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:13:44,971 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:13:44,972 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:13:44,972 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:13:44,972 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:13:44,972 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:13:44,972 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:13:44,972 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:13:44,980 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-06-05 06:13:45,049 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) [2021-06-05 06:13:45,053 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) [2021-06-05 06:13:45,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:13:45,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:45,078 INFO L521 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] [2021-06-05 06:13:45,079 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:45,087 INFO L82 PathProgramCache]: Analyzing trace with hash 425333675, now seen corresponding path program 1 times [2021-06-05 06:13:45,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:45,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009823301] [2021-06-05 06:13:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:45,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:45,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009823301] [2021-06-05 06:13:45,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009823301] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:45,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:13:45,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:13:45,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240506052] [2021-06-05 06:13:45,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:13:45,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:13:45,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:45,265 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) [2021-06-05 06:13:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:45,326 INFO L93 Difference]: Finished difference Result 1114 states and 3313 transitions. [2021-06-05 06:13:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:13:45,328 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 [2021-06-05 06:13:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:45,355 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 06:13:45,356 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 06:13:45,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 06:13:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-06-05 06:13:45,466 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) [2021-06-05 06:13:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3313 transitions. [2021-06-05 06:13:45,475 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3313 transitions. Word has length 22 [2021-06-05 06:13:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:45,476 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3313 transitions. [2021-06-05 06:13:45,476 INFO L483 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) [2021-06-05 06:13:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3313 transitions. [2021-06-05 06:13:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:13:45,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:45,481 INFO L521 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] [2021-06-05 06:13:45,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:13:45,482 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:45,486 INFO L82 PathProgramCache]: Analyzing trace with hash -765277692, now seen corresponding path program 1 times [2021-06-05 06:13:45,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:45,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179393746] [2021-06-05 06:13:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:45,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:45,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179393746] [2021-06-05 06:13:45,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179393746] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:45,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:13:45,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:13:45,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6429920] [2021-06-05 06:13:45,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:13:45,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:45,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:13:45,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:45,554 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) [2021-06-05 06:13:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:45,577 INFO L93 Difference]: Finished difference Result 1117 states and 3310 transitions. [2021-06-05 06:13:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:13:45,578 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 [2021-06-05 06:13:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:45,583 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 06:13:45,583 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 06:13:45,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 06:13:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2021-06-05 06:13:45,618 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) [2021-06-05 06:13:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3310 transitions. [2021-06-05 06:13:45,623 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3310 transitions. Word has length 27 [2021-06-05 06:13:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:45,623 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3310 transitions. [2021-06-05 06:13:45,624 INFO L483 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) [2021-06-05 06:13:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3310 transitions. [2021-06-05 06:13:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:13:45,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:45,629 INFO L521 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] [2021-06-05 06:13:45,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:13:45,630 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash 562503080, now seen corresponding path program 2 times [2021-06-05 06:13:45,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:45,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342370354] [2021-06-05 06:13:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:13:45,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:45,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342370354] [2021-06-05 06:13:45,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342370354] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:45,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:13:45,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:13:45,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504129541] [2021-06-05 06:13:45,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:13:45,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:45,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:13:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:45,695 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) [2021-06-05 06:13:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:45,728 INFO L93 Difference]: Finished difference Result 1228 states and 3641 transitions. [2021-06-05 06:13:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:13:45,737 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 [2021-06-05 06:13:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:45,744 INFO L225 Difference]: With dead ends: 1228 [2021-06-05 06:13:45,744 INFO L226 Difference]: Without dead ends: 1228 [2021-06-05 06:13:45,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-05 06:13:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2021-06-05 06:13:45,783 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) [2021-06-05 06:13:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3641 transitions. [2021-06-05 06:13:45,789 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3641 transitions. Word has length 27 [2021-06-05 06:13:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:45,790 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3641 transitions. [2021-06-05 06:13:45,790 INFO L483 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) [2021-06-05 06:13:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3641 transitions. [2021-06-05 06:13:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:13:45,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:45,794 INFO L521 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] [2021-06-05 06:13:45,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:13:45,795 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash 630436378, now seen corresponding path program 1 times [2021-06-05 06:13:45,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:45,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173197802] [2021-06-05 06:13:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:13:45,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:45,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173197802] [2021-06-05 06:13:45,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173197802] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:45,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:13:45,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:13:45,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228030204] [2021-06-05 06:13:45,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:13:45,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:45,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:13:45,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:45,860 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) [2021-06-05 06:13:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:45,881 INFO L93 Difference]: Finished difference Result 1783 states and 5179 transitions. [2021-06-05 06:13:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:13:45,882 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 [2021-06-05 06:13:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:45,889 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 06:13:45,890 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 06:13:45,890 INFO L777 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 [2021-06-05 06:13:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 06:13:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1183. [2021-06-05 06:13:45,918 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) [2021-06-05 06:13:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3473 transitions. [2021-06-05 06:13:45,923 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3473 transitions. Word has length 32 [2021-06-05 06:13:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:45,923 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3473 transitions. [2021-06-05 06:13:45,923 INFO L483 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) [2021-06-05 06:13:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3473 transitions. [2021-06-05 06:13:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:13:45,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:45,930 INFO L521 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] [2021-06-05 06:13:45,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 06:13:45,931 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash -321367481, now seen corresponding path program 1 times [2021-06-05 06:13:45,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:45,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860479222] [2021-06-05 06:13:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:13:45,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:45,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860479222] [2021-06-05 06:13:45,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860479222] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:45,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:13:45,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:13:45,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063791930] [2021-06-05 06:13:45,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:13:45,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:13:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:45,984 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) [2021-06-05 06:13:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:45,995 INFO L93 Difference]: Finished difference Result 915 states and 2610 transitions. [2021-06-05 06:13:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:13:45,996 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 [2021-06-05 06:13:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:46,000 INFO L225 Difference]: With dead ends: 915 [2021-06-05 06:13:46,000 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 06:13:46,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 06:13:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-06-05 06:13:46,019 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) [2021-06-05 06:13:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2610 transitions. [2021-06-05 06:13:46,022 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2610 transitions. Word has length 37 [2021-06-05 06:13:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:46,023 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2610 transitions. [2021-06-05 06:13:46,023 INFO L483 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) [2021-06-05 06:13:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2610 transitions. [2021-06-05 06:13:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:13:46,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:46,025 INFO L521 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] [2021-06-05 06:13:46,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:13:46,026 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1106779099, now seen corresponding path program 2 times [2021-06-05 06:13:46,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:46,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16168286] [2021-06-05 06:13:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:13:46,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:46,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16168286] [2021-06-05 06:13:46,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16168286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:46,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950977034] [2021-06-05 06:13:46,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:13:46,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:13:46,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:46,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:13:46,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:46,382 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 [2021-06-05 06:13:46,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:46,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:46,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:46,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:13:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:13:46,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950977034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:46,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:46,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 06:13:46,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155035774] [2021-06-05 06:13:46,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:13:46,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:46,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:13:46,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:13:46,482 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) [2021-06-05 06:13:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:46,615 INFO L93 Difference]: Finished difference Result 1329 states and 3816 transitions. [2021-06-05 06:13:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:13:46,617 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 [2021-06-05 06:13:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:46,622 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 06:13:46,622 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 06:13:46,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:13:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 06:13:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1260. [2021-06-05 06:13:46,660 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) [2021-06-05 06:13:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 3615 transitions. [2021-06-05 06:13:46,664 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 3615 transitions. Word has length 37 [2021-06-05 06:13:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:46,665 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 3615 transitions. [2021-06-05 06:13:46,666 INFO L483 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) [2021-06-05 06:13:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 3615 transitions. [2021-06-05 06:13:46,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 06:13:46,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:46,669 INFO L521 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] [2021-06-05 06:13:46,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 06:13:46,892 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1059420440, now seen corresponding path program 3 times [2021-06-05 06:13:46,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:46,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160629472] [2021-06-05 06:13:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:13:47,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:47,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160629472] [2021-06-05 06:13:47,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160629472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:47,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346413943] [2021-06-05 06:13:47,026 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 [2021-06-05 06:13:47,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:13:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:13:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:13:47,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346413943] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:47,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 06:13:47,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-06-05 06:13:47,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757892351] [2021-06-05 06:13:47,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:13:47,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:47,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:13:47,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:13:47,180 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) [2021-06-05 06:13:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:47,206 INFO L93 Difference]: Finished difference Result 2714 states and 7974 transitions. [2021-06-05 06:13:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:13:47,206 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 [2021-06-05 06:13:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:47,218 INFO L225 Difference]: With dead ends: 2714 [2021-06-05 06:13:47,219 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 06:13:47,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:13:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 06:13:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2421. [2021-06-05 06:13:47,274 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) [2021-06-05 06:13:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 7254 transitions. [2021-06-05 06:13:47,283 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 7254 transitions. Word has length 42 [2021-06-05 06:13:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:47,283 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 7254 transitions. [2021-06-05 06:13:47,283 INFO L483 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) [2021-06-05 06:13:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 7254 transitions. [2021-06-05 06:13:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 06:13:47,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:47,289 INFO L521 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] [2021-06-05 06:13:47,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:47,505 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash 41400296, now seen corresponding path program 4 times [2021-06-05 06:13:47,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:47,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025595983] [2021-06-05 06:13:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:47,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:47,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025595983] [2021-06-05 06:13:47,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025595983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:47,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57307040] [2021-06-05 06:13:47,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:13:47,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:13:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:13:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:47,714 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 [2021-06-05 06:13:47,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:47,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:47,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:47,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 06:13:47,765 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 [2021-06-05 06:13:47,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:47,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:47,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:47,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:13:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:47,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57307040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:47,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:47,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 06:13:47,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109659554] [2021-06-05 06:13:47,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:13:47,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:13:47,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:13:47,814 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) [2021-06-05 06:13:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:48,003 INFO L93 Difference]: Finished difference Result 2592 states and 7796 transitions. [2021-06-05 06:13:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:13:48,004 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 [2021-06-05 06:13:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:48,015 INFO L225 Difference]: With dead ends: 2592 [2021-06-05 06:13:48,015 INFO L226 Difference]: Without dead ends: 2592 [2021-06-05 06:13:48,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:13:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-06-05 06:13:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2369. [2021-06-05 06:13:48,066 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) [2021-06-05 06:13:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 7115 transitions. [2021-06-05 06:13:48,074 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 7115 transitions. Word has length 42 [2021-06-05 06:13:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:48,074 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 7115 transitions. [2021-06-05 06:13:48,074 INFO L483 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) [2021-06-05 06:13:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 7115 transitions. [2021-06-05 06:13:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 06:13:48,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:48,080 INFO L521 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] [2021-06-05 06:13:48,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:48,293 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2037460374, now seen corresponding path program 5 times [2021-06-05 06:13:48,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:48,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634657980] [2021-06-05 06:13:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:48,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:48,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634657980] [2021-06-05 06:13:48,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634657980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:48,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057171861] [2021-06-05 06:13:48,354 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 [2021-06-05 06:13:48,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:13:48,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:48,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:13:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:13:48,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057171861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:48,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:48,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-05 06:13:48,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461972274] [2021-06-05 06:13:48,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:13:48,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:48,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:13:48,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:13:48,481 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) [2021-06-05 06:13:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:48,518 INFO L93 Difference]: Finished difference Result 4663 states and 13882 transitions. [2021-06-05 06:13:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:13:48,519 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 [2021-06-05 06:13:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:48,542 INFO L225 Difference]: With dead ends: 4663 [2021-06-05 06:13:48,542 INFO L226 Difference]: Without dead ends: 4635 [2021-06-05 06:13:48,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:13:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-06-05 06:13:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3953. [2021-06-05 06:13:48,641 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) [2021-06-05 06:13:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 12088 transitions. [2021-06-05 06:13:48,654 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 12088 transitions. Word has length 47 [2021-06-05 06:13:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:48,654 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 12088 transitions. [2021-06-05 06:13:48,654 INFO L483 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) [2021-06-05 06:13:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 12088 transitions. [2021-06-05 06:13:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 06:13:48,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:48,662 INFO L521 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] [2021-06-05 06:13:48,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:48,885 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:48,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash 31320406, now seen corresponding path program 6 times [2021-06-05 06:13:48,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:48,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287739857] [2021-06-05 06:13:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:49,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:49,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287739857] [2021-06-05 06:13:49,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287739857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:49,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346576514] [2021-06-05 06:13:49,141 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 [2021-06-05 06:13:49,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:13:49,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:13:49,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:49,284 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 [2021-06-05 06:13:49,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:49,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:49,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:49,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 06:13:49,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:13:49,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:49,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:49,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:49,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 06:13:49,439 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 [2021-06-05 06:13:49,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:49,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:49,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:49,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:15 [2021-06-05 06:13:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:49,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346576514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:49,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:49,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 06:13:49,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724755726] [2021-06-05 06:13:49,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:13:49,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:49,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:13:49,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:13:49,594 INFO L87 Difference]: Start difference. First operand 3953 states and 12088 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:50,208 INFO L93 Difference]: Finished difference Result 4432 states and 13258 transitions. [2021-06-05 06:13:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:13:50,214 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 06:13:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:50,232 INFO L225 Difference]: With dead ends: 4432 [2021-06-05 06:13:50,233 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 06:13:50,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:13:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 06:13:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3885. [2021-06-05 06:13:50,314 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) [2021-06-05 06:13:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 11879 transitions. [2021-06-05 06:13:50,325 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 11879 transitions. Word has length 47 [2021-06-05 06:13:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:50,325 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 11879 transitions. [2021-06-05 06:13:50,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 11879 transitions. [2021-06-05 06:13:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 06:13:50,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:50,333 INFO L521 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] [2021-06-05 06:13:50,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 06:13:50,557 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2006073215, now seen corresponding path program 7 times [2021-06-05 06:13:50,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:50,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529832245] [2021-06-05 06:13:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:13:50,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:50,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529832245] [2021-06-05 06:13:50,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529832245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:50,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550378513] [2021-06-05 06:13:50,632 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 [2021-06-05 06:13:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:50,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:13:50,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:13:50,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550378513] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:50,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 06:13:50,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-06-05 06:13:50,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497347614] [2021-06-05 06:13:50,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:13:50,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:13:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:13:50,761 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) [2021-06-05 06:13:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:50,767 INFO L93 Difference]: Finished difference Result 836 states and 2021 transitions. [2021-06-05 06:13:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:13:50,767 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 [2021-06-05 06:13:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:50,769 INFO L225 Difference]: With dead ends: 836 [2021-06-05 06:13:50,770 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 06:13:50,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:13:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 06:13:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 689. [2021-06-05 06:13:50,781 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) [2021-06-05 06:13:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1691 transitions. [2021-06-05 06:13:50,782 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1691 transitions. Word has length 52 [2021-06-05 06:13:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:50,783 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 1691 transitions. [2021-06-05 06:13:50,783 INFO L483 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) [2021-06-05 06:13:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1691 transitions. [2021-06-05 06:13:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 06:13:50,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:50,785 INFO L521 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] [2021-06-05 06:13:51,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:51,005 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash 535250071, now seen corresponding path program 8 times [2021-06-05 06:13:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:51,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760274916] [2021-06-05 06:13:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:13:51,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:51,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760274916] [2021-06-05 06:13:51,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760274916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:51,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924794540] [2021-06-05 06:13:51,121 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 [2021-06-05 06:13:51,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:13:51,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:13:51,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:51,219 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 [2021-06-05 06:13:51,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:51,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:51,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:51,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:13:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:13:51,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924794540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:51,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:51,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 06:13:51,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330935440] [2021-06-05 06:13:51,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:13:51,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:51,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:13:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:13:51,248 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) [2021-06-05 06:13:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:51,325 INFO L93 Difference]: Finished difference Result 629 states and 1516 transitions. [2021-06-05 06:13:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:13:51,327 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 [2021-06-05 06:13:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:51,328 INFO L225 Difference]: With dead ends: 629 [2021-06-05 06:13:51,328 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 06:13:51,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:13:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 06:13:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-06-05 06:13:51,336 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) [2021-06-05 06:13:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1516 transitions. [2021-06-05 06:13:51,337 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1516 transitions. Word has length 52 [2021-06-05 06:13:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:51,338 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1516 transitions. [2021-06-05 06:13:51,338 INFO L483 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) [2021-06-05 06:13:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1516 transitions. [2021-06-05 06:13:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 06:13:51,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:51,339 INFO L521 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] [2021-06-05 06:13:51,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:51,553 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1828697708, now seen corresponding path program 9 times [2021-06-05 06:13:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:51,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393745063] [2021-06-05 06:13:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:13:51,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:51,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393745063] [2021-06-05 06:13:51,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393745063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:51,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170040076] [2021-06-05 06:13:51,779 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 [2021-06-05 06:13:51,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:13:51,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:51,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:13:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:52,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:52,029 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 11 treesize of output 15 [2021-06-05 06:13:52,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:13:52,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:52,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:52,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2021-06-05 06:13:52,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:13:52,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:13:52,149 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 [2021-06-05 06:13:52,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:13:52,154 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 [2021-06-05 06:13:52,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:52,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:52,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:13:52,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:52, output treesize:22 [2021-06-05 06:13:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:52,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170040076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:52,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:52,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 06:13:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542740354] [2021-06-05 06:13:52,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:13:52,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:13:52,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:13:52,349 INFO L87 Difference]: Start difference. First operand 629 states and 1516 transitions. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:53,048 INFO L93 Difference]: Finished difference Result 619 states and 1454 transitions. [2021-06-05 06:13:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:13:53,049 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:13:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:53,050 INFO L225 Difference]: With dead ends: 619 [2021-06-05 06:13:53,050 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 06:13:53,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 758.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:13:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 06:13:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 584. [2021-06-05 06:13:53,059 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) [2021-06-05 06:13:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1389 transitions. [2021-06-05 06:13:53,060 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1389 transitions. Word has length 57 [2021-06-05 06:13:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:53,060 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1389 transitions. [2021-06-05 06:13:53,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1389 transitions. [2021-06-05 06:13:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 06:13:53,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:53,062 INFO L521 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] [2021-06-05 06:13:53,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 06:13:53,285 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1694652934, now seen corresponding path program 10 times [2021-06-05 06:13:53,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:53,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560193971] [2021-06-05 06:13:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:13:53,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:53,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560193971] [2021-06-05 06:13:53,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560193971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:53,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625017528] [2021-06-05 06:13:53,511 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 [2021-06-05 06:13:53,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:13:53,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:53,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:13:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:53,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:13:53,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:53,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:53,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:53,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 06:13:53,669 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 [2021-06-05 06:13:53,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:53,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:53,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:53,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:13:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:13:53,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625017528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:53,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:53,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2021-06-05 06:13:53,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807635419] [2021-06-05 06:13:53,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:13:53,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:53,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:13:53,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:13:53,718 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) [2021-06-05 06:13:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:54,085 INFO L93 Difference]: Finished difference Result 578 states and 1357 transitions. [2021-06-05 06:13:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:13:54,085 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 [2021-06-05 06:13:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:54,087 INFO L225 Difference]: With dead ends: 578 [2021-06-05 06:13:54,087 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 06:13:54,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:13:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 06:13:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 559. [2021-06-05 06:13:54,095 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) [2021-06-05 06:13:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1310 transitions. [2021-06-05 06:13:54,096 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1310 transitions. Word has length 57 [2021-06-05 06:13:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:54,097 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1310 transitions. [2021-06-05 06:13:54,097 INFO L483 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) [2021-06-05 06:13:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1310 transitions. [2021-06-05 06:13:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 06:13:54,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:54,098 INFO L521 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] [2021-06-05 06:13:54,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:54,317 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:54,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1465250578, now seen corresponding path program 11 times [2021-06-05 06:13:54,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:54,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442221348] [2021-06-05 06:13:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:13:55,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442221348] [2021-06-05 06:13:55,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442221348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216978097] [2021-06-05 06:13:55,052 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 [2021-06-05 06:13:55,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:13:55,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:13:55,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:55,658 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:13:55,658 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 [2021-06-05 06:13:55,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:55,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:55,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:55,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:56 [2021-06-05 06:13:55,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:13:55,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:13:55,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:13:55,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:13:55,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:55,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:55,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:55,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:35 [2021-06-05 06:13:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:13:55,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:13:55,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:13:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:13:55,948 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 [2021-06-05 06:13:55,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:13:55,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:13:55,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:13:55,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:17 [2021-06-05 06:13:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:13:56,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216978097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:56,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:56,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2021-06-05 06:13:56,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956431651] [2021-06-05 06:13:56,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 06:13:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 06:13:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:13:56,116 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) [2021-06-05 06:13:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:58,500 INFO L93 Difference]: Finished difference Result 653 states and 1524 transitions. [2021-06-05 06:13:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:13:58,500 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 [2021-06-05 06:13:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:58,500 INFO L225 Difference]: With dead ends: 653 [2021-06-05 06:13:58,501 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 06:13:58,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 2906.0ms TimeCoverageRelationStatistics Valid=539, Invalid=3751, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:13:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 06:13:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 06:13:58,503 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) [2021-06-05 06:13:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 06:13:58,504 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-06-05 06:13:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:58,504 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 06:13:58,504 INFO L483 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) [2021-06-05 06:13:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 06:13:58,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 06:13:58,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:58,728 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:13:58,730 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:13:58 BasicIcfg [2021-06-05 06:13:58,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:13:58,730 INFO L168 Benchmark]: Toolchain (without parser) took 14216.80 ms. Allocated memory was 343.9 MB in the beginning and 440.4 MB in the end (delta: 96.5 MB). Free memory was 323.5 MB in the beginning and 163.1 MB in the end (delta: 160.4 MB). Peak memory consumption was 260.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:13:58,730 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 343.9 MB. Free memory was 324.8 MB in the beginning and 324.6 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:13:58,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.53 ms. Allocated memory is still 343.9 MB. Free memory was 323.4 MB in the beginning and 321.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:13:58,730 INFO L168 Benchmark]: Boogie Preprocessor took 14.94 ms. Allocated memory is still 343.9 MB. Free memory was 321.9 MB in the beginning and 320.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:13:58,731 INFO L168 Benchmark]: RCFGBuilder took 312.70 ms. Allocated memory is still 343.9 MB. Free memory was 320.8 MB in the beginning and 302.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 06:13:58,731 INFO L168 Benchmark]: TraceAbstraction took 13860.54 ms. Allocated memory was 343.9 MB in the beginning and 440.4 MB in the end (delta: 96.5 MB). Free memory was 302.4 MB in the beginning and 163.1 MB in the end (delta: 139.3 MB). Peak memory consumption was 239.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:13:58,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 343.9 MB. Free memory was 324.8 MB in the beginning and 324.6 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.53 ms. Allocated memory is still 343.9 MB. Free memory was 323.4 MB in the beginning and 321.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.94 ms. Allocated memory is still 343.9 MB. Free memory was 321.9 MB in the beginning and 320.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 312.70 ms. Allocated memory is still 343.9 MB. Free memory was 320.8 MB in the beginning and 302.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 13860.54 ms. Allocated memory was 343.9 MB in the beginning and 440.4 MB in the end (delta: 96.5 MB). Free memory was 302.4 MB in the beginning and 163.1 MB in the end (delta: 139.3 MB). Peak memory consumption was 239.5 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13758.0ms, OverallIterations: 15, TraceHistogramMax: 3, EmptinessCheckTime: 82.5ms, AutomataDifference: 4873.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 77.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 839 SDtfs, 2446 SDslu, 4690 SDs, 0 SdLazy, 2601 SolverSat, 470 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1428.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 669 GetRequests, 452 SyntacticMatches, 6 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 5078.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3953occurred in iteration=9, InterpolantAutomatonStates: 139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 649.1ms AutomataMinimizationTime, 15 MinimizatonAttempts, 1863 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 121.6ms SsaConstructionTime, 486.4ms SatisfiabilityAnalysisTime, 4812.9ms InterpolantComputationTime, 1135 NumberOfCodeBlocks, 1135 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1110 ConstructedInterpolants, 7 QuantifiedInterpolants, 7258 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1280 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 164/407 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...