/usr/bin/java -Xmx8000000000 -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/bench/exp2x9.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:24:27,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:24:27,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:24:27,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:24:27,270 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 [2021-07-09 17:24:27,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:24:27,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:24:27,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:24:27,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:24:27,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:24:27,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:24:27,310 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:24:27,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:24:27,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:24:27,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:24:27,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:24:27,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:24:27,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:24:27,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:24:27,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:24:27,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:24:27,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:24:27,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:24:27,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:24:27,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:24:27,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:24:27,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:24:27,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:24:27,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:24:27,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:24:27,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:24:27,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:24:27,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:24:27,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:24:27,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:24:27,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:24:27,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:24:27,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:24:27,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:24:27,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:24:27,640 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:24:27,641 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:24:27,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl [2021-07-09 17:24:27,642 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl' [2021-07-09 17:24:27,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:24:27,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:24:27,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:24:27,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:24:27,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:24:27,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:24:27,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:24:27,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:24:27,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:24:27,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/1) ... [2021-07-09 17:24:27,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:24:27,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:24:27,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:24:27,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:24:27,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (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 [2021-07-09 17:24:27,803 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:24:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:24:27,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:24:27,804 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:24:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:24:27,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:24:27,804 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:24:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:24:27,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:24:27,805 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:24:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:24:27,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:24:27,805 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 17:24:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 17:24:27,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 17:24:27,806 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:24:28,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:24:28,051 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:24:28,066 INFO L202 PluginConnector]: Adding new model exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:24:28 BoogieIcfgContainer [2021-07-09 17:24:28,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:24:28,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:24:28,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:24:28,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:24:28,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:27" (1/2) ... [2021-07-09 17:24:28,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b246a1e and model type exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:24:28, skipping insertion in model container [2021-07-09 17:24:28,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:24:28" (2/2) ... [2021-07-09 17:24:28,073 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x9.wvr.bpl [2021-07-09 17:24:28,077 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:24:28,078 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:24:28,078 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:24:28,078 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:24:28,184 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 17:24:28,207 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 17:24:28,240 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:24:28,240 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:24:28,240 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:24:28,240 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:24:28,241 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:24:28,241 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:24:28,241 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:24:28,241 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:24:28,274 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 57 transitions, 146 flow [2021-07-09 17:24:28,780 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12225 states, 12224 states have (on average 3.9794666230366493) internal successors, (48645), 12224 states have internal predecessors, (48645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 12225 states, 12224 states have (on average 3.9794666230366493) internal successors, (48645), 12224 states have internal predecessors, (48645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:28,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:28,912 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:28,913 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1599353066, now seen corresponding path program 1 times [2021-07-09 17:24:28,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:28,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902393769] [2021-07-09 17:24:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:29,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902393769] [2021-07-09 17:24:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902393769] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:29,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:29,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:24:29,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190885766] [2021-07-09 17:24:29,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:24:29,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:29,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:24:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:24:29,158 INFO L87 Difference]: Start difference. First operand has 12225 states, 12224 states have (on average 3.9794666230366493) internal successors, (48645), 12224 states have internal predecessors, (48645), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:29,631 INFO L93 Difference]: Finished difference Result 12650 states and 50294 transitions. [2021-07-09 17:24:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:24:29,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:29,885 INFO L225 Difference]: With dead ends: 12650 [2021-07-09 17:24:29,885 INFO L226 Difference]: Without dead ends: 12619 [2021-07-09 17:24:29,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:24:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12619 states. [2021-07-09 17:24:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12619 to 12354. [2021-07-09 17:24:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.977900105237594) internal successors, (49139), 12353 states have internal predecessors, (49139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 49139 transitions. [2021-07-09 17:24:31,329 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 49139 transitions. Word has length 19 [2021-07-09 17:24:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:31,331 INFO L482 AbstractCegarLoop]: Abstraction has 12354 states and 49139 transitions. [2021-07-09 17:24:31,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 49139 transitions. [2021-07-09 17:24:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:24:31,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:31,389 INFO L508 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] [2021-07-09 17:24:31,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:24:31,391 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:31,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1264286213, now seen corresponding path program 1 times [2021-07-09 17:24:31,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:31,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632431491] [2021-07-09 17:24:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:31,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:31,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632431491] [2021-07-09 17:24:31,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632431491] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:31,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:31,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:24:31,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422019084] [2021-07-09 17:24:31,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:24:31,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:24:31,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:31,494 INFO L87 Difference]: Start difference. First operand 12354 states and 49139 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-07-09 17:24:31,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:31,898 INFO L93 Difference]: Finished difference Result 19078 states and 74406 transitions. [2021-07-09 17:24:31,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:31,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 [2021-07-09 17:24:31,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:32,075 INFO L225 Difference]: With dead ends: 19078 [2021-07-09 17:24:32,075 INFO L226 Difference]: Without dead ends: 19078 [2021-07-09 17:24:32,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19078 states. [2021-07-09 17:24:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19078 to 13678. [2021-07-09 17:24:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13678 states, 13677 states have (on average 3.9960517657381005) internal successors, (54654), 13677 states have internal predecessors, (54654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13678 states to 13678 states and 54654 transitions. [2021-07-09 17:24:33,080 INFO L78 Accepts]: Start accepts. Automaton has 13678 states and 54654 transitions. Word has length 27 [2021-07-09 17:24:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:33,080 INFO L482 AbstractCegarLoop]: Abstraction has 13678 states and 54654 transitions. [2021-07-09 17:24:33,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-07-09 17:24:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 13678 states and 54654 transitions. [2021-07-09 17:24:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:24:33,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:33,289 INFO L508 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] [2021-07-09 17:24:33,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:24:33,289 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1793342173, now seen corresponding path program 1 times [2021-07-09 17:24:33,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:33,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910255129] [2021-07-09 17:24:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:33,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:33,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910255129] [2021-07-09 17:24:33,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910255129] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:33,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:33,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:24:33,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322177534] [2021-07-09 17:24:33,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:33,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:33,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:33,340 INFO L87 Difference]: Start difference. First operand 13678 states and 54654 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:33,665 INFO L93 Difference]: Finished difference Result 19792 states and 77741 transitions. [2021-07-09 17:24:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-07-09 17:24:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:33,777 INFO L225 Difference]: With dead ends: 19792 [2021-07-09 17:24:33,778 INFO L226 Difference]: Without dead ends: 19792 [2021-07-09 17:24:33,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19792 states. [2021-07-09 17:24:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19792 to 15127. [2021-07-09 17:24:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15127 states, 15126 states have (on average 4.021750628057649) internal successors, (60833), 15126 states have internal predecessors, (60833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15127 states to 15127 states and 60833 transitions. [2021-07-09 17:24:34,924 INFO L78 Accepts]: Start accepts. Automaton has 15127 states and 60833 transitions. Word has length 27 [2021-07-09 17:24:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:34,924 INFO L482 AbstractCegarLoop]: Abstraction has 15127 states and 60833 transitions. [2021-07-09 17:24:34,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 15127 states and 60833 transitions. [2021-07-09 17:24:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:24:34,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:34,988 INFO L508 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] [2021-07-09 17:24:34,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:24:34,988 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1511295755, now seen corresponding path program 1 times [2021-07-09 17:24:34,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:34,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323135566] [2021-07-09 17:24:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:35,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:35,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323135566] [2021-07-09 17:24:35,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323135566] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:35,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:35,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:24:35,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983037528] [2021-07-09 17:24:35,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:35,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:35,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:35,029 INFO L87 Difference]: Start difference. First operand 15127 states and 60833 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:35,214 INFO L93 Difference]: Finished difference Result 16794 states and 66463 transitions. [2021-07-09 17:24:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:24:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-07-09 17:24:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:35,313 INFO L225 Difference]: With dead ends: 16794 [2021-07-09 17:24:35,313 INFO L226 Difference]: Without dead ends: 16774 [2021-07-09 17:24:35,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16774 states. [2021-07-09 17:24:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16774 to 15695. [2021-07-09 17:24:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15695 states, 15694 states have (on average 4.002867337836116) internal successors, (62821), 15694 states have internal predecessors, (62821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15695 states to 15695 states and 62821 transitions. [2021-07-09 17:24:36,379 INFO L78 Accepts]: Start accepts. Automaton has 15695 states and 62821 transitions. Word has length 27 [2021-07-09 17:24:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:36,379 INFO L482 AbstractCegarLoop]: Abstraction has 15695 states and 62821 transitions. [2021-07-09 17:24:36,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 15695 states and 62821 transitions. [2021-07-09 17:24:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:24:36,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:36,430 INFO L508 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] [2021-07-09 17:24:36,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:24:36,431 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1008115665, now seen corresponding path program 1 times [2021-07-09 17:24:36,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:36,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086479629] [2021-07-09 17:24:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:36,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:36,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086479629] [2021-07-09 17:24:36,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086479629] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:36,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:36,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:24:36,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858522578] [2021-07-09 17:24:36,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:36,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:36,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:36,478 INFO L87 Difference]: Start difference. First operand 15695 states and 62821 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:36,718 INFO L93 Difference]: Finished difference Result 17936 states and 70972 transitions. [2021-07-09 17:24:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-07-09 17:24:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:37,040 INFO L225 Difference]: With dead ends: 17936 [2021-07-09 17:24:37,041 INFO L226 Difference]: Without dead ends: 17912 [2021-07-09 17:24:37,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17912 states. [2021-07-09 17:24:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17912 to 15939. [2021-07-09 17:24:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15939 states, 15938 states have (on average 3.9939139164261515) internal successors, (63655), 15938 states have internal predecessors, (63655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15939 states to 15939 states and 63655 transitions. [2021-07-09 17:24:37,915 INFO L78 Accepts]: Start accepts. Automaton has 15939 states and 63655 transitions. Word has length 27 [2021-07-09 17:24:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:37,916 INFO L482 AbstractCegarLoop]: Abstraction has 15939 states and 63655 transitions. [2021-07-09 17:24:37,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 15939 states and 63655 transitions. [2021-07-09 17:24:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:24:37,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:37,958 INFO L508 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] [2021-07-09 17:24:37,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:24:37,959 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:37,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1792363413, now seen corresponding path program 2 times [2021-07-09 17:24:37,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:37,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023693140] [2021-07-09 17:24:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:37,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:37,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023693140] [2021-07-09 17:24:37,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023693140] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:37,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:37,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:24:37,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281294242] [2021-07-09 17:24:37,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:37,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:37,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:37,995 INFO L87 Difference]: Start difference. First operand 15939 states and 63655 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:38,231 INFO L93 Difference]: Finished difference Result 18937 states and 75002 transitions. [2021-07-09 17:24:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:38,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-07-09 17:24:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:38,497 INFO L225 Difference]: With dead ends: 18937 [2021-07-09 17:24:38,498 INFO L226 Difference]: Without dead ends: 18937 [2021-07-09 17:24:38,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18937 states. [2021-07-09 17:24:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18937 to 17401. [2021-07-09 17:24:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17401 states, 17400 states have (on average 3.990229885057471) internal successors, (69430), 17400 states have internal predecessors, (69430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17401 states to 17401 states and 69430 transitions. [2021-07-09 17:24:39,335 INFO L78 Accepts]: Start accepts. Automaton has 17401 states and 69430 transitions. Word has length 27 [2021-07-09 17:24:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:39,335 INFO L482 AbstractCegarLoop]: Abstraction has 17401 states and 69430 transitions. [2021-07-09 17:24:39,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 17401 states and 69430 transitions. [2021-07-09 17:24:39,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:24:39,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:39,376 INFO L508 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] [2021-07-09 17:24:39,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:24:39,377 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1884508183, now seen corresponding path program 2 times [2021-07-09 17:24:39,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:39,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928333968] [2021-07-09 17:24:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928333968] [2021-07-09 17:24:39,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928333968] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:39,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:39,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:24:39,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704724148] [2021-07-09 17:24:39,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:39,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:39,404 INFO L87 Difference]: Start difference. First operand 17401 states and 69430 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:39,593 INFO L93 Difference]: Finished difference Result 18936 states and 74728 transitions. [2021-07-09 17:24:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:39,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-07-09 17:24:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:39,665 INFO L225 Difference]: With dead ends: 18936 [2021-07-09 17:24:39,665 INFO L226 Difference]: Without dead ends: 18895 [2021-07-09 17:24:39,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18895 states. [2021-07-09 17:24:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18895 to 17646. [2021-07-09 17:24:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17646 states, 17645 states have (on average 3.9815245111929727) internal successors, (70254), 17645 states have internal predecessors, (70254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17646 states to 17646 states and 70254 transitions. [2021-07-09 17:24:40,723 INFO L78 Accepts]: Start accepts. Automaton has 17646 states and 70254 transitions. Word has length 27 [2021-07-09 17:24:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:40,723 INFO L482 AbstractCegarLoop]: Abstraction has 17646 states and 70254 transitions. [2021-07-09 17:24:40,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-07-09 17:24:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 17646 states and 70254 transitions. [2021-07-09 17:24:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:24:40,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:40,764 INFO L508 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] [2021-07-09 17:24:40,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:24:40,764 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:40,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:40,765 INFO L82 PathProgramCache]: Analyzing trace with hash -19520629, now seen corresponding path program 2 times [2021-07-09 17:24:40,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:40,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130111496] [2021-07-09 17:24:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:40,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:40,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130111496] [2021-07-09 17:24:40,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130111496] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:40,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:40,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:24:40,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129015058] [2021-07-09 17:24:40,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:24:40,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:24:40,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:40,815 INFO L87 Difference]: Start difference. First operand 17646 states and 70254 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-07-09 17:24:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:41,067 INFO L93 Difference]: Finished difference Result 20333 states and 80199 transitions. [2021-07-09 17:24:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:41,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 [2021-07-09 17:24:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:41,153 INFO L225 Difference]: With dead ends: 20333 [2021-07-09 17:24:41,154 INFO L226 Difference]: Without dead ends: 20333 [2021-07-09 17:24:41,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20333 states. [2021-07-09 17:24:42,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20333 to 19021. [2021-07-09 17:24:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19021 states, 19020 states have (on average 3.982492113564669) internal successors, (75747), 19020 states have internal predecessors, (75747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19021 states to 19021 states and 75747 transitions. [2021-07-09 17:24:42,170 INFO L78 Accepts]: Start accepts. Automaton has 19021 states and 75747 transitions. Word has length 27 [2021-07-09 17:24:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:42,171 INFO L482 AbstractCegarLoop]: Abstraction has 19021 states and 75747 transitions. [2021-07-09 17:24:42,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-07-09 17:24:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 19021 states and 75747 transitions. [2021-07-09 17:24:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:24:42,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:42,224 INFO L508 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] [2021-07-09 17:24:42,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:24:42,224 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:42,225 INFO L82 PathProgramCache]: Analyzing trace with hash -273462802, now seen corresponding path program 1 times [2021-07-09 17:24:42,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:42,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41568596] [2021-07-09 17:24:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:42,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:42,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41568596] [2021-07-09 17:24:42,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41568596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187702353] [2021-07-09 17:24:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:24:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:43,773 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-07-09 17:24:43,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-07-09 17:24:43,998 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_x1_10_133 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:597) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-07-09 17:24:44,002 INFO L168 Benchmark]: Toolchain (without parser) took 16311.34 ms. Allocated memory was 255.9 MB in the beginning and 6.4 GB in the end (delta: 6.1 GB). Free memory was 234.8 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 384.4 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:44,002 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 235.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:24:44,003 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.59 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:44,003 INFO L168 Benchmark]: Boogie Preprocessor took 13.52 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 232.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:44,003 INFO L168 Benchmark]: RCFGBuilder took 326.85 ms. Allocated memory is still 255.9 MB. Free memory was 232.1 MB in the beginning and 218.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:44,003 INFO L168 Benchmark]: TraceAbstraction took 15933.46 ms. Allocated memory was 255.9 MB in the beginning and 6.4 GB in the end (delta: 6.1 GB). Free memory was 217.7 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 366.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:44,005 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 235.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 32.59 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.52 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 232.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 326.85 ms. Allocated memory is still 255.9 MB. Free memory was 232.1 MB in the beginning and 218.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15933.46 ms. Allocated memory was 255.9 MB in the beginning and 6.4 GB in the end (delta: 6.1 GB). Free memory was 217.7 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 366.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_x1_10_133 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_x1_10_133 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...