/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/parallel/misc-3-extended.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:46:53,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:46:53,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:46:53,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:46:53,978 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 17:46:54,051 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:46:54,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:46:54,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:46:54,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:46:54,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:46:54,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:46:54,053 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:46:54,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:46:54,053 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:46:54,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:46:54,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:46:54,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:46:54,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:46:54,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:46:54,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:46:54,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:46:54,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:46:54,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:46:54,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:46:54,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:46:54,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:46:54,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:46:54,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:46:54,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:46:54,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:46:54,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:46:54,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:46:54,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:46:54,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:46:54,056 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:46:54,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:46:54,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:46:54,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:46:54,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:46:54,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:46:54,383 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:46:54,385 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:46:54,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl [2021-07-09 17:46:54,386 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl' [2021-07-09 17:46:54,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:46:54,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:46:54,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:46:54,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:46:54,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:46:54,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:46:54,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:46:54,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:46:54,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:46:54,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/1) ... [2021-07-09 17:46:54,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:46:54,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:46:54,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:46:54,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:46:54,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (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 17:46:54,559 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:46:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:46:54,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:46:54,560 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:46:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:46:54,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:46:54,560 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:46:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:46:54,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:46:54,561 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:46:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:46:54,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:46:54,562 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 17:46:54,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:46:54,719 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:46:54,720 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:46:54 BoogieIcfgContainer [2021-07-09 17:46:54,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:46:54,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:46:54,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:46:54,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:46:54,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:54" (1/2) ... [2021-07-09 17:46:54,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a12f5a and model type misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:46:54, skipping insertion in model container [2021-07-09 17:46:54,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:46:54" (2/2) ... [2021-07-09 17:46:54,727 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3-extended.wvr.bpl [2021-07-09 17:46:54,731 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:46:54,732 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:46:54,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:46:54,732 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:46:54,765 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:46:54,784 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:46:54,800 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:46:54,800 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:46:54,800 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:46:54,801 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:46:54,801 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:46:54,801 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:46:54,801 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:46:54,801 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:46:54,826 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 50 transitions, 124 flow [2021-07-09 17:46:54,970 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 914 states, 913 states have (on average 3.895947426067908) internal successors, (3557), 913 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 914 states, 913 states have (on average 3.895947426067908) internal successors, (3557), 913 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:46:54,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,000 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:55,001 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,010 INFO L82 PathProgramCache]: Analyzing trace with hash -932509886, now seen corresponding path program 1 times [2021-07-09 17:46:55,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360555850] [2021-07-09 17:46:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:55,155 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 17:46:55,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:55,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360555850] [2021-07-09 17:46:55,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360555850] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:55,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:55,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:46:55,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30125709] [2021-07-09 17:46:55,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:46:55,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:46:55,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:55,183 INFO L87 Difference]: Start difference. First operand has 914 states, 913 states have (on average 3.895947426067908) internal successors, (3557), 913 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:55,248 INFO L93 Difference]: Finished difference Result 1005 states and 3886 transitions. [2021-07-09 17:46:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:46:55,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:46:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:55,283 INFO L225 Difference]: With dead ends: 1005 [2021-07-09 17:46:55,283 INFO L226 Difference]: Without dead ends: 1005 [2021-07-09 17:46:55,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-07-09 17:46:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2021-07-09 17:46:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.8705179282868527) internal successors, (3886), 1004 states have internal predecessors, (3886), 0 states have call successors, (0), 0 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 17:46:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3886 transitions. [2021-07-09 17:46:55,412 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3886 transitions. Word has length 15 [2021-07-09 17:46:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:55,413 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3886 transitions. [2021-07-09 17:46:55,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3886 transitions. [2021-07-09 17:46:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:46:55,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,422 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] [2021-07-09 17:46:55,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:46:55,424 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,428 INFO L82 PathProgramCache]: Analyzing trace with hash -406691327, now seen corresponding path program 1 times [2021-07-09 17:46:55,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115887588] [2021-07-09 17:46:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:55,472 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 17:46:55,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:55,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115887588] [2021-07-09 17:46:55,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115887588] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:55,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:55,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:46:55,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529067618] [2021-07-09 17:46:55,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:46:55,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:55,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:46:55,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:55,477 INFO L87 Difference]: Start difference. First operand 1005 states and 3886 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 17:46:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:55,500 INFO L93 Difference]: Finished difference Result 1114 states and 4276 transitions. [2021-07-09 17:46:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:46:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:46:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:55,509 INFO L225 Difference]: With dead ends: 1114 [2021-07-09 17:46:55,509 INFO L226 Difference]: Without dead ends: 1114 [2021-07-09 17:46:55,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-07-09 17:46:55,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-07-09 17:46:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.8418688230008984) internal successors, (4276), 1113 states have internal predecessors, (4276), 0 states have call successors, (0), 0 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 17:46:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4276 transitions. [2021-07-09 17:46:55,584 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4276 transitions. Word has length 21 [2021-07-09 17:46:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:55,584 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4276 transitions. [2021-07-09 17:46:55,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 17:46:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4276 transitions. [2021-07-09 17:46:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:46:55,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,589 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 17:46:55,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:46:55,590 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2065937446, now seen corresponding path program 1 times [2021-07-09 17:46:55,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659235063] [2021-07-09 17:46:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:55,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:55,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659235063] [2021-07-09 17:46:55,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659235063] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:55,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:55,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:46:55,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2318763] [2021-07-09 17:46:55,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:55,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:55,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:55,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:55,630 INFO L87 Difference]: Start difference. First operand 1114 states and 4276 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 17:46:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:55,680 INFO L93 Difference]: Finished difference Result 1550 states and 5618 transitions. [2021-07-09 17:46:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:46:55,681 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 17:46:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:55,694 INFO L225 Difference]: With dead ends: 1550 [2021-07-09 17:46:55,697 INFO L226 Difference]: Without dead ends: 1550 [2021-07-09 17:46:55,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-07-09 17:46:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1550. [2021-07-09 17:46:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.6268560361523563) internal successors, (5618), 1549 states have internal predecessors, (5618), 0 states have call successors, (0), 0 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 17:46:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5618 transitions. [2021-07-09 17:46:55,754 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5618 transitions. Word has length 27 [2021-07-09 17:46:55,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:55,754 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5618 transitions. [2021-07-09 17:46:55,754 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 17:46:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5618 transitions. [2021-07-09 17:46:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:46:55,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,762 INFO L508 BasicCegarLoop]: trace histogram [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] [2021-07-09 17:46:55,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:46:55,762 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,763 INFO L82 PathProgramCache]: Analyzing trace with hash -114728766, now seen corresponding path program 1 times [2021-07-09 17:46:55,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365313553] [2021-07-09 17:46:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:46:55,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:55,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365313553] [2021-07-09 17:46:55,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365313553] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:55,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:55,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:46:55,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735256832] [2021-07-09 17:46:55,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:46:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:46:55,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:55,843 INFO L87 Difference]: Start difference. First operand 1550 states and 5618 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 17:46:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:55,873 INFO L93 Difference]: Finished difference Result 1705 states and 6135 transitions. [2021-07-09 17:46:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:46:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:46:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:55,885 INFO L225 Difference]: With dead ends: 1705 [2021-07-09 17:46:55,885 INFO L226 Difference]: Without dead ends: 1705 [2021-07-09 17:46:55,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:55,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-07-09 17:46:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1705. [2021-07-09 17:46:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.6003521126760565) internal successors, (6135), 1704 states have internal predecessors, (6135), 0 states have call successors, (0), 0 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 17:46:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6135 transitions. [2021-07-09 17:46:55,961 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6135 transitions. Word has length 32 [2021-07-09 17:46:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:55,965 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 6135 transitions. [2021-07-09 17:46:55,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 17:46:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6135 transitions. [2021-07-09 17:46:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:46:55,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,973 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-07-09 17:46:55,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:46:55,973 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1356073541, now seen corresponding path program 1 times [2021-07-09 17:46:55,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168002827] [2021-07-09 17:46:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:46:56,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:56,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168002827] [2021-07-09 17:46:56,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168002827] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:56,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:56,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:46:56,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133079080] [2021-07-09 17:46:56,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:46:56,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:56,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:46:56,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:56,014 INFO L87 Difference]: Start difference. First operand 1705 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:56,041 INFO L93 Difference]: Finished difference Result 2170 states and 7686 transitions. [2021-07-09 17:46:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:46:56,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:46:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:56,056 INFO L225 Difference]: With dead ends: 2170 [2021-07-09 17:46:56,056 INFO L226 Difference]: Without dead ends: 2170 [2021-07-09 17:46:56,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-07-09 17:46:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2015. [2021-07-09 17:46:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5595829195630584) internal successors, (7169), 2014 states have internal predecessors, (7169), 0 states have call successors, (0), 0 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 17:46:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7169 transitions. [2021-07-09 17:46:56,152 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7169 transitions. Word has length 38 [2021-07-09 17:46:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:56,153 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7169 transitions. [2021-07-09 17:46:56,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7169 transitions. [2021-07-09 17:46:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:46:56,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:56,163 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-07-09 17:46:56,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:46:56,163 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash 230141437, now seen corresponding path program 1 times [2021-07-09 17:46:56,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:56,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199395378] [2021-07-09 17:46:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:46:56,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199395378] [2021-07-09 17:46:56,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199395378] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:56,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:56,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:46:56,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634525604] [2021-07-09 17:46:56,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:56,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:56,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:56,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:56,216 INFO L87 Difference]: Start difference. First operand 2015 states and 7169 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:56,260 INFO L93 Difference]: Finished difference Result 2747 states and 9215 transitions. [2021-07-09 17:46:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:46:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:46:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:56,277 INFO L225 Difference]: With dead ends: 2747 [2021-07-09 17:46:56,278 INFO L226 Difference]: Without dead ends: 2747 [2021-07-09 17:46:56,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-07-09 17:46:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2021-07-09 17:46:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2746 states have (on average 3.3557902403495996) internal successors, (9215), 2746 states have internal predecessors, (9215), 0 states have call successors, (0), 0 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 17:46:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 9215 transitions. [2021-07-09 17:46:56,378 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 9215 transitions. Word has length 38 [2021-07-09 17:46:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:56,382 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 9215 transitions. [2021-07-09 17:46:56,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 9215 transitions. [2021-07-09 17:46:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 17:46:56,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:56,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:56,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:46:56,390 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1975032455, now seen corresponding path program 1 times [2021-07-09 17:46:56,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:56,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645293571] [2021-07-09 17:46:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 17:46:56,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:56,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645293571] [2021-07-09 17:46:56,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645293571] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:56,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:56,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:46:56,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129875595] [2021-07-09 17:46:56,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:56,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:56,444 INFO L87 Difference]: Start difference. First operand 2747 states and 9215 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:56,500 INFO L93 Difference]: Finished difference Result 3169 states and 10115 transitions. [2021-07-09 17:46:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:46:56,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 17:46:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:56,518 INFO L225 Difference]: With dead ends: 3169 [2021-07-09 17:46:56,518 INFO L226 Difference]: Without dead ends: 3169 [2021-07-09 17:46:56,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-07-09 17:46:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 3169. [2021-07-09 17:46:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 3.1928661616161618) internal successors, (10115), 3168 states have internal predecessors, (10115), 0 states have call successors, (0), 0 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 17:46:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 10115 transitions. [2021-07-09 17:46:56,612 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 10115 transitions. Word has length 43 [2021-07-09 17:46:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:56,613 INFO L482 AbstractCegarLoop]: Abstraction has 3169 states and 10115 transitions. [2021-07-09 17:46:56,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 10115 transitions. [2021-07-09 17:46:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:46:56,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:56,623 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:56,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:46:56,624 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:56,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2101533879, now seen corresponding path program 1 times [2021-07-09 17:46:56,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:56,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286544671] [2021-07-09 17:46:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:56,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:56,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286544671] [2021-07-09 17:46:56,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286544671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904480259] [2021-07-09 17:46:56,765 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 17:46:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:46:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:57,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904480259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:57,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:57,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:46:57,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241434638] [2021-07-09 17:46:57,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:46:57,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:46:57,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:57,173 INFO L87 Difference]: Start difference. First operand 3169 states and 10115 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:57,250 INFO L93 Difference]: Finished difference Result 5225 states and 16762 transitions. [2021-07-09 17:46:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:46:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:46:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:57,291 INFO L225 Difference]: With dead ends: 5225 [2021-07-09 17:46:57,291 INFO L226 Difference]: Without dead ends: 5074 [2021-07-09 17:46:57,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5074 states. [2021-07-09 17:46:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5074 to 4826. [2021-07-09 17:46:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 3.2426943005181346) internal successors, (15646), 4825 states have internal predecessors, (15646), 0 states have call successors, (0), 0 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 17:46:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 15646 transitions. [2021-07-09 17:46:57,474 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 15646 transitions. Word has length 48 [2021-07-09 17:46:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:57,476 INFO L482 AbstractCegarLoop]: Abstraction has 4826 states and 15646 transitions. [2021-07-09 17:46:57,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 15646 transitions. [2021-07-09 17:46:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:46:57,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:57,491 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:57,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-07-09 17:46:57,716 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash 393793463, now seen corresponding path program 2 times [2021-07-09 17:46:57,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:57,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670880082] [2021-07-09 17:46:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:57,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:57,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670880082] [2021-07-09 17:46:57,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670880082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936169136] [2021-07-09 17:46:57,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:57,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:57,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:57,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:46:57,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:57,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936169136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:57,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:57,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:46:57,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441892957] [2021-07-09 17:46:57,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:46:57,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:46:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:57,986 INFO L87 Difference]: Start difference. First operand 4826 states and 15646 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:58,070 INFO L93 Difference]: Finished difference Result 6962 states and 22532 transitions. [2021-07-09 17:46:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:46:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:46:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:58,095 INFO L225 Difference]: With dead ends: 6962 [2021-07-09 17:46:58,095 INFO L226 Difference]: Without dead ends: 6313 [2021-07-09 17:46:58,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-07-09 17:46:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 4631. [2021-07-09 17:46:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 3.2323974082073432) internal successors, (14966), 4630 states have internal predecessors, (14966), 0 states have call successors, (0), 0 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 17:46:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 14966 transitions. [2021-07-09 17:46:58,291 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 14966 transitions. Word has length 48 [2021-07-09 17:46:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:58,291 INFO L482 AbstractCegarLoop]: Abstraction has 4631 states and 14966 transitions. [2021-07-09 17:46:58,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 14966 transitions. [2021-07-09 17:46:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:46:58,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:58,303 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:58,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:58,528 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1349775333, now seen corresponding path program 3 times [2021-07-09 17:46:58,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:58,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918112605] [2021-07-09 17:46:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:58,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918112605] [2021-07-09 17:46:58,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918112605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843304972] [2021-07-09 17:46:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:58,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:46:58,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:46:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:58,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843304972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:58,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:58,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:46:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538539890] [2021-07-09 17:46:58,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:46:58,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:58,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:46:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:58,785 INFO L87 Difference]: Start difference. First operand 4631 states and 14966 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:58,882 INFO L93 Difference]: Finished difference Result 8195 states and 26626 transitions. [2021-07-09 17:46:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:46:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:46:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:58,914 INFO L225 Difference]: With dead ends: 8195 [2021-07-09 17:46:58,914 INFO L226 Difference]: Without dead ends: 7472 [2021-07-09 17:46:58,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2021-07-09 17:46:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 6998. [2021-07-09 17:46:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 6997 states have (on average 3.2722595398027727) internal successors, (22896), 6997 states have internal predecessors, (22896), 0 states have call successors, (0), 0 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 17:46:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 22896 transitions. [2021-07-09 17:46:59,154 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 22896 transitions. Word has length 48 [2021-07-09 17:46:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:59,154 INFO L482 AbstractCegarLoop]: Abstraction has 6998 states and 22896 transitions. [2021-07-09 17:46:59,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 22896 transitions. [2021-07-09 17:46:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:46:59,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:59,169 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:59,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:46:59,385 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash -647503601, now seen corresponding path program 4 times [2021-07-09 17:46:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:59,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605399992] [2021-07-09 17:46:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:59,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:59,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605399992] [2021-07-09 17:46:59,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605399992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:59,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608092849] [2021-07-09 17:46:59,491 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 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 [2021-07-09 17:46:59,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:46:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:59,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608092849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:59,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:59,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:46:59,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612261492] [2021-07-09 17:46:59,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:46:59,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:59,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:46:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:46:59,624 INFO L87 Difference]: Start difference. First operand 6998 states and 22896 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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) [2021-07-09 17:46:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:59,744 INFO L93 Difference]: Finished difference Result 9603 states and 31287 transitions. [2021-07-09 17:46:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:46:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 48 [2021-07-09 17:46:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:59,773 INFO L225 Difference]: With dead ends: 9603 [2021-07-09 17:46:59,773 INFO L226 Difference]: Without dead ends: 8352 [2021-07-09 17:46:59,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:46:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-07-09 17:46:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6644. [2021-07-09 17:46:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6644 states, 6643 states have (on average 3.2599729038085203) internal successors, (21656), 6643 states have internal predecessors, (21656), 0 states have call successors, (0), 0 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 17:47:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 21656 transitions. [2021-07-09 17:47:00,014 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 21656 transitions. Word has length 48 [2021-07-09 17:47:00,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:00,014 INFO L482 AbstractCegarLoop]: Abstraction has 6644 states and 21656 transitions. [2021-07-09 17:47:00,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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) [2021-07-09 17:47:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 21656 transitions. [2021-07-09 17:47:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:47:00,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:00,030 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:00,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:00,253 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash 341910175, now seen corresponding path program 5 times [2021-07-09 17:47:00,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:00,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875534382] [2021-07-09 17:47:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:47:00,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:00,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875534382] [2021-07-09 17:47:00,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875534382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:00,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19659843] [2021-07-09 17:47:00,374 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 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 [2021-07-09 17:47:00,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:47:00,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:00,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:47:00,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19659843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:00,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:00,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:00,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265631464] [2021-07-09 17:47:00,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:00,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:00,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:00,530 INFO L87 Difference]: Start difference. First operand 6644 states and 21656 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:00,637 INFO L93 Difference]: Finished difference Result 8899 states and 28902 transitions. [2021-07-09 17:47:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:47:00,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:47:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:00,667 INFO L225 Difference]: With dead ends: 8899 [2021-07-09 17:47:00,667 INFO L226 Difference]: Without dead ends: 8464 [2021-07-09 17:47:00,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2021-07-09 17:47:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 6769. [2021-07-09 17:47:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 3.255171394799054) internal successors, (22031), 6768 states have internal predecessors, (22031), 0 states have call successors, (0), 0 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 17:47:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 22031 transitions. [2021-07-09 17:47:00,903 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 22031 transitions. Word has length 48 [2021-07-09 17:47:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:00,904 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 22031 transitions. [2021-07-09 17:47:00,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 22031 transitions. [2021-07-09 17:47:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:47:00,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:00,920 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:01,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 17:47:01,143 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:01,143 INFO L82 PathProgramCache]: Analyzing trace with hash -147156187, now seen corresponding path program 6 times [2021-07-09 17:47:01,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:01,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630648600] [2021-07-09 17:47:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:47:01,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630648600] [2021-07-09 17:47:01,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630648600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:01,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184422261] [2021-07-09 17:47:01,202 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 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 [2021-07-09 17:47:01,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:01,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:47:01,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184422261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:01,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:01,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:01,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436710389] [2021-07-09 17:47:01,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:01,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:01,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:01,344 INFO L87 Difference]: Start difference. First operand 6769 states and 22031 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:01,458 INFO L93 Difference]: Finished difference Result 11547 states and 37607 transitions. [2021-07-09 17:47:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:47:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:47:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:01,496 INFO L225 Difference]: With dead ends: 11547 [2021-07-09 17:47:01,497 INFO L226 Difference]: Without dead ends: 11400 [2021-07-09 17:47:01,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11400 states. [2021-07-09 17:47:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11400 to 10354. [2021-07-09 17:47:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10354 states, 10353 states have (on average 3.3118902733507194) internal successors, (34288), 10353 states have internal predecessors, (34288), 0 states have call successors, (0), 0 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 17:47:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 34288 transitions. [2021-07-09 17:47:01,827 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 34288 transitions. Word has length 48 [2021-07-09 17:47:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:01,827 INFO L482 AbstractCegarLoop]: Abstraction has 10354 states and 34288 transitions. [2021-07-09 17:47:01,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 34288 transitions. [2021-07-09 17:47:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:47:01,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:01,853 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:02,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:02,075 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:02,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:02,076 INFO L82 PathProgramCache]: Analyzing trace with hash -736589671, now seen corresponding path program 7 times [2021-07-09 17:47:02,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:02,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132519619] [2021-07-09 17:47:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:02,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:02,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132519619] [2021-07-09 17:47:02,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132519619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:02,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354507709] [2021-07-09 17:47:02,176 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 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 [2021-07-09 17:47:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:02,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354507709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:02,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:02,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:02,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623210837] [2021-07-09 17:47:02,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:02,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:02,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:02,332 INFO L87 Difference]: Start difference. First operand 10354 states and 34288 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:02,492 INFO L93 Difference]: Finished difference Result 13296 states and 43632 transitions. [2021-07-09 17:47:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:47:02,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:47:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:02,530 INFO L225 Difference]: With dead ends: 13296 [2021-07-09 17:47:02,530 INFO L226 Difference]: Without dead ends: 11854 [2021-07-09 17:47:02,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2021-07-09 17:47:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 7019. [2021-07-09 17:47:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7019 states, 7018 states have (on average 3.2460815047021945) internal successors, (22781), 7018 states have internal predecessors, (22781), 0 states have call successors, (0), 0 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 17:47:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7019 states to 7019 states and 22781 transitions. [2021-07-09 17:47:02,838 INFO L78 Accepts]: Start accepts. Automaton has 7019 states and 22781 transitions. Word has length 48 [2021-07-09 17:47:02,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:02,838 INFO L482 AbstractCegarLoop]: Abstraction has 7019 states and 22781 transitions. [2021-07-09 17:47:02,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 7019 states and 22781 transitions. [2021-07-09 17:47:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:47:02,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:02,855 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:03,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:47:03,079 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -399003945, now seen corresponding path program 8 times [2021-07-09 17:47:03,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:03,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496693113] [2021-07-09 17:47:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:03,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:03,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496693113] [2021-07-09 17:47:03,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496693113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:03,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534527788] [2021-07-09 17:47:03,155 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 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 [2021-07-09 17:47:03,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:03,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:03,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:03,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:03,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534527788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:03,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:03,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:03,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268658541] [2021-07-09 17:47:03,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:03,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:03,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:03,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:03,308 INFO L87 Difference]: Start difference. First operand 7019 states and 22781 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:03,439 INFO L93 Difference]: Finished difference Result 10813 states and 35013 transitions. [2021-07-09 17:47:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:47:03,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:47:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:03,466 INFO L225 Difference]: With dead ends: 10813 [2021-07-09 17:47:03,466 INFO L226 Difference]: Without dead ends: 10186 [2021-07-09 17:47:03,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-07-09 17:47:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 7527. [2021-07-09 17:47:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 7526 states have (on average 3.233723093276641) internal successors, (24337), 7526 states have internal predecessors, (24337), 0 states have call successors, (0), 0 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 17:47:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 24337 transitions. [2021-07-09 17:47:03,716 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 24337 transitions. Word has length 48 [2021-07-09 17:47:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:03,716 INFO L482 AbstractCegarLoop]: Abstraction has 7527 states and 24337 transitions. [2021-07-09 17:47:03,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 24337 transitions. [2021-07-09 17:47:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:47:03,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:03,730 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:03,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:47:03,945 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:03,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:03,945 INFO L82 PathProgramCache]: Analyzing trace with hash -988437429, now seen corresponding path program 9 times [2021-07-09 17:47:03,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:03,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79287572] [2021-07-09 17:47:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:04,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:04,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79287572] [2021-07-09 17:47:04,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79287572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:04,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320184980] [2021-07-09 17:47:04,011 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 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 [2021-07-09 17:47:04,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:47:04,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:04,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320184980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:04,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:04,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:04,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797161864] [2021-07-09 17:47:04,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:04,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:04,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:04,133 INFO L87 Difference]: Start difference. First operand 7527 states and 24337 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:04,264 INFO L93 Difference]: Finished difference Result 12429 states and 40214 transitions. [2021-07-09 17:47:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:47:04,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:47:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:04,298 INFO L225 Difference]: With dead ends: 12429 [2021-07-09 17:47:04,298 INFO L226 Difference]: Without dead ends: 12276 [2021-07-09 17:47:04,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2021-07-09 17:47:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 12112. [2021-07-09 17:47:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12112 states, 12111 states have (on average 3.2449838989348527) internal successors, (39300), 12111 states have internal predecessors, (39300), 0 states have call successors, (0), 0 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 17:47:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12112 states to 12112 states and 39300 transitions. [2021-07-09 17:47:04,605 INFO L78 Accepts]: Start accepts. Automaton has 12112 states and 39300 transitions. Word has length 48 [2021-07-09 17:47:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:04,605 INFO L482 AbstractCegarLoop]: Abstraction has 12112 states and 39300 transitions. [2021-07-09 17:47:04,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 12112 states and 39300 transitions. [2021-07-09 17:47:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:47:04,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:04,724 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:04,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:47:04,925 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:04,926 INFO L82 PathProgramCache]: Analyzing trace with hash -169037225, now seen corresponding path program 10 times [2021-07-09 17:47:04,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:04,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417187846] [2021-07-09 17:47:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:05,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:05,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417187846] [2021-07-09 17:47:05,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417187846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:05,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031114397] [2021-07-09 17:47:05,006 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 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 [2021-07-09 17:47:05,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:05,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:05,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031114397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:05,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:05,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549275180] [2021-07-09 17:47:05,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:05,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:05,120 INFO L87 Difference]: Start difference. First operand 12112 states and 39300 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:05,288 INFO L93 Difference]: Finished difference Result 21741 states and 70711 transitions. [2021-07-09 17:47:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:47:05,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:47:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:05,334 INFO L225 Difference]: With dead ends: 21741 [2021-07-09 17:47:05,334 INFO L226 Difference]: Without dead ends: 19893 [2021-07-09 17:47:05,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19893 states. [2021-07-09 17:47:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19893 to 18976. [2021-07-09 17:47:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18976 states, 18975 states have (on average 3.25965744400527) internal successors, (61852), 18975 states have internal predecessors, (61852), 0 states have call successors, (0), 0 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 17:47:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18976 states to 18976 states and 61852 transitions. [2021-07-09 17:47:05,812 INFO L78 Accepts]: Start accepts. Automaton has 18976 states and 61852 transitions. Word has length 48 [2021-07-09 17:47:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:05,813 INFO L482 AbstractCegarLoop]: Abstraction has 18976 states and 61852 transitions. [2021-07-09 17:47:05,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 18976 states and 61852 transitions. [2021-07-09 17:47:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:47:05,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:05,845 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:06,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:47:06,047 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:06,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1898613067, now seen corresponding path program 11 times [2021-07-09 17:47:06,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:06,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316477741] [2021-07-09 17:47:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:06,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:06,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316477741] [2021-07-09 17:47:06,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316477741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:06,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065559371] [2021-07-09 17:47:06,133 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:06,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:47:06,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:06,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:06,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:06,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065559371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:06,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:06,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:06,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10458289] [2021-07-09 17:47:06,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:06,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:06,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:06,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:06,269 INFO L87 Difference]: Start difference. First operand 18976 states and 61852 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:06,532 INFO L93 Difference]: Finished difference Result 34095 states and 111504 transitions. [2021-07-09 17:47:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:47:06,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:47:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:06,625 INFO L225 Difference]: With dead ends: 34095 [2021-07-09 17:47:06,625 INFO L226 Difference]: Without dead ends: 30605 [2021-07-09 17:47:06,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2021-07-09 17:47:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 29305. [2021-07-09 17:47:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29305 states, 29304 states have (on average 3.2807125307125307) internal successors, (96138), 29304 states have internal predecessors, (96138), 0 states have call successors, (0), 0 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 17:47:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29305 states to 29305 states and 96138 transitions. [2021-07-09 17:47:07,488 INFO L78 Accepts]: Start accepts. Automaton has 29305 states and 96138 transitions. Word has length 48 [2021-07-09 17:47:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:07,489 INFO L482 AbstractCegarLoop]: Abstraction has 29305 states and 96138 transitions. [2021-07-09 17:47:07,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 29305 states and 96138 transitions. [2021-07-09 17:47:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:47:07,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:07,699 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:07,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:47:07,922 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1849079559, now seen corresponding path program 12 times [2021-07-09 17:47:07,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:07,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314793226] [2021-07-09 17:47:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:07,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:07,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314793226] [2021-07-09 17:47:07,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314793226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:07,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454662989] [2021-07-09 17:47:07,997 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:08,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:08,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:08,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:08,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454662989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:08,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:08,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:08,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607564331] [2021-07-09 17:47:08,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:08,127 INFO L87 Difference]: Start difference. First operand 29305 states and 96138 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:08,534 INFO L93 Difference]: Finished difference Result 46568 states and 152448 transitions. [2021-07-09 17:47:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:47:08,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:47:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:08,747 INFO L225 Difference]: With dead ends: 46568 [2021-07-09 17:47:08,747 INFO L226 Difference]: Without dead ends: 44858 [2021-07-09 17:47:08,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44858 states. [2021-07-09 17:47:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44858 to 44258. [2021-07-09 17:47:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44258 states, 44257 states have (on average 3.277741374245882) internal successors, (145063), 44257 states have internal predecessors, (145063), 0 states have call successors, (0), 0 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 17:47:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44258 states to 44258 states and 145063 transitions. [2021-07-09 17:47:09,748 INFO L78 Accepts]: Start accepts. Automaton has 44258 states and 145063 transitions. Word has length 48 [2021-07-09 17:47:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:09,748 INFO L482 AbstractCegarLoop]: Abstraction has 44258 states and 145063 transitions. [2021-07-09 17:47:09,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 44258 states and 145063 transitions. [2021-07-09 17:47:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:47:09,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:09,829 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2021-07-09 17:47:10,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:10,029 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash 294979113, now seen corresponding path program 1 times [2021-07-09 17:47:10,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:10,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327259820] [2021-07-09 17:47:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:47:10,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:10,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327259820] [2021-07-09 17:47:10,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327259820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:10,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747905302] [2021-07-09 17:47:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:10,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:47:10,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:47:10,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747905302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:10,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:10,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:47:10,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927013480] [2021-07-09 17:47:10,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:10,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:10,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:10,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:10,489 INFO L87 Difference]: Start difference. First operand 44258 states and 145063 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 17:47:10,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:10,865 INFO L93 Difference]: Finished difference Result 44256 states and 145061 transitions. [2021-07-09 17:47:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:10,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:47:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:10,865 INFO L225 Difference]: With dead ends: 44256 [2021-07-09 17:47:10,865 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 17:47:10,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 17:47:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 17:47:10,866 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) [2021-07-09 17:47:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 17:47:10,866 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-07-09 17:47:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:10,866 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 17:47:10,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 17:47:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 17:47:10,866 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:47:11,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-07-09 17:47:11,075 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:47:11,076 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:47:11 BasicIcfg [2021-07-09 17:47:11,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:47:11,077 INFO L168 Benchmark]: Toolchain (without parser) took 16649.92 ms. Allocated memory was 127.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 107.6 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 679.5 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:11,077 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:47:11,077 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.83 ms. Allocated memory is still 127.9 MB. Free memory was 107.5 MB in the beginning and 106.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:11,077 INFO L168 Benchmark]: Boogie Preprocessor took 18.20 ms. Allocated memory is still 127.9 MB. Free memory was 106.1 MB in the beginning and 105.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:11,077 INFO L168 Benchmark]: RCFGBuilder took 249.98 ms. Allocated memory is still 127.9 MB. Free memory was 105.0 MB in the beginning and 103.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:11,077 INFO L168 Benchmark]: TraceAbstraction took 16354.54 ms. Allocated memory was 127.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 102.7 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 673.7 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:11,077 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 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.83 ms. Allocated memory is still 127.9 MB. Free memory was 107.5 MB in the beginning and 106.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.20 ms. Allocated memory is still 127.9 MB. Free memory was 106.1 MB in the beginning and 105.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 249.98 ms. Allocated memory is still 127.9 MB. Free memory was 105.0 MB in the beginning and 103.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16354.54 ms. Allocated memory was 127.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 102.7 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 673.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 100]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 69 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16275.2ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 647.4ms, AutomataDifference: 3347.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 169.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2083 SDtfs, 1333 SDslu, 7964 SDs, 0 SdLazy, 1605 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 769.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 640 SyntacticMatches, 26 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 837.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44258occurred in iteration=19, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5233.3ms AutomataMinimizationTime, 20 MinimizatonAttempts, 17483 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 104.4ms SsaConstructionTime, 331.3ms SatisfiabilityAnalysisTime, 3041.3ms InterpolantComputationTime, 1484 NumberOfCodeBlocks, 1475 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1451 ConstructedInterpolants, 0 QuantifiedInterpolants, 8762 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1054 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 33 InterpolantComputations, 7 PerfectInterpolantSequences, 101/557 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...