/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/popl20/min-max-inc-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:00:36,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:00:36,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:00:36,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:00:36,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:00:36,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:00:36,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:00:36,941 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 18:00:36,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:00:36,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:00:36,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:00:36,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:00:36,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:00:36,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:00:36,987 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:00:36,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:00:36,987 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:00:36,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:00:36,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:00:36,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:00:36,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:00:36,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:00:36,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:00:36,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:00:36,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:00:36,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:00:36,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:00:36,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:00:36,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:00:36,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:00:36,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:00:36,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:00:37,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:00:37,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:00:37,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:00:37,317 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:00:37,325 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:00:37,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl [2021-07-09 18:00:37,329 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl' [2021-07-09 18:00:37,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:00:37,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:00:37,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:00:37,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:00:37,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:00:37,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:00:37,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:00:37,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:00:37,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:00:37,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/1) ... [2021-07-09 18:00:37,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:00:37,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:00:37,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:00:37,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:00:37,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (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 18:00:37,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:00:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:00:37,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:00:37,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:00:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:00:37,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:00:37,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:00:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:00:37,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:00:37,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:00:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:00:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:00:37,578 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 18:00:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 18:00:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 18:00:37,578 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-07-09 18:00:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-07-09 18:00:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-07-09 18:00:37,579 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 18:00:37,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:00:37,843 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:00:37,845 INFO L202 PluginConnector]: Adding new model min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:00:37 BoogieIcfgContainer [2021-07-09 18:00:37,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:00:37,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:00:37,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:00:37,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:00:37,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:37" (1/2) ... [2021-07-09 18:00:37,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78604db1 and model type min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:00:37, skipping insertion in model container [2021-07-09 18:00:37,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:00:37" (2/2) ... [2021-07-09 18:00:37,851 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc-dec.wvr.bpl [2021-07-09 18:00:37,855 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:00:37,855 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:00:37,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:00:37,856 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:00:37,927 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-07-09 18:00:37,944 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-07-09 18:00:37,959 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:00:37,959 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:00:37,959 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:00:37,959 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:00:37,959 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:00:37,959 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:00:37,959 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:00:37,959 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:00:37,970 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 42 transitions, 124 flow [2021-07-09 18:00:38,094 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 0 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 18:00:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 0 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 18:00:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:00:38,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:38,128 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 18:00:38,129 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1163835750, now seen corresponding path program 1 times [2021-07-09 18:00:38,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:38,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497828678] [2021-07-09 18:00:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:38,347 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 18:00:38,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:38,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497828678] [2021-07-09 18:00:38,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497828678] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:38,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:38,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:00:38,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045649529] [2021-07-09 18:00:38,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:00:38,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:38,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:00:38,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:38,381 INFO L87 Difference]: Start difference. First operand has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 18:00:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:38,788 INFO L93 Difference]: Finished difference Result 13093 states and 60005 transitions. [2021-07-09 18:00:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 18:00:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:38,999 INFO L225 Difference]: With dead ends: 13093 [2021-07-09 18:00:39,000 INFO L226 Difference]: Without dead ends: 8907 [2021-07-09 18:00:39,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-07-09 18:00:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 3875. [2021-07-09 18:00:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.593959731543624) internal successors, (17797), 3874 states have internal predecessors, (17797), 0 states have call successors, (0), 0 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 18:00:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17797 transitions. [2021-07-09 18:00:39,299 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17797 transitions. Word has length 27 [2021-07-09 18:00:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:39,299 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17797 transitions. [2021-07-09 18:00:39,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 18:00:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17797 transitions. [2021-07-09 18:00:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:00:39,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:39,312 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 18:00:39,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:00:39,313 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:39,316 INFO L82 PathProgramCache]: Analyzing trace with hash 429888594, now seen corresponding path program 2 times [2021-07-09 18:00:39,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:39,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54795910] [2021-07-09 18:00:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:39,361 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 18:00:39,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:39,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54795910] [2021-07-09 18:00:39,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54795910] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:39,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:39,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:39,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753715714] [2021-07-09 18:00:39,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:39,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:39,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:39,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:39,367 INFO L87 Difference]: Start difference. First operand 3875 states and 17797 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 18:00:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:39,440 INFO L93 Difference]: Finished difference Result 4814 states and 21965 transitions. [2021-07-09 18:00:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:39,441 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 18:00:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:39,558 INFO L225 Difference]: With dead ends: 4814 [2021-07-09 18:00:39,558 INFO L226 Difference]: Without dead ends: 3427 [2021-07-09 18:00:39,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-07-09 18:00:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2021-07-09 18:00:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.5128429655575015) internal successors, (15461), 3426 states have internal predecessors, (15461), 0 states have call successors, (0), 0 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 18:00:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 15461 transitions. [2021-07-09 18:00:39,683 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 15461 transitions. Word has length 27 [2021-07-09 18:00:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:39,684 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 15461 transitions. [2021-07-09 18:00:39,685 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 18:00:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 15461 transitions. [2021-07-09 18:00:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:00:39,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:39,695 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 18:00:39,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:00:39,695 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:39,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1712459686, now seen corresponding path program 3 times [2021-07-09 18:00:39,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:39,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424831003] [2021-07-09 18:00:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:39,824 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 18:00:39,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:39,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424831003] [2021-07-09 18:00:39,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424831003] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:39,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:39,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:00:39,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703294544] [2021-07-09 18:00:39,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:00:39,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:39,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:00:39,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:39,826 INFO L87 Difference]: Start difference. First operand 3427 states and 15461 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 18:00:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:39,979 INFO L93 Difference]: Finished difference Result 13141 states and 59505 transitions. [2021-07-09 18:00:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 18:00:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:40,093 INFO L225 Difference]: With dead ends: 13141 [2021-07-09 18:00:40,093 INFO L226 Difference]: Without dead ends: 9627 [2021-07-09 18:00:40,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-07-09 18:00:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 3610. [2021-07-09 18:00:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3609 states have (on average 4.5259074535882515) internal successors, (16334), 3609 states have internal predecessors, (16334), 0 states have call successors, (0), 0 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 18:00:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 16334 transitions. [2021-07-09 18:00:40,262 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 16334 transitions. Word has length 27 [2021-07-09 18:00:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:40,263 INFO L482 AbstractCegarLoop]: Abstraction has 3610 states and 16334 transitions. [2021-07-09 18:00:40,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 18:00:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 16334 transitions. [2021-07-09 18:00:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:00:40,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:40,274 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 18:00:40,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:00:40,274 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:40,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2145849606, now seen corresponding path program 4 times [2021-07-09 18:00:40,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:40,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588850051] [2021-07-09 18:00:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:40,363 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 18:00:40,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:40,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588850051] [2021-07-09 18:00:40,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588850051] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:40,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:40,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:40,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687804731] [2021-07-09 18:00:40,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:40,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:40,365 INFO L87 Difference]: Start difference. First operand 3610 states and 16334 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 18:00:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:40,462 INFO L93 Difference]: Finished difference Result 4293 states and 19350 transitions. [2021-07-09 18:00:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:40,462 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 18:00:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:40,486 INFO L225 Difference]: With dead ends: 4293 [2021-07-09 18:00:40,486 INFO L226 Difference]: Without dead ends: 3354 [2021-07-09 18:00:40,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-07-09 18:00:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3354. [2021-07-09 18:00:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 4.470623322397853) internal successors, (14990), 3353 states have internal predecessors, (14990), 0 states have call successors, (0), 0 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 18:00:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 14990 transitions. [2021-07-09 18:00:40,583 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 14990 transitions. Word has length 27 [2021-07-09 18:00:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:40,583 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 14990 transitions. [2021-07-09 18:00:40,583 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 18:00:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 14990 transitions. [2021-07-09 18:00:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:40,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:40,593 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:40,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:00:40,594 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1566246808, now seen corresponding path program 1 times [2021-07-09 18:00:40,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:40,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188620200] [2021-07-09 18:00:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:40,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188620200] [2021-07-09 18:00:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188620200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426248686] [2021-07-09 18:00:40,667 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 18:00:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:40,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:00:40,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:40,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426248686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:40,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:40,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:00:40,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429355267] [2021-07-09 18:00:40,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:00:40,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:00:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:00:40,991 INFO L87 Difference]: Start difference. First operand 3354 states and 14990 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:41,105 INFO L93 Difference]: Finished difference Result 6670 states and 29656 transitions. [2021-07-09 18:00:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:00:41,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:41,135 INFO L225 Difference]: With dead ends: 6670 [2021-07-09 18:00:41,135 INFO L226 Difference]: Without dead ends: 6670 [2021-07-09 18:00:41,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:00:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2021-07-09 18:00:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 4206. [2021-07-09 18:00:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 4.520332936979786) internal successors, (19008), 4205 states have internal predecessors, (19008), 0 states have call successors, (0), 0 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 18:00:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 19008 transitions. [2021-07-09 18:00:41,320 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 19008 transitions. Word has length 29 [2021-07-09 18:00:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:41,320 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 19008 transitions. [2021-07-09 18:00:41,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 19008 transitions. [2021-07-09 18:00:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:41,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:41,334 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:41,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:41,549 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:41,550 INFO L82 PathProgramCache]: Analyzing trace with hash 433543324, now seen corresponding path program 1 times [2021-07-09 18:00:41,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:41,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956243647] [2021-07-09 18:00:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:41,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:41,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956243647] [2021-07-09 18:00:41,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956243647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:41,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100942245] [2021-07-09 18:00:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:00:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:41,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:00:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:41,739 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 18:00:41,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100942245] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:41,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:00:41,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-07-09 18:00:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452973628] [2021-07-09 18:00:41,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:41,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:41,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:41,741 INFO L87 Difference]: Start difference. First operand 4206 states and 19008 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:41,810 INFO L93 Difference]: Finished difference Result 5618 states and 25299 transitions. [2021-07-09 18:00:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:41,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:41,833 INFO L225 Difference]: With dead ends: 5618 [2021-07-09 18:00:41,833 INFO L226 Difference]: Without dead ends: 5418 [2021-07-09 18:00:41,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:00:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-07-09 18:00:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4426. [2021-07-09 18:00:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 4.55864406779661) internal successors, (20172), 4425 states have internal predecessors, (20172), 0 states have call successors, (0), 0 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 18:00:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 20172 transitions. [2021-07-09 18:00:41,972 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 20172 transitions. Word has length 29 [2021-07-09 18:00:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:41,972 INFO L482 AbstractCegarLoop]: Abstraction has 4426 states and 20172 transitions. [2021-07-09 18:00:41,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 20172 transitions. [2021-07-09 18:00:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:41,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:41,984 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:42,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:42,205 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:42,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1698649094, now seen corresponding path program 1 times [2021-07-09 18:00:42,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:42,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363734259] [2021-07-09 18:00:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:42,222 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 18:00:42,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:42,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363734259] [2021-07-09 18:00:42,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363734259] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:42,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:42,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140601685] [2021-07-09 18:00:42,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:42,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:42,224 INFO L87 Difference]: Start difference. First operand 4426 states and 20172 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:42,409 INFO L93 Difference]: Finished difference Result 7946 states and 35321 transitions. [2021-07-09 18:00:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:42,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:42,437 INFO L225 Difference]: With dead ends: 7946 [2021-07-09 18:00:42,437 INFO L226 Difference]: Without dead ends: 7848 [2021-07-09 18:00:42,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2021-07-09 18:00:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 6434. [2021-07-09 18:00:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 4.542048810819214) internal successors, (29219), 6433 states have internal predecessors, (29219), 0 states have call successors, (0), 0 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 18:00:42,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 29219 transitions. [2021-07-09 18:00:42,608 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 29219 transitions. Word has length 29 [2021-07-09 18:00:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:42,609 INFO L482 AbstractCegarLoop]: Abstraction has 6434 states and 29219 transitions. [2021-07-09 18:00:42,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 29219 transitions. [2021-07-09 18:00:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:42,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:42,627 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:42,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:00:42,627 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:42,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1904404146, now seen corresponding path program 1 times [2021-07-09 18:00:42,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:42,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763615943] [2021-07-09 18:00:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:42,655 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 18:00:42,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763615943] [2021-07-09 18:00:42,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763615943] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:42,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:42,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:42,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023809963] [2021-07-09 18:00:42,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:42,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:42,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:42,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:42,657 INFO L87 Difference]: Start difference. First operand 6434 states and 29219 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:42,767 INFO L93 Difference]: Finished difference Result 11319 states and 50308 transitions. [2021-07-09 18:00:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:42,815 INFO L225 Difference]: With dead ends: 11319 [2021-07-09 18:00:42,816 INFO L226 Difference]: Without dead ends: 11198 [2021-07-09 18:00:42,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2021-07-09 18:00:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 8925. [2021-07-09 18:00:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 4.6001792917974) internal successors, (41052), 8924 states have internal predecessors, (41052), 0 states have call successors, (0), 0 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 18:00:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 41052 transitions. [2021-07-09 18:00:43,133 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 41052 transitions. Word has length 29 [2021-07-09 18:00:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:43,134 INFO L482 AbstractCegarLoop]: Abstraction has 8925 states and 41052 transitions. [2021-07-09 18:00:43,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 41052 transitions. [2021-07-09 18:00:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:43,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:43,161 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:43,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 18:00:43,161 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash -488899552, now seen corresponding path program 2 times [2021-07-09 18:00:43,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:43,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892142492] [2021-07-09 18:00:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:43,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:43,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892142492] [2021-07-09 18:00:43,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892142492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:43,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735807540] [2021-07-09 18:00:43,217 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 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 18:00:43,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:43,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:00:43,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:43,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735807540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:43,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:43,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-07-09 18:00:43,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033868258] [2021-07-09 18:00:43,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:00:43,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:00:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:43,326 INFO L87 Difference]: Start difference. First operand 8925 states and 41052 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 18:00:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:44,059 INFO L93 Difference]: Finished difference Result 32299 states and 139445 transitions. [2021-07-09 18:00:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:00:44,060 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 29 [2021-07-09 18:00:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:44,183 INFO L225 Difference]: With dead ends: 32299 [2021-07-09 18:00:44,184 INFO L226 Difference]: Without dead ends: 25555 [2021-07-09 18:00:44,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:00:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25555 states. [2021-07-09 18:00:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25555 to 11171. [2021-07-09 18:00:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11171 states, 11170 states have (on average 4.575201432408236) internal successors, (51105), 11170 states have internal predecessors, (51105), 0 states have call successors, (0), 0 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 18:00:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11171 states to 11171 states and 51105 transitions. [2021-07-09 18:00:44,976 INFO L78 Accepts]: Start accepts. Automaton has 11171 states and 51105 transitions. Word has length 29 [2021-07-09 18:00:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:44,976 INFO L482 AbstractCegarLoop]: Abstraction has 11171 states and 51105 transitions. [2021-07-09 18:00:44,976 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 18:00:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 11171 states and 51105 transitions. [2021-07-09 18:00:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:45,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:45,035 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:45,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:45,249 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1050645784, now seen corresponding path program 2 times [2021-07-09 18:00:45,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:45,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956099088] [2021-07-09 18:00:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:45,272 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 18:00:45,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:45,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956099088] [2021-07-09 18:00:45,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956099088] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:45,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:45,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:45,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4382134] [2021-07-09 18:00:45,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:45,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:45,274 INFO L87 Difference]: Start difference. First operand 11171 states and 51105 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:45,468 INFO L93 Difference]: Finished difference Result 13617 states and 60966 transitions. [2021-07-09 18:00:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:45,518 INFO L225 Difference]: With dead ends: 13617 [2021-07-09 18:00:45,518 INFO L226 Difference]: Without dead ends: 13377 [2021-07-09 18:00:45,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13377 states. [2021-07-09 18:00:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13377 to 11217. [2021-07-09 18:00:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11217 states, 11216 states have (on average 4.5536733238231095) internal successors, (51074), 11216 states have internal predecessors, (51074), 0 states have call successors, (0), 0 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 18:00:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11217 states to 11217 states and 51074 transitions. [2021-07-09 18:00:45,948 INFO L78 Accepts]: Start accepts. Automaton has 11217 states and 51074 transitions. Word has length 29 [2021-07-09 18:00:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:45,949 INFO L482 AbstractCegarLoop]: Abstraction has 11217 states and 51074 transitions. [2021-07-09 18:00:45,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 11217 states and 51074 transitions. [2021-07-09 18:00:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:45,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:45,986 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:45,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 18:00:45,986 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash -439577730, now seen corresponding path program 2 times [2021-07-09 18:00:45,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:45,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591685381] [2021-07-09 18:00:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:46,050 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 18:00:46,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:46,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591685381] [2021-07-09 18:00:46,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591685381] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:46,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:46,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:46,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714895056] [2021-07-09 18:00:46,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:46,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:46,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:46,052 INFO L87 Difference]: Start difference. First operand 11217 states and 51074 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:46,285 INFO L93 Difference]: Finished difference Result 12377 states and 54923 transitions. [2021-07-09 18:00:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:00:46,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:46,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:46,372 INFO L225 Difference]: With dead ends: 12377 [2021-07-09 18:00:46,373 INFO L226 Difference]: Without dead ends: 12377 [2021-07-09 18:00:46,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12377 states. [2021-07-09 18:00:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12377 to 10689. [2021-07-09 18:00:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 4.55875748502994) internal successors, (48724), 10688 states have internal predecessors, (48724), 0 states have call successors, (0), 0 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 18:00:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 48724 transitions. [2021-07-09 18:00:46,768 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 48724 transitions. Word has length 29 [2021-07-09 18:00:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:46,768 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 48724 transitions. [2021-07-09 18:00:46,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 48724 transitions. [2021-07-09 18:00:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:46,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:46,797 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:46,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 18:00:46,797 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:46,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1843096386, now seen corresponding path program 3 times [2021-07-09 18:00:46,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:46,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875674454] [2021-07-09 18:00:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:46,867 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 18:00:46,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:46,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875674454] [2021-07-09 18:00:46,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875674454] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:46,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:46,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:46,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855994923] [2021-07-09 18:00:46,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:46,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:46,868 INFO L87 Difference]: Start difference. First operand 10689 states and 48724 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:46,974 INFO L93 Difference]: Finished difference Result 13645 states and 60695 transitions. [2021-07-09 18:00:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:00:46,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:47,022 INFO L225 Difference]: With dead ends: 13645 [2021-07-09 18:00:47,022 INFO L226 Difference]: Without dead ends: 13645 [2021-07-09 18:00:47,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:47,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13645 states. [2021-07-09 18:00:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13645 to 11058. [2021-07-09 18:00:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 11057 states have (on average 4.563353531699376) internal successors, (50457), 11057 states have internal predecessors, (50457), 0 states have call successors, (0), 0 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 18:00:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 50457 transitions. [2021-07-09 18:00:47,436 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 50457 transitions. Word has length 29 [2021-07-09 18:00:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:47,436 INFO L482 AbstractCegarLoop]: Abstraction has 11058 states and 50457 transitions. [2021-07-09 18:00:47,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 50457 transitions. [2021-07-09 18:00:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:47,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:47,461 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:47,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 18:00:47,461 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash 266466850, now seen corresponding path program 4 times [2021-07-09 18:00:47,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:47,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997211124] [2021-07-09 18:00:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:47,616 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 18:00:47,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997211124] [2021-07-09 18:00:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997211124] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:47,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:47,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:00:47,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834608664] [2021-07-09 18:00:47,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:00:47,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:00:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:47,617 INFO L87 Difference]: Start difference. First operand 11058 states and 50457 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:47,737 INFO L93 Difference]: Finished difference Result 16291 states and 70649 transitions. [2021-07-09 18:00:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:47,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:47,791 INFO L225 Difference]: With dead ends: 16291 [2021-07-09 18:00:47,791 INFO L226 Difference]: Without dead ends: 15970 [2021-07-09 18:00:47,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15970 states. [2021-07-09 18:00:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15970 to 11469. [2021-07-09 18:00:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11469 states, 11468 states have (on average 4.508719916288803) internal successors, (51706), 11468 states have internal predecessors, (51706), 0 states have call successors, (0), 0 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 18:00:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11469 states to 11469 states and 51706 transitions. [2021-07-09 18:00:48,191 INFO L78 Accepts]: Start accepts. Automaton has 11469 states and 51706 transitions. Word has length 29 [2021-07-09 18:00:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:48,191 INFO L482 AbstractCegarLoop]: Abstraction has 11469 states and 51706 transitions. [2021-07-09 18:00:48,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 11469 states and 51706 transitions. [2021-07-09 18:00:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:48,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:48,216 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:48,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 18:00:48,216 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash -825067438, now seen corresponding path program 2 times [2021-07-09 18:00:48,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:48,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840668976] [2021-07-09 18:00:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:48,245 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 18:00:48,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:48,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840668976] [2021-07-09 18:00:48,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840668976] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:48,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:48,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787683351] [2021-07-09 18:00:48,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:48,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:48,246 INFO L87 Difference]: Start difference. First operand 11469 states and 51706 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:48,344 INFO L93 Difference]: Finished difference Result 12834 states and 56257 transitions. [2021-07-09 18:00:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:48,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:48,500 INFO L225 Difference]: With dead ends: 12834 [2021-07-09 18:00:48,500 INFO L226 Difference]: Without dead ends: 12536 [2021-07-09 18:00:48,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12536 states. [2021-07-09 18:00:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12536 to 11045. [2021-07-09 18:00:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11045 states, 11044 states have (on average 4.486327417602318) internal successors, (49547), 11044 states have internal predecessors, (49547), 0 states have call successors, (0), 0 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 18:00:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11045 states to 11045 states and 49547 transitions. [2021-07-09 18:00:48,733 INFO L78 Accepts]: Start accepts. Automaton has 11045 states and 49547 transitions. Word has length 29 [2021-07-09 18:00:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:48,733 INFO L482 AbstractCegarLoop]: Abstraction has 11045 states and 49547 transitions. [2021-07-09 18:00:48,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 11045 states and 49547 transitions. [2021-07-09 18:00:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:48,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:48,757 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:48,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 18:00:48,758 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:48,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1522958180, now seen corresponding path program 3 times [2021-07-09 18:00:48,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:48,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523245982] [2021-07-09 18:00:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:48,949 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 18:00:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:48,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:48,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523245982] [2021-07-09 18:00:48,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523245982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:48,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573008451] [2021-07-09 18:00:48,951 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 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 18:00:48,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:00:48,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:48,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:00:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:49,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573008451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:49,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:49,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-07-09 18:00:49,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073472960] [2021-07-09 18:00:49,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:00:49,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:49,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:00:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:49,038 INFO L87 Difference]: Start difference. First operand 11045 states and 49547 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 18:00:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:50,041 INFO L93 Difference]: Finished difference Result 32160 states and 143469 transitions. [2021-07-09 18:00:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:00:50,041 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 29 [2021-07-09 18:00:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:50,091 INFO L225 Difference]: With dead ends: 32160 [2021-07-09 18:00:50,091 INFO L226 Difference]: Without dead ends: 14152 [2021-07-09 18:00:50,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:00:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14152 states. [2021-07-09 18:00:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14152 to 6271. [2021-07-09 18:00:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 4.431738437001595) internal successors, (27787), 6270 states have internal predecessors, (27787), 0 states have call successors, (0), 0 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 18:00:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 27787 transitions. [2021-07-09 18:00:50,295 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 27787 transitions. Word has length 29 [2021-07-09 18:00:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:50,296 INFO L482 AbstractCegarLoop]: Abstraction has 6271 states and 27787 transitions. [2021-07-09 18:00:50,296 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 18:00:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 27787 transitions. [2021-07-09 18:00:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:50,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:50,310 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:50,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:50,524 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1293669152, now seen corresponding path program 3 times [2021-07-09 18:00:50,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:50,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598693104] [2021-07-09 18:00:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:50,584 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 18:00:50,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598693104] [2021-07-09 18:00:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598693104] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:50,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:50,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:50,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448441797] [2021-07-09 18:00:50,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:50,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:50,585 INFO L87 Difference]: Start difference. First operand 6271 states and 27787 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:50,646 INFO L93 Difference]: Finished difference Result 6724 states and 29846 transitions. [2021-07-09 18:00:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:50,664 INFO L225 Difference]: With dead ends: 6724 [2021-07-09 18:00:50,665 INFO L226 Difference]: Without dead ends: 6130 [2021-07-09 18:00:50,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:50,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6130 states. [2021-07-09 18:00:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6130 to 5320. [2021-07-09 18:00:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5319 states have (on average 4.505170144764054) internal successors, (23963), 5319 states have internal predecessors, (23963), 0 states have call successors, (0), 0 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 18:00:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 23963 transitions. [2021-07-09 18:00:50,772 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 23963 transitions. Word has length 29 [2021-07-09 18:00:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:50,772 INFO L482 AbstractCegarLoop]: Abstraction has 5320 states and 23963 transitions. [2021-07-09 18:00:50,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:00:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 23963 transitions. [2021-07-09 18:00:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:50,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:50,783 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:50,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-09 18:00:50,783 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 903556046, now seen corresponding path program 1 times [2021-07-09 18:00:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:50,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709301536] [2021-07-09 18:00:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:50,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709301536] [2021-07-09 18:00:50,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709301536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569259681] [2021-07-09 18:00:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:00:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:50,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:00:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:51,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:00:51,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:51,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:51,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:51,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-07-09 18:00:51,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 18:00:51,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:51,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:51,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:51,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-09 18:00:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569259681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:51,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:51,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 18:00:51,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187608489] [2021-07-09 18:00:51,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:00:51,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:51,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:00:51,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:00:51,129 INFO L87 Difference]: Start difference. First operand 5320 states and 23963 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 18:00:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:51,415 INFO L93 Difference]: Finished difference Result 15401 states and 70028 transitions. [2021-07-09 18:00:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:00:51,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 35 [2021-07-09 18:00:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:51,513 INFO L225 Difference]: With dead ends: 15401 [2021-07-09 18:00:51,514 INFO L226 Difference]: Without dead ends: 9617 [2021-07-09 18:00:51,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:00:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9617 states. [2021-07-09 18:00:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9617 to 6899. [2021-07-09 18:00:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 6898 states have (on average 4.447521020585677) internal successors, (30679), 6898 states have internal predecessors, (30679), 0 states have call successors, (0), 0 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 18:00:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 30679 transitions. [2021-07-09 18:00:51,675 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 30679 transitions. Word has length 35 [2021-07-09 18:00:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:51,675 INFO L482 AbstractCegarLoop]: Abstraction has 6899 states and 30679 transitions. [2021-07-09 18:00:51,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 18:00:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 30679 transitions. [2021-07-09 18:00:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:51,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:51,691 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:51,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:00:51,909 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash -356412096, now seen corresponding path program 2 times [2021-07-09 18:00:51,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:51,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240603081] [2021-07-09 18:00:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:00:51,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:51,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240603081] [2021-07-09 18:00:51,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240603081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:51,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531829436] [2021-07-09 18:00:51,976 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 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 18:00:52,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:52,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:00:52,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:52,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:00:52,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:52,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:52,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:52,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:00:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:00:52,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531829436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:52,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:52,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:00:52,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913131941] [2021-07-09 18:00:52,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:00:52,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:52,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:00:52,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:52,081 INFO L87 Difference]: Start difference. First operand 6899 states and 30679 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:00:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:52,247 INFO L93 Difference]: Finished difference Result 13711 states and 61754 transitions. [2021-07-09 18:00:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2021-07-09 18:00:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:52,272 INFO L225 Difference]: With dead ends: 13711 [2021-07-09 18:00:52,272 INFO L226 Difference]: Without dead ends: 8117 [2021-07-09 18:00:52,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:00:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-07-09 18:00:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6184. [2021-07-09 18:00:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6183 states have (on average 4.44088630114831) internal successors, (27458), 6183 states have internal predecessors, (27458), 0 states have call successors, (0), 0 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 18:00:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 27458 transitions. [2021-07-09 18:00:52,587 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 27458 transitions. Word has length 35 [2021-07-09 18:00:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:52,587 INFO L482 AbstractCegarLoop]: Abstraction has 6184 states and 27458 transitions. [2021-07-09 18:00:52,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:00:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 27458 transitions. [2021-07-09 18:00:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:52,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:52,600 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:52,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:00:52,817 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:52,817 INFO L82 PathProgramCache]: Analyzing trace with hash -427040094, now seen corresponding path program 3 times [2021-07-09 18:00:52,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:52,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992519978] [2021-07-09 18:00:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:00:52,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992519978] [2021-07-09 18:00:52,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992519978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790461737] [2021-07-09 18:00:52,903 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 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 18:00:52,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:00:52,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:52,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:00:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:52,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:00:52,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:53,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:53,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:53,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:00:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:00:53,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790461737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:53,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:53,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:00:53,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358257000] [2021-07-09 18:00:53,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:00:53,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:53,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:00:53,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:00:53,039 INFO L87 Difference]: Start difference. First operand 6184 states and 27458 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:53,448 INFO L93 Difference]: Finished difference Result 16542 states and 75355 transitions. [2021-07-09 18:00:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:00:53,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:00:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:53,477 INFO L225 Difference]: With dead ends: 16542 [2021-07-09 18:00:53,477 INFO L226 Difference]: Without dead ends: 9202 [2021-07-09 18:00:53,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:00:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-07-09 18:00:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6580. [2021-07-09 18:00:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 6579 states have (on average 4.455692354461164) internal successors, (29314), 6579 states have internal predecessors, (29314), 0 states have call successors, (0), 0 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 18:00:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 29314 transitions. [2021-07-09 18:00:53,769 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 29314 transitions. Word has length 35 [2021-07-09 18:00:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:53,769 INFO L482 AbstractCegarLoop]: Abstraction has 6580 states and 29314 transitions. [2021-07-09 18:00:53,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 29314 transitions. [2021-07-09 18:00:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:53,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:53,783 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:53,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:53,985 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash -277867294, now seen corresponding path program 4 times [2021-07-09 18:00:53,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:53,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339110346] [2021-07-09 18:00:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:54,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:54,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339110346] [2021-07-09 18:00:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339110346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:54,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438652221] [2021-07-09 18:00:54,111 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 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 18:00:54,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:54,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:00:54,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:00:54,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:54,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:54,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:54,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-09 18:00:54,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-07-09 18:00:54,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:54,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:54,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:54,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-07-09 18:00:54,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:00:54,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:54,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:54,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:54,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:00:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:54,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438652221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:54,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:54,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:00:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821816522] [2021-07-09 18:00:54,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:00:54,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:54,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:00:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:00:54,302 INFO L87 Difference]: Start difference. First operand 6580 states and 29314 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:00:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:54,615 INFO L93 Difference]: Finished difference Result 12638 states and 57079 transitions. [2021-07-09 18:00:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:00:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2021-07-09 18:00:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:54,638 INFO L225 Difference]: With dead ends: 12638 [2021-07-09 18:00:54,638 INFO L226 Difference]: Without dead ends: 6958 [2021-07-09 18:00:54,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:00:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2021-07-09 18:00:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6767. [2021-07-09 18:00:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 4.428909252143068) internal successors, (29966), 6766 states have internal predecessors, (29966), 0 states have call successors, (0), 0 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 18:00:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 29966 transitions. [2021-07-09 18:00:54,841 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 29966 transitions. Word has length 35 [2021-07-09 18:00:54,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:54,841 INFO L482 AbstractCegarLoop]: Abstraction has 6767 states and 29966 transitions. [2021-07-09 18:00:54,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:00:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 29966 transitions. [2021-07-09 18:00:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:54,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:54,855 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:55,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:55,064 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash -379406552, now seen corresponding path program 5 times [2021-07-09 18:00:55,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:55,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359330989] [2021-07-09 18:00:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:55,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:55,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359330989] [2021-07-09 18:00:55,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359330989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:55,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237304188] [2021-07-09 18:00:55,226 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 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 18:00:55,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:00:55,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:55,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:00:55,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:55,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:00:55,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:55,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:55,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:55,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-09 18:00:55,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2021-07-09 18:00:55,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:55,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:55,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:55,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:16 [2021-07-09 18:00:55,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:00:55,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:55,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:55,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:55,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:00:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:55,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237304188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:55,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:55,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-09 18:00:55,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63656398] [2021-07-09 18:00:55,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:00:55,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:55,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:00:55,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:00:55,496 INFO L87 Difference]: Start difference. First operand 6767 states and 29966 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 18:00:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:55,896 INFO L93 Difference]: Finished difference Result 15857 states and 71535 transitions. [2021-07-09 18:00:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:00:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 35 [2021-07-09 18:00:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:55,932 INFO L225 Difference]: With dead ends: 15857 [2021-07-09 18:00:55,932 INFO L226 Difference]: Without dead ends: 6962 [2021-07-09 18:00:55,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:00:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2021-07-09 18:00:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6907. [2021-07-09 18:00:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 4.406602953953084) internal successors, (30432), 6906 states have internal predecessors, (30432), 0 states have call successors, (0), 0 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 18:00:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 30432 transitions. [2021-07-09 18:00:56,157 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 30432 transitions. Word has length 35 [2021-07-09 18:00:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:56,157 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 30432 transitions. [2021-07-09 18:00:56,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 18:00:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 30432 transitions. [2021-07-09 18:00:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:56,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:56,173 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:56,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:56,385 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash 702142476, now seen corresponding path program 6 times [2021-07-09 18:00:56,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:56,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314064679] [2021-07-09 18:00:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:56,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:56,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314064679] [2021-07-09 18:00:56,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314064679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:56,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584906772] [2021-07-09 18:00:56,516 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 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 18:00:56,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:00:56,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:56,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:00:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:56,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:00:56,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:56,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:56,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:56,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-09 18:00:56,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-07-09 18:00:56,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:56,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:56,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:56,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-07-09 18:00:56,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:00:56,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:56,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:56,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:56,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:00:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:56,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584906772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:56,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:56,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:00:56,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171506818] [2021-07-09 18:00:56,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:00:56,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:00:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:00:56,670 INFO L87 Difference]: Start difference. First operand 6907 states and 30432 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:56,928 INFO L93 Difference]: Finished difference Result 12818 states and 57681 transitions. [2021-07-09 18:00:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:00:56,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:00:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:56,950 INFO L225 Difference]: With dead ends: 12818 [2021-07-09 18:00:56,950 INFO L226 Difference]: Without dead ends: 7068 [2021-07-09 18:00:56,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:00:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2021-07-09 18:00:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 6751. [2021-07-09 18:00:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6751 states, 6750 states have (on average 4.431111111111111) internal successors, (29910), 6750 states have internal predecessors, (29910), 0 states have call successors, (0), 0 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 18:00:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 29910 transitions. [2021-07-09 18:00:57,240 INFO L78 Accepts]: Start accepts. Automaton has 6751 states and 29910 transitions. Word has length 35 [2021-07-09 18:00:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:57,240 INFO L482 AbstractCegarLoop]: Abstraction has 6751 states and 29910 transitions. [2021-07-09 18:00:57,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 6751 states and 29910 transitions. [2021-07-09 18:00:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:57,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:57,254 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:57,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:57,470 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:57,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1637524792, now seen corresponding path program 7 times [2021-07-09 18:00:57,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:57,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706535348] [2021-07-09 18:00:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:57,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:57,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706535348] [2021-07-09 18:00:57,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706535348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:57,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225881777] [2021-07-09 18:00:57,604 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 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 18:00:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:00:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:57,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:00:57,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:57,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:57,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:57,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-07-09 18:00:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 18:00:57,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:57,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:57,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:57,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-09 18:00:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:57,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225881777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:57,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:57,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:00:57,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008683237] [2021-07-09 18:00:57,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:00:57,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:00:57,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:00:57,759 INFO L87 Difference]: Start difference. First operand 6751 states and 29910 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:00:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:58,059 INFO L93 Difference]: Finished difference Result 15889 states and 71529 transitions. [2021-07-09 18:00:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:00:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2021-07-09 18:00:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:58,093 INFO L225 Difference]: With dead ends: 15889 [2021-07-09 18:00:58,093 INFO L226 Difference]: Without dead ends: 10209 [2021-07-09 18:00:58,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:00:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2021-07-09 18:00:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 6982. [2021-07-09 18:00:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 4.426729694886119) internal successors, (30903), 6981 states have internal predecessors, (30903), 0 states have call successors, (0), 0 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 18:00:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 30903 transitions. [2021-07-09 18:00:58,396 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 30903 transitions. Word has length 35 [2021-07-09 18:00:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:58,396 INFO L482 AbstractCegarLoop]: Abstraction has 6982 states and 30903 transitions. [2021-07-09 18:00:58,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:00:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 30903 transitions. [2021-07-09 18:00:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:00:58,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:58,411 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] [2021-07-09 18:00:58,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:00:58,627 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:58,628 INFO L82 PathProgramCache]: Analyzing trace with hash 711566540, now seen corresponding path program 8 times [2021-07-09 18:00:58,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:58,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863089183] [2021-07-09 18:00:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:58,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:58,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863089183] [2021-07-09 18:00:58,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863089183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:58,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740312821] [2021-07-09 18:00:58,651 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 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 18:00:58,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:58,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:58,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:00:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:58,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740312821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:58,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:58,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:00:58,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562718974] [2021-07-09 18:00:58,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:00:58,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:58,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:00:58,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:00:58,760 INFO L87 Difference]: Start difference. First operand 6982 states and 30903 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:58,931 INFO L93 Difference]: Finished difference Result 13835 states and 61629 transitions. [2021-07-09 18:00:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:58,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:00:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:58,981 INFO L225 Difference]: With dead ends: 13835 [2021-07-09 18:00:58,981 INFO L226 Difference]: Without dead ends: 13746 [2021-07-09 18:00:58,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:00:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13746 states. [2021-07-09 18:00:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13746 to 10302. [2021-07-09 18:00:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10302 states, 10301 states have (on average 4.570138821473643) internal successors, (47077), 10301 states have internal predecessors, (47077), 0 states have call successors, (0), 0 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 18:00:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10302 states to 10302 states and 47077 transitions. [2021-07-09 18:00:59,456 INFO L78 Accepts]: Start accepts. Automaton has 10302 states and 47077 transitions. Word has length 37 [2021-07-09 18:00:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:59,457 INFO L482 AbstractCegarLoop]: Abstraction has 10302 states and 47077 transitions. [2021-07-09 18:00:59,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 10302 states and 47077 transitions. [2021-07-09 18:00:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:00:59,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:59,479 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] [2021-07-09 18:00:59,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:00:59,693 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:00:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1970707116, now seen corresponding path program 9 times [2021-07-09 18:00:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:59,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753224606] [2021-07-09 18:00:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:59,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:59,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753224606] [2021-07-09 18:00:59,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753224606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:59,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573576069] [2021-07-09 18:00:59,768 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 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 18:00:59,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:00:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:00:59,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:59,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573576069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:59,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:59,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:00:59,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51496575] [2021-07-09 18:00:59,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:00:59,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:00:59,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:00:59,932 INFO L87 Difference]: Start difference. First operand 10302 states and 47077 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:01:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:00,833 INFO L93 Difference]: Finished difference Result 40272 states and 177348 transitions. [2021-07-09 18:01:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:01:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:01,104 INFO L225 Difference]: With dead ends: 40272 [2021-07-09 18:01:01,104 INFO L226 Difference]: Without dead ends: 40272 [2021-07-09 18:01:01,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:01:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-07-09 18:01:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 16146. [2021-07-09 18:01:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16146 states, 16145 states have (on average 4.708082997832146) internal successors, (76012), 16145 states have internal predecessors, (76012), 0 states have call successors, (0), 0 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 18:01:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 76012 transitions. [2021-07-09 18:01:02,123 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 76012 transitions. Word has length 37 [2021-07-09 18:01:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:02,124 INFO L482 AbstractCegarLoop]: Abstraction has 16146 states and 76012 transitions. [2021-07-09 18:01:02,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:01:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 76012 transitions. [2021-07-09 18:01:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:02,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:02,184 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] [2021-07-09 18:01:02,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:01:02,397 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:02,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:02,397 INFO L82 PathProgramCache]: Analyzing trace with hash -292754666, now seen corresponding path program 10 times [2021-07-09 18:01:02,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:02,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719517330] [2021-07-09 18:01:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:02,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:02,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719517330] [2021-07-09 18:01:02,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719517330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:02,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142118597] [2021-07-09 18:01:02,450 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:02,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:02,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:01:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:02,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142118597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:02,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:02,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:01:02,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836050595] [2021-07-09 18:01:02,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:02,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:02,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:02,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:02,584 INFO L87 Difference]: Start difference. First operand 16146 states and 76012 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 18:01:02,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:02,849 INFO L93 Difference]: Finished difference Result 24425 states and 114052 transitions. [2021-07-09 18:01:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:01:02,850 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 37 [2021-07-09 18:01:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:02,964 INFO L225 Difference]: With dead ends: 24425 [2021-07-09 18:01:02,964 INFO L226 Difference]: Without dead ends: 24375 [2021-07-09 18:01:02,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:01:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24375 states. [2021-07-09 18:01:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24375 to 18707. [2021-07-09 18:01:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18707 states, 18706 states have (on average 4.823265262482626) internal successors, (90224), 18706 states have internal predecessors, (90224), 0 states have call successors, (0), 0 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 18:01:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18707 states to 18707 states and 90224 transitions. [2021-07-09 18:01:03,785 INFO L78 Accepts]: Start accepts. Automaton has 18707 states and 90224 transitions. Word has length 37 [2021-07-09 18:01:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:03,787 INFO L482 AbstractCegarLoop]: Abstraction has 18707 states and 90224 transitions. [2021-07-09 18:01:03,787 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 18:01:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 18707 states and 90224 transitions. [2021-07-09 18:01:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:03,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:03,835 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] [2021-07-09 18:01:04,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:04,052 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash 119821430, now seen corresponding path program 11 times [2021-07-09 18:01:04,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:04,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167002805] [2021-07-09 18:01:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:04,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:04,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167002805] [2021-07-09 18:01:04,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167002805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:04,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688263441] [2021-07-09 18:01:04,110 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:04,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:01:04,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:04,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688263441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:04,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:04,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-07-09 18:01:04,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120926428] [2021-07-09 18:01:04,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:01:04,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:04,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:01:04,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:04,184 INFO L87 Difference]: Start difference. First operand 18707 states and 90224 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:04,439 INFO L93 Difference]: Finished difference Result 23270 states and 108541 transitions. [2021-07-09 18:01:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:01:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:04,542 INFO L225 Difference]: With dead ends: 23270 [2021-07-09 18:01:04,542 INFO L226 Difference]: Without dead ends: 23182 [2021-07-09 18:01:04,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23182 states. [2021-07-09 18:01:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23182 to 18276. [2021-07-09 18:01:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18276 states, 18275 states have (on average 4.814938440492476) internal successors, (87993), 18275 states have internal predecessors, (87993), 0 states have call successors, (0), 0 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 18:01:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18276 states to 18276 states and 87993 transitions. [2021-07-09 18:01:05,296 INFO L78 Accepts]: Start accepts. Automaton has 18276 states and 87993 transitions. Word has length 37 [2021-07-09 18:01:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:05,296 INFO L482 AbstractCegarLoop]: Abstraction has 18276 states and 87993 transitions. [2021-07-09 18:01:05,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 18276 states and 87993 transitions. [2021-07-09 18:01:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:05,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:05,349 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] [2021-07-09 18:01:05,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:01:05,565 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:05,566 INFO L82 PathProgramCache]: Analyzing trace with hash -757299736, now seen corresponding path program 12 times [2021-07-09 18:01:05,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:05,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530577092] [2021-07-09 18:01:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:05,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530577092] [2021-07-09 18:01:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530577092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357287516] [2021-07-09 18:01:05,615 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:05,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:05,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:05,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:01:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:05,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357287516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:05,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:05,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:01:05,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123887761] [2021-07-09 18:01:05,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:01:05,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:05,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:01:05,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:05,704 INFO L87 Difference]: Start difference. First operand 18276 states and 87993 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:05,984 INFO L93 Difference]: Finished difference Result 24535 states and 114793 transitions. [2021-07-09 18:01:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:01:05,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:06,097 INFO L225 Difference]: With dead ends: 24535 [2021-07-09 18:01:06,097 INFO L226 Difference]: Without dead ends: 24535 [2021-07-09 18:01:06,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24535 states. [2021-07-09 18:01:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24535 to 20564. [2021-07-09 18:01:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20564 states, 20563 states have (on average 4.77133686718864) internal successors, (98113), 20563 states have internal predecessors, (98113), 0 states have call successors, (0), 0 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 18:01:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20564 states to 20564 states and 98113 transitions. [2021-07-09 18:01:07,018 INFO L78 Accepts]: Start accepts. Automaton has 20564 states and 98113 transitions. Word has length 37 [2021-07-09 18:01:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:07,018 INFO L482 AbstractCegarLoop]: Abstraction has 20564 states and 98113 transitions. [2021-07-09 18:01:07,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 20564 states and 98113 transitions. [2021-07-09 18:01:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:07,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:07,077 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] [2021-07-09 18:01:07,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:01:07,291 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1051419172, now seen corresponding path program 13 times [2021-07-09 18:01:07,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:07,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264019659] [2021-07-09 18:01:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:07,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:07,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264019659] [2021-07-09 18:01:07,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264019659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:07,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705009971] [2021-07-09 18:01:07,332 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:07,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:07,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:07,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705009971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:07,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:07,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:01:07,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641625547] [2021-07-09 18:01:07,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:01:07,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:01:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:07,452 INFO L87 Difference]: Start difference. First operand 20564 states and 98113 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 18:01:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:08,120 INFO L93 Difference]: Finished difference Result 43836 states and 210360 transitions. [2021-07-09 18:01:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:01:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:08,323 INFO L225 Difference]: With dead ends: 43836 [2021-07-09 18:01:08,323 INFO L226 Difference]: Without dead ends: 40727 [2021-07-09 18:01:08,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40727 states. [2021-07-09 18:01:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40727 to 31768. [2021-07-09 18:01:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31768 states, 31767 states have (on average 4.9342084553152645) internal successors, (156745), 31767 states have internal predecessors, (156745), 0 states have call successors, (0), 0 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 18:01:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31768 states to 31768 states and 156745 transitions. [2021-07-09 18:01:09,872 INFO L78 Accepts]: Start accepts. Automaton has 31768 states and 156745 transitions. Word has length 37 [2021-07-09 18:01:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:09,876 INFO L482 AbstractCegarLoop]: Abstraction has 31768 states and 156745 transitions. [2021-07-09 18:01:09,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 18:01:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 31768 states and 156745 transitions. [2021-07-09 18:01:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:09,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:09,969 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] [2021-07-09 18:01:10,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:10,186 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash -200971488, now seen corresponding path program 14 times [2021-07-09 18:01:10,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:10,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381943254] [2021-07-09 18:01:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:10,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381943254] [2021-07-09 18:01:10,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381943254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842383029] [2021-07-09 18:01:10,253 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:10,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:10,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:10,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842383029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:10,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:10,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 18:01:10,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787874135] [2021-07-09 18:01:10,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:01:10,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:01:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:10,442 INFO L87 Difference]: Start difference. First operand 31768 states and 156745 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 18:01:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:13,044 INFO L93 Difference]: Finished difference Result 81749 states and 393631 transitions. [2021-07-09 18:01:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:01:13,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:13,748 INFO L225 Difference]: With dead ends: 81749 [2021-07-09 18:01:13,748 INFO L226 Difference]: Without dead ends: 81493 [2021-07-09 18:01:13,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:01:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81493 states. [2021-07-09 18:01:16,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81493 to 46870. [2021-07-09 18:01:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46870 states, 46869 states have (on average 5.118991230877552) internal successors, (239922), 46869 states have internal predecessors, (239922), 0 states have call successors, (0), 0 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 18:01:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46870 states to 46870 states and 239922 transitions. [2021-07-09 18:01:17,316 INFO L78 Accepts]: Start accepts. Automaton has 46870 states and 239922 transitions. Word has length 37 [2021-07-09 18:01:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:17,316 INFO L482 AbstractCegarLoop]: Abstraction has 46870 states and 239922 transitions. [2021-07-09 18:01:17,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 18:01:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 46870 states and 239922 transitions. [2021-07-09 18:01:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:17,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:17,476 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] [2021-07-09 18:01:17,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:01:17,692 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:17,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1976947100, now seen corresponding path program 15 times [2021-07-09 18:01:17,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:17,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907738560] [2021-07-09 18:01:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:17,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:17,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907738560] [2021-07-09 18:01:17,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907738560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:17,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121694466] [2021-07-09 18:01:17,715 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:17,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:01:17,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:17,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121694466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:17,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:17,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:01:17,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085873213] [2021-07-09 18:01:17,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:17,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:17,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:17,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:17,815 INFO L87 Difference]: Start difference. First operand 46870 states and 239922 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:18,967 INFO L93 Difference]: Finished difference Result 72260 states and 366738 transitions. [2021-07-09 18:01:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:01:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:19,784 INFO L225 Difference]: With dead ends: 72260 [2021-07-09 18:01:19,784 INFO L226 Difference]: Without dead ends: 71607 [2021-07-09 18:01:19,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:01:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71607 states. [2021-07-09 18:01:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71607 to 60533. [2021-07-09 18:01:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60533 states, 60532 states have (on average 5.215918852838168) internal successors, (315730), 60532 states have internal predecessors, (315730), 0 states have call successors, (0), 0 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 18:01:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60533 states to 60533 states and 315730 transitions. [2021-07-09 18:01:22,481 INFO L78 Accepts]: Start accepts. Automaton has 60533 states and 315730 transitions. Word has length 37 [2021-07-09 18:01:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:22,481 INFO L482 AbstractCegarLoop]: Abstraction has 60533 states and 315730 transitions. [2021-07-09 18:01:22,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 60533 states and 315730 transitions. [2021-07-09 18:01:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:22,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:22,753 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] [2021-07-09 18:01:22,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:22,969 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1193946592, now seen corresponding path program 16 times [2021-07-09 18:01:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:22,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9371758] [2021-07-09 18:01:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:22,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9371758] [2021-07-09 18:01:22,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9371758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363921420] [2021-07-09 18:01:22,994 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:23,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:23,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:23,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:23,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363921420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:23,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:23,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-09 18:01:23,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398730386] [2021-07-09 18:01:23,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:01:23,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:01:23,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:23,081 INFO L87 Difference]: Start difference. First operand 60533 states and 315730 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:24,293 INFO L93 Difference]: Finished difference Result 76219 states and 383006 transitions. [2021-07-09 18:01:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:01:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:24,709 INFO L225 Difference]: With dead ends: 76219 [2021-07-09 18:01:24,709 INFO L226 Difference]: Without dead ends: 75633 [2021-07-09 18:01:24,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75633 states. [2021-07-09 18:01:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75633 to 60771. [2021-07-09 18:01:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60771 states, 60770 states have (on average 5.169919368109264) internal successors, (314176), 60770 states have internal predecessors, (314176), 0 states have call successors, (0), 0 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 18:01:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60771 states to 60771 states and 314176 transitions. [2021-07-09 18:01:27,511 INFO L78 Accepts]: Start accepts. Automaton has 60771 states and 314176 transitions. Word has length 37 [2021-07-09 18:01:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:27,511 INFO L482 AbstractCegarLoop]: Abstraction has 60771 states and 314176 transitions. [2021-07-09 18:01:27,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 60771 states and 314176 transitions. [2021-07-09 18:01:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:27,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:27,749 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] [2021-07-09 18:01:28,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:01:28,332 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 900001624, now seen corresponding path program 17 times [2021-07-09 18:01:28,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:28,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016662315] [2021-07-09 18:01:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:28,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:28,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016662315] [2021-07-09 18:01:28,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016662315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:28,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972202825] [2021-07-09 18:01:28,358 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:28,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:01:28,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:28,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:28,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972202825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:28,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:28,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-09 18:01:28,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152192165] [2021-07-09 18:01:28,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:01:28,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:28,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:01:28,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:28,439 INFO L87 Difference]: Start difference. First operand 60771 states and 314176 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:29,462 INFO L93 Difference]: Finished difference Result 83670 states and 426544 transitions. [2021-07-09 18:01:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:01:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:29,907 INFO L225 Difference]: With dead ends: 83670 [2021-07-09 18:01:29,907 INFO L226 Difference]: Without dead ends: 83594 [2021-07-09 18:01:29,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83594 states. [2021-07-09 18:01:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83594 to 70109. [2021-07-09 18:01:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70109 states, 70108 states have (on average 5.258372796257203) internal successors, (368654), 70108 states have internal predecessors, (368654), 0 states have call successors, (0), 0 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 18:01:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70109 states to 70109 states and 368654 transitions. [2021-07-09 18:01:33,168 INFO L78 Accepts]: Start accepts. Automaton has 70109 states and 368654 transitions. Word has length 37 [2021-07-09 18:01:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:33,168 INFO L482 AbstractCegarLoop]: Abstraction has 70109 states and 368654 transitions. [2021-07-09 18:01:33,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 70109 states and 368654 transitions. [2021-07-09 18:01:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:33,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:33,440 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] [2021-07-09 18:01:34,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:01:34,065 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1766537048, now seen corresponding path program 18 times [2021-07-09 18:01:34,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:34,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521654805] [2021-07-09 18:01:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:34,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:34,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521654805] [2021-07-09 18:01:34,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521654805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:34,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261209121] [2021-07-09 18:01:34,108 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:34,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:34,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:34,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:34,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:34,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261209121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:34,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:34,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 18:01:34,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599305580] [2021-07-09 18:01:34,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:34,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:34,292 INFO L87 Difference]: Start difference. First operand 70109 states and 368654 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 18:01:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:35,754 INFO L93 Difference]: Finished difference Result 107900 states and 542604 transitions. [2021-07-09 18:01:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:01:35,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:37,137 INFO L225 Difference]: With dead ends: 107900 [2021-07-09 18:01:37,137 INFO L226 Difference]: Without dead ends: 107195 [2021-07-09 18:01:37,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:01:37,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107195 states. [2021-07-09 18:01:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107195 to 72498. [2021-07-09 18:01:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72498 states, 72497 states have (on average 5.256824420320841) internal successors, (381104), 72497 states have internal predecessors, (381104), 0 states have call successors, (0), 0 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 18:01:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72498 states to 72498 states and 381104 transitions. [2021-07-09 18:01:41,321 INFO L78 Accepts]: Start accepts. Automaton has 72498 states and 381104 transitions. Word has length 37 [2021-07-09 18:01:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:41,322 INFO L482 AbstractCegarLoop]: Abstraction has 72498 states and 381104 transitions. [2021-07-09 18:01:41,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 18:01:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 72498 states and 381104 transitions. [2021-07-09 18:01:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:01:41,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:41,629 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] [2021-07-09 18:01:41,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:41,846 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:41,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1164777964, now seen corresponding path program 19 times [2021-07-09 18:01:41,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:41,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193240573] [2021-07-09 18:01:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:41,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:41,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193240573] [2021-07-09 18:01:41,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193240573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026767466] [2021-07-09 18:01:41,915 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:41,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:42,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026767466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:42,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:42,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 18:01:42,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621509967] [2021-07-09 18:01:42,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:42,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:42,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:42,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:42,384 INFO L87 Difference]: Start difference. First operand 72498 states and 381104 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:43,615 INFO L93 Difference]: Finished difference Result 89407 states and 452990 transitions. [2021-07-09 18:01:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:01:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:01:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:44,374 INFO L225 Difference]: With dead ends: 89407 [2021-07-09 18:01:44,374 INFO L226 Difference]: Without dead ends: 87153 [2021-07-09 18:01:44,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:01:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87153 states. [2021-07-09 18:01:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87153 to 72603. [2021-07-09 18:01:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72603 states, 72602 states have (on average 5.200008264235145) internal successors, (377531), 72602 states have internal predecessors, (377531), 0 states have call successors, (0), 0 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 18:01:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72603 states to 72603 states and 377531 transitions. [2021-07-09 18:01:47,685 INFO L78 Accepts]: Start accepts. Automaton has 72603 states and 377531 transitions. Word has length 37 [2021-07-09 18:01:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:47,685 INFO L482 AbstractCegarLoop]: Abstraction has 72603 states and 377531 transitions. [2021-07-09 18:01:47,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 72603 states and 377531 transitions. [2021-07-09 18:01:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:01:47,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:47,952 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] [2021-07-09 18:01:48,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:01:48,157 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 18:01:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash -211695292, now seen corresponding path program 20 times [2021-07-09 18:01:48,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:48,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907259742] [2021-07-09 18:01:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:01:48,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907259742] [2021-07-09 18:01:48,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907259742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241928765] [2021-07-09 18:01:48,194 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:48,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:48,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:01:48,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:01:48,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241928765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:48,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:01:48,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124410167] [2021-07-09 18:01:48,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:01:48,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:01:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:48,293 INFO L87 Difference]: Start difference. First operand 72603 states and 377531 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:01:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:53,440 INFO L93 Difference]: Finished difference Result 269990 states and 1363141 transitions. [2021-07-09 18:01:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:01:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 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 39 [2021-07-09 18:01:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:56,328 INFO L225 Difference]: With dead ends: 269990 [2021-07-09 18:01:56,329 INFO L226 Difference]: Without dead ends: 264550 [2021-07-09 18:01:56,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:01:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264550 states. [2021-07-09 18:02:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264550 to 140265. [2021-07-09 18:02:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140265 states, 140264 states have (on average 5.258983060514458) internal successors, (737646), 140264 states have internal predecessors, (737646), 0 states have call successors, (0), 0 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 18:02:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140265 states to 140265 states and 737646 transitions. [2021-07-09 18:02:06,236 INFO L78 Accepts]: Start accepts. Automaton has 140265 states and 737646 transitions. Word has length 39 [2021-07-09 18:02:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:06,236 INFO L482 AbstractCegarLoop]: Abstraction has 140265 states and 737646 transitions. [2021-07-09 18:02:06,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:02:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 140265 states and 737646 transitions.