/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:17:31,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:17:31,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:17:31,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 07:17:31,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 07:17:31,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 07:17:31,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 07:17:31,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 07:17:31,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 07:17:31,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 07:17:31,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 07:17:31,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 07:17:31,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 07:17:31,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 07:17:31,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 07:17:31,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 07:17:31,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 07:17:31,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 07:17:31,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 07:17:31,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 07:17:31,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 07:17:31,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 07:17:31,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 07:17:31,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 07:17:31,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 07:17:31,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 07:17:31,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 07:17:31,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 07:17:31,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 07:17:31,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 07:17:31,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 07:17:31,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 07:17:31,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 07:17:31,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 07:17:31,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 07:17:31,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 07:17:31,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 07:17:31,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 07:17:31,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 07:17:31,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 07:17:31,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 07:17:31,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 07:17:31,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:17:31,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:17:31,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:17:31,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:17:31,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:17:31,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:17:31,121 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:17:31,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:17:31,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:17:31,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:17:31,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:17:31,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:17:31,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:17:31,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:17:31,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:17:31,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:17:31,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:17:31,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:17:31,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:17:31,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:17:31,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:17:31,124 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:17:31,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:17:31,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:17:31,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:17:31,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:17:31,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:17:31,361 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 07:17:31,362 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 07:17:31,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-06-05 07:17:31,363 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-06-05 07:17:31,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:17:31,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 07:17:31,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:17:31,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:17:31,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:17:31,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:17:31,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:17:31,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:17:31,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:17:31,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... [2021-06-05 07:17:31,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:17:31,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:17:31,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:17:31,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:17:31,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:17:31,514 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 07:17:31,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 07:17:31,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 07:17:31,515 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 07:17:31,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 07:17:31,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 07:17:31,515 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 07:17:31,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:17:31,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:17:31,516 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 07:17:31,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 07:17:31,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 07:17:31,516 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 07:17:31,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 07:17:31,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 07:17:31,517 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:17:31,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:17:31,702 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 07:17:31,703 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:17:31 BoogieIcfgContainer [2021-06-05 07:17:31,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:17:31,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:17:31,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:17:31,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:17:31,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:31" (1/2) ... [2021-06-05 07:17:31,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57036417 and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:17:31, skipping insertion in model container [2021-06-05 07:17:31,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:17:31" (2/2) ... [2021-06-05 07:17:31,707 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-06-05 07:17:31,711 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:17:31,711 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:17:31,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:17:31,712 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:17:31,778 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 07:17:31,791 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 07:17:31,821 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:17:31,821 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:17:31,821 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:17:31,821 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:17:31,821 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:17:31,821 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:17:31,821 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:17:31,821 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:17:31,827 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-06-05 07:17:31,860 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 07:17:31,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:31,872 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:31,873 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:31,876 INFO L82 PathProgramCache]: Analyzing trace with hash -39669396, now seen corresponding path program 1 times [2021-06-05 07:17:31,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:31,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635735510] [2021-06-05 07:17:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:31,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:31,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635735510] [2021-06-05 07:17:31,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635735510] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:31,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:31,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 07:17:31,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106526038] [2021-06-05 07:17:31,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 07:17:31,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:31,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 07:17:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:17:31,995 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:32,047 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-06-05 07:17:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 07:17:32,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 07:17:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:32,070 INFO L225 Difference]: With dead ends: 854 [2021-06-05 07:17:32,071 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 07:17:32,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:17:32,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 07:17:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-06-05 07:17:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-06-05 07:17:32,159 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-06-05 07:17:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:32,160 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-06-05 07:17:32,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-06-05 07:17:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:17:32,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:32,165 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:32,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:17:32,166 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1569931572, now seen corresponding path program 1 times [2021-06-05 07:17:32,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:32,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079808078] [2021-06-05 07:17:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:32,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:32,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079808078] [2021-06-05 07:17:32,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079808078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:32,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194067804] [2021-06-05 07:17:32,248 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 [2021-06-05 07:17:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 07:17:32,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:32,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194067804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:32,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:32,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 07:17:32,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893797462] [2021-06-05 07:17:32,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:32,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:32,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:32,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:32,423 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) 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) [2021-06-05 07:17:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:32,535 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-06-05 07:17:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:17:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) 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 21 [2021-06-05 07:17:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:32,547 INFO L225 Difference]: With dead ends: 1573 [2021-06-05 07:17:32,547 INFO L226 Difference]: Without dead ends: 1573 [2021-06-05 07:17:32,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:17:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-06-05 07:17:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-06-05 07:17:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-06-05 07:17:32,588 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-06-05 07:17:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:32,588 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-06-05 07:17:32,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) 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) [2021-06-05 07:17:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-06-05 07:17:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:17:32,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:32,591 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:32,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 07:17:32,805 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:32,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1597271150, now seen corresponding path program 1 times [2021-06-05 07:17:32,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:32,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514310948] [2021-06-05 07:17:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:32,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:32,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514310948] [2021-06-05 07:17:32,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514310948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:32,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438333483] [2021-06-05 07:17:32,862 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 [2021-06-05 07:17:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 07:17:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:32,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438333483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:32,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:32,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 07:17:32,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014484306] [2021-06-05 07:17:32,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:32,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:32,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:32,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:32,968 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:33,048 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-06-05 07:17:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:17:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:33,057 INFO L225 Difference]: With dead ends: 1748 [2021-06-05 07:17:33,057 INFO L226 Difference]: Without dead ends: 1748 [2021-06-05 07:17:33,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:17:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-06-05 07:17:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-06-05 07:17:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-06-05 07:17:33,090 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-06-05 07:17:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:33,090 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-06-05 07:17:33,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-06-05 07:17:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:17:33,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:33,093 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:33,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:33,310 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:33,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1296417938, now seen corresponding path program 1 times [2021-06-05 07:17:33,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:33,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604412386] [2021-06-05 07:17:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:33,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:33,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604412386] [2021-06-05 07:17:33,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604412386] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:33,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:33,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:17:33,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465639922] [2021-06-05 07:17:33,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:17:33,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:33,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:17:33,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:17:33,335 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:33,379 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-06-05 07:17:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:17:33,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:17:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:33,383 INFO L225 Difference]: With dead ends: 997 [2021-06-05 07:17:33,383 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 07:17:33,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:17:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 07:17:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-06-05 07:17:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-06-05 07:17:33,399 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-06-05 07:17:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:33,400 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-06-05 07:17:33,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,400 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-06-05 07:17:33,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:17:33,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:33,402 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:33,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 07:17:33,402 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:33,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:33,402 INFO L82 PathProgramCache]: Analyzing trace with hash -845683858, now seen corresponding path program 2 times [2021-06-05 07:17:33,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:33,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439489993] [2021-06-05 07:17:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:33,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:33,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439489993] [2021-06-05 07:17:33,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439489993] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:33,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:33,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:17:33,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494850453] [2021-06-05 07:17:33,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:17:33,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:33,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:17:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:17:33,431 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:33,465 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-06-05 07:17:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:17:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:17:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:33,469 INFO L225 Difference]: With dead ends: 949 [2021-06-05 07:17:33,469 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 07:17:33,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:17:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 07:17:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-06-05 07:17:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-06-05 07:17:33,487 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-06-05 07:17:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:33,487 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-06-05 07:17:33,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-06-05 07:17:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:33,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:33,489 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:33,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 07:17:33,489 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:33,490 INFO L82 PathProgramCache]: Analyzing trace with hash -105864754, now seen corresponding path program 1 times [2021-06-05 07:17:33,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:33,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814639275] [2021-06-05 07:17:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:33,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:33,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814639275] [2021-06-05 07:17:33,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814639275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:33,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810819734] [2021-06-05 07:17:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:17:33,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:33,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810819734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:33,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:33,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 07:17:33,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616487360] [2021-06-05 07:17:33,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:17:33,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:33,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:17:33,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:17:33,609 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-05 07:17:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:33,693 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-06-05 07:17:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 23 [2021-06-05 07:17:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:33,699 INFO L225 Difference]: With dead ends: 1389 [2021-06-05 07:17:33,699 INFO L226 Difference]: Without dead ends: 1389 [2021-06-05 07:17:33,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:17:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-06-05 07:17:33,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-06-05 07:17:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-06-05 07:17:33,718 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-06-05 07:17:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:33,718 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-06-05 07:17:33,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-05 07:17:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-06-05 07:17:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:33,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:33,720 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:33,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:33,933 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash 993256014, now seen corresponding path program 1 times [2021-06-05 07:17:33,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:33,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56469656] [2021-06-05 07:17:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:33,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:33,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56469656] [2021-06-05 07:17:33,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56469656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:33,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137544082] [2021-06-05 07:17:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:34,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:34,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137544082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:34,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:34,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:34,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798037160] [2021-06-05 07:17:34,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:34,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:34,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:34,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:34,053 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:34,096 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-06-05 07:17:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:34,104 INFO L225 Difference]: With dead ends: 1781 [2021-06-05 07:17:34,104 INFO L226 Difference]: Without dead ends: 1738 [2021-06-05 07:17:34,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-06-05 07:17:34,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-06-05 07:17:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-06-05 07:17:34,129 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-06-05 07:17:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:34,129 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-06-05 07:17:34,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-06-05 07:17:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:34,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:34,131 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:34,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:34,349 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-06-05 07:17:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:34,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993563054] [2021-06-05 07:17:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:34,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993563054] [2021-06-05 07:17:34,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993563054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387710836] [2021-06-05 07:17:34,388 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:34,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:34,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:34,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387710836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:34,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:34,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:34,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174735918] [2021-06-05 07:17:34,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:34,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:34,478 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:34,526 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-06-05 07:17:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:34,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:34,534 INFO L225 Difference]: With dead ends: 1504 [2021-06-05 07:17:34,534 INFO L226 Difference]: Without dead ends: 1461 [2021-06-05 07:17:34,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-06-05 07:17:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-06-05 07:17:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-06-05 07:17:34,560 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-06-05 07:17:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:34,561 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-06-05 07:17:34,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-06-05 07:17:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:34,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:34,564 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:34,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:34,781 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-06-05 07:17:34,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:34,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113667587] [2021-06-05 07:17:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:34,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:34,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113667587] [2021-06-05 07:17:34,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113667587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:34,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328078054] [2021-06-05 07:17:34,850 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:34,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:17:34,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:34,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328078054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:34,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:34,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:34,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536421931] [2021-06-05 07:17:34,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:34,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:34,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:34,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:34,938 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:34,982 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-06-05 07:17:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:34,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:34,989 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 07:17:34,989 INFO L226 Difference]: Without dead ends: 1401 [2021-06-05 07:17:34,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-05 07:17:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-06-05 07:17:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-06-05 07:17:35,028 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-06-05 07:17:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:35,029 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-06-05 07:17:35,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-06-05 07:17:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:35,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:35,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:35,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:35,250 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash -154583568, now seen corresponding path program 1 times [2021-06-05 07:17:35,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:35,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258473972] [2021-06-05 07:17:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:35,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:35,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258473972] [2021-06-05 07:17:35,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258473972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:35,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208861133] [2021-06-05 07:17:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:35,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:35,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:35,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208861133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:35,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:35,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:35,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34736926] [2021-06-05 07:17:35,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:35,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:35,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:35,374 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:35,438 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-06-05 07:17:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:35,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:35,449 INFO L225 Difference]: With dead ends: 2517 [2021-06-05 07:17:35,449 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 07:17:35,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 07:17:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-06-05 07:17:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-06-05 07:17:35,485 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-06-05 07:17:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:35,486 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-06-05 07:17:35,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-06-05 07:17:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:35,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:35,489 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:35,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 07:17:35,704 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:35,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1613744344, now seen corresponding path program 2 times [2021-06-05 07:17:35,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:35,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784069449] [2021-06-05 07:17:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:35,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784069449] [2021-06-05 07:17:35,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784069449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970879865] [2021-06-05 07:17:35,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:35,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:35,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:35,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970879865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:35,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:35,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:35,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859998711] [2021-06-05 07:17:35,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:35,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:35,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:35,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:35,829 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:35,884 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-06-05 07:17:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:35,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:35,890 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 07:17:35,890 INFO L226 Difference]: Without dead ends: 2085 [2021-06-05 07:17:35,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-06-05 07:17:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-06-05 07:17:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-06-05 07:17:35,921 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-06-05 07:17:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:35,922 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-06-05 07:17:35,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-06-05 07:17:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:35,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:35,925 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:36,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 07:17:36,133 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 909626392, now seen corresponding path program 3 times [2021-06-05 07:17:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:36,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492102695] [2021-06-05 07:17:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:36,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:36,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492102695] [2021-06-05 07:17:36,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492102695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:36,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061171019] [2021-06-05 07:17:36,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:36,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:17:36,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:36,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:36,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061171019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:36,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:36,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:36,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941367088] [2021-06-05 07:17:36,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:36,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:36,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:36,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:36,256 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:36,307 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-06-05 07:17:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:36,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:36,313 INFO L225 Difference]: With dead ends: 2247 [2021-06-05 07:17:36,313 INFO L226 Difference]: Without dead ends: 2204 [2021-06-05 07:17:36,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-05 07:17:36,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-06-05 07:17:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-06-05 07:17:36,341 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-06-05 07:17:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:36,341 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-06-05 07:17:36,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-06-05 07:17:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:36,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:36,343 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:36,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:36,559 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:36,559 INFO L82 PathProgramCache]: Analyzing trace with hash -461480336, now seen corresponding path program 1 times [2021-06-05 07:17:36,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:36,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197550796] [2021-06-05 07:17:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:36,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:36,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197550796] [2021-06-05 07:17:36,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197550796] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:36,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:36,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 07:17:36,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705955800] [2021-06-05 07:17:36,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:17:36,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:17:36,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:17:36,575 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:36,604 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-06-05 07:17:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 07:17:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:36,609 INFO L225 Difference]: With dead ends: 1413 [2021-06-05 07:17:36,609 INFO L226 Difference]: Without dead ends: 1413 [2021-06-05 07:17:36,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:17:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-05 07:17:36,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-06-05 07:17:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-06-05 07:17:36,633 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-06-05 07:17:36,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:36,633 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-06-05 07:17:36,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-06-05 07:17:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:36,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:36,636 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:36,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 07:17:36,636 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1970176528, now seen corresponding path program 4 times [2021-06-05 07:17:36,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:36,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207344230] [2021-06-05 07:17:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:36,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:36,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207344230] [2021-06-05 07:17:36,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207344230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:36,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633109890] [2021-06-05 07:17:36,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:36,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:17:36,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:36,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633109890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:36,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:36,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:36,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026782561] [2021-06-05 07:17:36,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:36,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:36,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:36,738 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:36,794 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-06-05 07:17:36,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:36,801 INFO L225 Difference]: With dead ends: 2930 [2021-06-05 07:17:36,801 INFO L226 Difference]: Without dead ends: 2887 [2021-06-05 07:17:36,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-06-05 07:17:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-06-05 07:17:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-06-05 07:17:36,838 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-06-05 07:17:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:36,838 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-06-05 07:17:36,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-06-05 07:17:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:36,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:36,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:37,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:37,057 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:37,057 INFO L82 PathProgramCache]: Analyzing trace with hash -210123588, now seen corresponding path program 5 times [2021-06-05 07:17:37,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:37,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219378303] [2021-06-05 07:17:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:37,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:37,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219378303] [2021-06-05 07:17:37,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219378303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:37,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457047349] [2021-06-05 07:17:37,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:37,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:17:37,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:37,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:37,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:37,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457047349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:37,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:37,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:37,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087621300] [2021-06-05 07:17:37,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:37,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:37,353 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:37,406 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-06-05 07:17:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:37,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:37,413 INFO L225 Difference]: With dead ends: 2434 [2021-06-05 07:17:37,413 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 07:17:37,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 07:17:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-06-05 07:17:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-06-05 07:17:37,447 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-06-05 07:17:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:37,447 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-06-05 07:17:37,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-06-05 07:17:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:37,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:37,451 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:37,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:17:37,665 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1981720148, now seen corresponding path program 6 times [2021-06-05 07:17:37,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:37,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907123006] [2021-06-05 07:17:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:37,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:37,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907123006] [2021-06-05 07:17:37,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907123006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:37,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677311100] [2021-06-05 07:17:37,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:37,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:17:37,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:37,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:37,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677311100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:37,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:37,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 07:17:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683126670] [2021-06-05 07:17:37,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:17:37,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:17:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:17:37,972 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-06-05 07:17:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:38,077 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-06-05 07:17:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 23 [2021-06-05 07:17:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:38,083 INFO L225 Difference]: With dead ends: 2600 [2021-06-05 07:17:38,083 INFO L226 Difference]: Without dead ends: 2557 [2021-06-05 07:17:38,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-06-05 07:17:38,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-06-05 07:17:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-06-05 07:17:38,124 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-06-05 07:17:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:38,124 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-06-05 07:17:38,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-06-05 07:17:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-06-05 07:17:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:38,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:38,127 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:38,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 07:17:38,341 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash 157052528, now seen corresponding path program 2 times [2021-06-05 07:17:38,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:38,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615002374] [2021-06-05 07:17:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:38,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:38,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615002374] [2021-06-05 07:17:38,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615002374] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:38,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:38,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:17:38,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881046003] [2021-06-05 07:17:38,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:17:38,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:17:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:17:38,359 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:38,404 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-06-05 07:17:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:17:38,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:38,409 INFO L225 Difference]: With dead ends: 1899 [2021-06-05 07:17:38,409 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 07:17:38,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:17:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 07:17:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-06-05 07:17:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-06-05 07:17:38,443 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-06-05 07:17:38,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:38,443 INFO L482 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-06-05 07:17:38,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-06-05 07:17:38,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:38,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:38,446 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:38,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 07:17:38,446 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:38,446 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-06-05 07:17:38,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:38,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520826745] [2021-06-05 07:17:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:38,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:38,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520826745] [2021-06-05 07:17:38,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520826745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:38,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323491847] [2021-06-05 07:17:38,470 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 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 [2021-06-05 07:17:38,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:38,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:38,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:17:38,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:38,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323491847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:38,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:38,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 07:17:38,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700327153] [2021-06-05 07:17:38,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:17:38,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:38,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:17:38,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:17:38,557 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:38,702 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-06-05 07:17:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:38,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:38,710 INFO L225 Difference]: With dead ends: 3584 [2021-06-05 07:17:38,710 INFO L226 Difference]: Without dead ends: 3584 [2021-06-05 07:17:38,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:17:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-06-05 07:17:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-06-05 07:17:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-06-05 07:17:38,759 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-06-05 07:17:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:38,759 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-06-05 07:17:38,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-06-05 07:17:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:38,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:38,763 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:38,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 07:17:38,974 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-06-05 07:17:38,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:38,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104918536] [2021-06-05 07:17:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:38,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104918536] [2021-06-05 07:17:38,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104918536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872612641] [2021-06-05 07:17:38,987 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 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 [2021-06-05 07:17:39,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:17:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:39,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:17:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:39,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872612641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:39,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:39,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 07:17:39,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672771469] [2021-06-05 07:17:39,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:17:39,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:17:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:17:39,068 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:39,264 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-06-05 07:17:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:17:39,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:39,271 INFO L225 Difference]: With dead ends: 4126 [2021-06-05 07:17:39,271 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 07:17:39,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:17:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 07:17:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-06-05 07:17:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-06-05 07:17:39,323 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-06-05 07:17:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:39,323 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-06-05 07:17:39,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-06-05 07:17:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:39,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:39,327 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:39,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:39,543 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:39,544 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-06-05 07:17:39,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:39,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616782739] [2021-06-05 07:17:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:39,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616782739] [2021-06-05 07:17:39,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616782739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136232806] [2021-06-05 07:17:39,594 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 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 [2021-06-05 07:17:39,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:17:39,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:39,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:39,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136232806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:39,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:39,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709697718] [2021-06-05 07:17:39,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:39,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:39,681 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:39,748 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-06-05 07:17:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:39,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:39,753 INFO L225 Difference]: With dead ends: 2707 [2021-06-05 07:17:39,753 INFO L226 Difference]: Without dead ends: 2643 [2021-06-05 07:17:39,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-06-05 07:17:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-06-05 07:17:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-06-05 07:17:39,830 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-06-05 07:17:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:39,830 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-06-05 07:17:39,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-06-05 07:17:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:39,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:39,834 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:40,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:40,045 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:40,045 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-06-05 07:17:40,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:40,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612664553] [2021-06-05 07:17:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:40,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:40,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612664553] [2021-06-05 07:17:40,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612664553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:40,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487156745] [2021-06-05 07:17:40,077 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:17:40,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:17:40,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:40,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:40,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487156745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:40,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:40,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:40,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791318191] [2021-06-05 07:17:40,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:40,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:40,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:40,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:40,138 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:40,189 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-06-05 07:17:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:40,194 INFO L225 Difference]: With dead ends: 2722 [2021-06-05 07:17:40,194 INFO L226 Difference]: Without dead ends: 2658 [2021-06-05 07:17:40,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-06-05 07:17:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-06-05 07:17:40,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-06-05 07:17:40,235 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-06-05 07:17:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:40,235 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-06-05 07:17:40,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-06-05 07:17:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:40,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:40,239 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:40,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:40,453 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-06-05 07:17:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:40,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291074941] [2021-06-05 07:17:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:40,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:40,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291074941] [2021-06-05 07:17:40,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291074941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:40,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957408376] [2021-06-05 07:17:40,488 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 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 [2021-06-05 07:17:40,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:17:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:40,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:17:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:40,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957408376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:40,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:40,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:17:40,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416377677] [2021-06-05 07:17:40,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:17:40,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:40,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:17:40,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:40,559 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:40,608 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-06-05 07:17:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:17:40,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:40,613 INFO L225 Difference]: With dead ends: 3086 [2021-06-05 07:17:40,613 INFO L226 Difference]: Without dead ends: 3022 [2021-06-05 07:17:40,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:17:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-06-05 07:17:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-06-05 07:17:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-06-05 07:17:40,655 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-06-05 07:17:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:40,655 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-06-05 07:17:40,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-06-05 07:17:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:40,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:40,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:40,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 07:17:40,877 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:40,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-06-05 07:17:40,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:40,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435371765] [2021-06-05 07:17:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:17:40,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435371765] [2021-06-05 07:17:40,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435371765] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:40,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:40,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:17:40,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369212285] [2021-06-05 07:17:40,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:17:40,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:17:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:17:40,893 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:40,929 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-06-05 07:17:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:17:40,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:40,933 INFO L225 Difference]: With dead ends: 2525 [2021-06-05 07:17:40,933 INFO L226 Difference]: Without dead ends: 2525 [2021-06-05 07:17:40,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:17:40,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-06-05 07:17:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-06-05 07:17:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-06-05 07:17:40,971 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-06-05 07:17:40,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:40,971 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-06-05 07:17:40,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-06-05 07:17:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:40,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:40,976 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:40,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 07:17:40,976 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-06-05 07:17:40,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:40,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920689829] [2021-06-05 07:17:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:40,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:40,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920689829] [2021-06-05 07:17:40,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920689829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:40,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357066943] [2021-06-05 07:17:40,996 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 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 [2021-06-05 07:17:41,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:17:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:17:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:41,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357066943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:41,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:41,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 07:17:41,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664975325] [2021-06-05 07:17:41,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:17:41,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:41,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:17:41,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:17:41,060 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:41,180 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-06-05 07:17:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:41,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:17:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:41,188 INFO L225 Difference]: With dead ends: 3537 [2021-06-05 07:17:41,188 INFO L226 Difference]: Without dead ends: 3537 [2021-06-05 07:17:41,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:17:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-06-05 07:17:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-06-05 07:17:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-06-05 07:17:41,246 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-06-05 07:17:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:41,246 INFO L482 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-06-05 07:17:41,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-06-05 07:17:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:41,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:41,252 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:41,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 07:17:41,457 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-06-05 07:17:41,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:41,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746340423] [2021-06-05 07:17:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:41,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:41,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746340423] [2021-06-05 07:17:41,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746340423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:41,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046772877] [2021-06-05 07:17:41,473 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 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 [2021-06-05 07:17:41,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:17:41,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:17:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:41,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046772877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:41,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:41,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 07:17:41,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349722712] [2021-06-05 07:17:41,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:17:41,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:17:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:17:41,562 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:41,681 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-06-05 07:17:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:41,692 INFO L225 Difference]: With dead ends: 5435 [2021-06-05 07:17:41,693 INFO L226 Difference]: Without dead ends: 5435 [2021-06-05 07:17:41,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:17:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-06-05 07:17:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-06-05 07:17:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-06-05 07:17:41,765 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-06-05 07:17:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:41,765 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-06-05 07:17:41,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-06-05 07:17:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:17:41,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:41,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:41,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 07:17:41,985 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:41,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-06-05 07:17:41,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:41,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825811266] [2021-06-05 07:17:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:42,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:42,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825811266] [2021-06-05 07:17:42,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825811266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:42,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119144815] [2021-06-05 07:17:42,001 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 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 [2021-06-05 07:17:42,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:17:42,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:17:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:42,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119144815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:42,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:42,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 07:17:42,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623921996] [2021-06-05 07:17:42,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:17:42,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:42,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:17:42,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:17:42,102 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:42,322 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-06-05 07:17:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:17:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 23 [2021-06-05 07:17:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:42,335 INFO L225 Difference]: With dead ends: 6635 [2021-06-05 07:17:42,336 INFO L226 Difference]: Without dead ends: 6635 [2021-06-05 07:17:42,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:17:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-06-05 07:17:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-06-05 07:17:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-06-05 07:17:42,437 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-06-05 07:17:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:42,437 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-06-05 07:17:42,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-06-05 07:17:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:42,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:42,445 INFO L521 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] [2021-06-05 07:17:42,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 07:17:42,661 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1097839692, now seen corresponding path program 7 times [2021-06-05 07:17:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:42,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382748198] [2021-06-05 07:17:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:42,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:42,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382748198] [2021-06-05 07:17:42,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382748198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:42,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304908966] [2021-06-05 07:17:42,686 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 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 [2021-06-05 07:17:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:17:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:42,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304908966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:42,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:42,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 07:17:42,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638715317] [2021-06-05 07:17:42,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:17:42,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:42,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:17:42,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:17:42,758 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:42,915 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-06-05 07:17:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:17:42,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:17:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:42,932 INFO L225 Difference]: With dead ends: 8080 [2021-06-05 07:17:42,932 INFO L226 Difference]: Without dead ends: 7806 [2021-06-05 07:17:42,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:17:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-06-05 07:17:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-06-05 07:17:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-06-05 07:17:43,044 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-06-05 07:17:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:43,044 INFO L482 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-06-05 07:17:43,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-06-05 07:17:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:43,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:43,055 INFO L521 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] [2021-06-05 07:17:43,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:17:43,256 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1886925744, now seen corresponding path program 4 times [2021-06-05 07:17:43,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:43,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87402151] [2021-06-05 07:17:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:43,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:43,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87402151] [2021-06-05 07:17:43,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87402151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:43,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811111581] [2021-06-05 07:17:43,311 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 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 [2021-06-05 07:17:43,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:17:43,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:17:43,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:43,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811111581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:43,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:43,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:17:43,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410830634] [2021-06-05 07:17:43,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:17:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:17:43,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:17:43,374 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:43,503 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-06-05 07:17:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:17:43,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:17:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:43,552 INFO L225 Difference]: With dead ends: 7686 [2021-06-05 07:17:43,552 INFO L226 Difference]: Without dead ends: 7610 [2021-06-05 07:17:43,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:17:43,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-06-05 07:17:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-06-05 07:17:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-06-05 07:17:43,667 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-06-05 07:17:43,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:43,667 INFO L482 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-06-05 07:17:43,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-06-05 07:17:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:43,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:43,678 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:43,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:43,893 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash -787804976, now seen corresponding path program 1 times [2021-06-05 07:17:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:43,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656137788] [2021-06-05 07:17:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:43,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:43,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656137788] [2021-06-05 07:17:43,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656137788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:43,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221027001] [2021-06-05 07:17:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-05 07:17:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:17:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:44,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221027001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:44,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:44,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 07:17:44,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540837022] [2021-06-05 07:17:44,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:17:44,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:17:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:17:44,020 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:44,387 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-06-05 07:17:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:17:44,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:17:44,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:44,417 INFO L225 Difference]: With dead ends: 13992 [2021-06-05 07:17:44,417 INFO L226 Difference]: Without dead ends: 13926 [2021-06-05 07:17:44,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:17:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-06-05 07:17:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-06-05 07:17:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-06-05 07:17:44,645 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-06-05 07:17:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:44,646 INFO L482 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-06-05 07:17:44,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-06-05 07:17:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:44,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:44,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:44,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 07:17:44,860 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:44,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:44,860 INFO L82 PathProgramCache]: Analyzing trace with hash -717911412, now seen corresponding path program 2 times [2021-06-05 07:17:44,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:44,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397098653] [2021-06-05 07:17:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:44,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:44,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397098653] [2021-06-05 07:17:44,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397098653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:44,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896981526] [2021-06-05 07:17:44,886 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 [2021-06-05 07:17:44,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:44,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:17:44,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:44,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896981526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:44,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:44,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 07:17:44,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844684304] [2021-06-05 07:17:44,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:17:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:17:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:17:44,980 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:45,385 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-06-05 07:17:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:17:45,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:17:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:45,415 INFO L225 Difference]: With dead ends: 12594 [2021-06-05 07:17:45,415 INFO L226 Difference]: Without dead ends: 12594 [2021-06-05 07:17:45,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:17:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-06-05 07:17:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-06-05 07:17:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-06-05 07:17:45,706 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-06-05 07:17:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:45,706 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-06-05 07:17:45,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-06-05 07:17:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:45,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:45,722 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:45,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:45,922 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1056551404, now seen corresponding path program 3 times [2021-06-05 07:17:45,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:45,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167702704] [2021-06-05 07:17:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:45,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:45,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167702704] [2021-06-05 07:17:45,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167702704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:45,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216287129] [2021-06-05 07:17:45,962 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:46,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:17:46,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:46,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:17:46,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:46,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216287129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:46,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:46,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:17:46,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581824184] [2021-06-05 07:17:46,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:17:46,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:17:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:46,121 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:46,810 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-06-05 07:17:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:17:46,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 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 25 [2021-06-05 07:17:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:46,893 INFO L225 Difference]: With dead ends: 29971 [2021-06-05 07:17:46,893 INFO L226 Difference]: Without dead ends: 29848 [2021-06-05 07:17:46,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:17:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-06-05 07:17:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-06-05 07:17:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-06-05 07:17:47,431 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-06-05 07:17:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:47,431 INFO L482 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-06-05 07:17:47,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-06-05 07:17:47,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:47,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:47,458 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:47,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 07:17:47,669 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash -839523414, now seen corresponding path program 4 times [2021-06-05 07:17:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:47,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576757160] [2021-06-05 07:17:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:47,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:47,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576757160] [2021-06-05 07:17:47,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576757160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:47,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513040675] [2021-06-05 07:17:47,713 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:47,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:17:47,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:47,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:17:47,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:47,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513040675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:47,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:47,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-05 07:17:47,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873364292] [2021-06-05 07:17:47,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:17:47,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:47,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:17:47,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:17:47,810 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:48,313 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-06-05 07:17:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:17:48,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:17:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:48,405 INFO L225 Difference]: With dead ends: 31001 [2021-06-05 07:17:48,405 INFO L226 Difference]: Without dead ends: 30851 [2021-06-05 07:17:48,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:17:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-06-05 07:17:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-06-05 07:17:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-06-05 07:17:49,036 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-06-05 07:17:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:49,036 INFO L482 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-06-05 07:17:49,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-06-05 07:17:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:49,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:49,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:49,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:49,285 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:49,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1905173876, now seen corresponding path program 5 times [2021-06-05 07:17:49,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:49,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745194800] [2021-06-05 07:17:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:49,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:49,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745194800] [2021-06-05 07:17:49,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745194800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:49,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094921878] [2021-06-05 07:17:49,342 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:49,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:49,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:49,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:17:49,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:49,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094921878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:49,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:49,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:17:49,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794860181] [2021-06-05 07:17:49,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:17:49,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:49,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:17:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:17:49,485 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-06-05 07:17:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:49,925 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-06-05 07:17:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:17:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-06-05 07:17:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:49,996 INFO L225 Difference]: With dead ends: 27651 [2021-06-05 07:17:49,996 INFO L226 Difference]: Without dead ends: 27523 [2021-06-05 07:17:49,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:17:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-06-05 07:17:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-06-05 07:17:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-06-05 07:17:50,473 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-06-05 07:17:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:50,473 INFO L482 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-06-05 07:17:50,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-06-05 07:17:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-06-05 07:17:50,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:50,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:50,515 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:50,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 07:17:50,716 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:50,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2009638882, now seen corresponding path program 6 times [2021-06-05 07:17:50,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:50,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39907106] [2021-06-05 07:17:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:50,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:50,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39907106] [2021-06-05 07:17:50,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39907106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:50,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195432131] [2021-06-05 07:17:50,769 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:50,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:17:50,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:50,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:17:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:50,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195432131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:50,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:50,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:17:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742113621] [2021-06-05 07:17:50,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:17:50,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:50,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:17:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:17:50,890 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 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) [2021-06-05 07:17:51,119 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2021-06-05 07:17:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:51,237 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-06-05 07:17:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:17:51,237 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 25 [2021-06-05 07:17:51,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:51,290 INFO L225 Difference]: With dead ends: 22500 [2021-06-05 07:17:51,290 INFO L226 Difference]: Without dead ends: 22316 [2021-06-05 07:17:51,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:17:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-06-05 07:17:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-06-05 07:17:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-06-05 07:17:51,831 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-06-05 07:17:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:51,831 INFO L482 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-06-05 07:17:51,831 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) [2021-06-05 07:17:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-06-05 07:17:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:51,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:51,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:52,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 07:17:52,080 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1604748080, now seen corresponding path program 7 times [2021-06-05 07:17:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:52,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38288243] [2021-06-05 07:17:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:52,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38288243] [2021-06-05 07:17:52,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38288243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264994041] [2021-06-05 07:17:52,128 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:17:52,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:52,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264994041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:52,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:52,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-05 07:17:52,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831715519] [2021-06-05 07:17:52,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:17:52,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:17:52,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:17:52,252 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:52,863 INFO L93 Difference]: Finished difference Result 37571 states and 165395 transitions. [2021-06-05 07:17:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:17:52,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:17:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:52,972 INFO L225 Difference]: With dead ends: 37571 [2021-06-05 07:17:52,972 INFO L226 Difference]: Without dead ends: 37406 [2021-06-05 07:17:52,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:17:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37406 states. [2021-06-05 07:17:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37406 to 25632. [2021-06-05 07:17:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25632 states, 25631 states have (on average 4.59131520424486) internal successors, (117680), 25631 states have internal predecessors, (117680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25632 states to 25632 states and 117680 transitions. [2021-06-05 07:17:53,719 INFO L78 Accepts]: Start accepts. Automaton has 25632 states and 117680 transitions. Word has length 25 [2021-06-05 07:17:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:53,719 INFO L482 AbstractCegarLoop]: Abstraction has 25632 states and 117680 transitions. [2021-06-05 07:17:53,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 25632 states and 117680 transitions. [2021-06-05 07:17:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:53,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:53,768 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:53,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 07:17:53,969 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash 544048456, now seen corresponding path program 8 times [2021-06-05 07:17:53,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:53,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804444241] [2021-06-05 07:17:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:54,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:54,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804444241] [2021-06-05 07:17:54,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804444241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:54,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990144825] [2021-06-05 07:17:54,031 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:17:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:54,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990144825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:54,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:54,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:17:54,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694316671] [2021-06-05 07:17:54,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:17:54,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:17:54,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:17:54,148 INFO L87 Difference]: Start difference. First operand 25632 states and 117680 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:54,619 INFO L93 Difference]: Finished difference Result 26558 states and 120874 transitions. [2021-06-05 07:17:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:17:54,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:17:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:54,707 INFO L225 Difference]: With dead ends: 26558 [2021-06-05 07:17:54,707 INFO L226 Difference]: Without dead ends: 26388 [2021-06-05 07:17:54,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:17:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26388 states. [2021-06-05 07:17:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26388 to 25652. [2021-06-05 07:17:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25651 states have (on average 4.589294764336673) internal successors, (117720), 25651 states have internal predecessors, (117720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 117720 transitions. [2021-06-05 07:17:55,335 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 117720 transitions. Word has length 25 [2021-06-05 07:17:55,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:55,336 INFO L482 AbstractCegarLoop]: Abstraction has 25652 states and 117720 transitions. [2021-06-05 07:17:55,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 117720 transitions. [2021-06-05 07:17:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:55,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:55,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:55,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:55,585 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash -792544304, now seen corresponding path program 1 times [2021-06-05 07:17:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:55,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929611681] [2021-06-05 07:17:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:55,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:55,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929611681] [2021-06-05 07:17:55,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929611681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:55,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798781550] [2021-06-05 07:17:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:55,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:17:55,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:55,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798781550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:55,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:55,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 07:17:55,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554441568] [2021-06-05 07:17:55,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:17:55,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:55,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:17:55,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:17:55,684 INFO L87 Difference]: Start difference. First operand 25652 states and 117720 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:56,030 INFO L93 Difference]: Finished difference Result 28634 states and 129447 transitions. [2021-06-05 07:17:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:17:56,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:17:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:56,337 INFO L225 Difference]: With dead ends: 28634 [2021-06-05 07:17:56,337 INFO L226 Difference]: Without dead ends: 28616 [2021-06-05 07:17:56,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2021-06-05 07:17:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 26082. [2021-06-05 07:17:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26082 states, 26081 states have (on average 4.586288869291821) internal successors, (119615), 26081 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26082 states to 26082 states and 119615 transitions. [2021-06-05 07:17:56,928 INFO L78 Accepts]: Start accepts. Automaton has 26082 states and 119615 transitions. Word has length 25 [2021-06-05 07:17:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:56,928 INFO L482 AbstractCegarLoop]: Abstraction has 26082 states and 119615 transitions. [2021-06-05 07:17:56,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 26082 states and 119615 transitions. [2021-06-05 07:17:56,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:56,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:56,979 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:57,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 07:17:57,180 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash -341810224, now seen corresponding path program 2 times [2021-06-05 07:17:57,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:57,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002159021] [2021-06-05 07:17:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:57,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:57,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002159021] [2021-06-05 07:17:57,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002159021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:57,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906658718] [2021-06-05 07:17:57,200 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:57,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:57,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:57,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:17:57,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:57,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906658718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:57,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:57,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 07:17:57,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835982548] [2021-06-05 07:17:57,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:17:57,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:57,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:17:57,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:17:57,281 INFO L87 Difference]: Start difference. First operand 26082 states and 119615 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) [2021-06-05 07:17:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:57,559 INFO L93 Difference]: Finished difference Result 30645 states and 137873 transitions. [2021-06-05 07:17:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:17:57,560 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 25 [2021-06-05 07:17:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:57,837 INFO L225 Difference]: With dead ends: 30645 [2021-06-05 07:17:57,838 INFO L226 Difference]: Without dead ends: 30645 [2021-06-05 07:17:57,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:17:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-06-05 07:17:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 25908. [2021-06-05 07:17:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 4.584243640714865) internal successors, (118764), 25907 states have internal predecessors, (118764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 118764 transitions. [2021-06-05 07:17:58,633 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 118764 transitions. Word has length 25 [2021-06-05 07:17:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:58,633 INFO L482 AbstractCegarLoop]: Abstraction has 25908 states and 118764 transitions. [2021-06-05 07:17:58,633 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) [2021-06-05 07:17:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 118764 transitions. [2021-06-05 07:17:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:17:58,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:58,685 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:58,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 07:17:58,893 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash 35028364, now seen corresponding path program 3 times [2021-06-05 07:17:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:58,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731842657] [2021-06-05 07:17:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:58,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:58,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731842657] [2021-06-05 07:17:58,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731842657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:58,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445867842] [2021-06-05 07:17:58,918 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:58,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:17:58,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:17:58,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:59,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445867842] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:59,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:17:59,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-06-05 07:17:59,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466989815] [2021-06-05 07:17:59,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:17:59,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:59,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:17:59,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:17:59,001 INFO L87 Difference]: Start difference. First operand 25908 states and 118764 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:59,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:59,294 INFO L93 Difference]: Finished difference Result 33932 states and 151310 transitions. [2021-06-05 07:17:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:17:59,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:17:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:59,387 INFO L225 Difference]: With dead ends: 33932 [2021-06-05 07:17:59,387 INFO L226 Difference]: Without dead ends: 33850 [2021-06-05 07:17:59,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:17:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2021-06-05 07:17:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 27223. [2021-06-05 07:18:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27223 states, 27222 states have (on average 4.581074131217398) internal successors, (124706), 27222 states have internal predecessors, (124706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27223 states to 27223 states and 124706 transitions. [2021-06-05 07:18:00,099 INFO L78 Accepts]: Start accepts. Automaton has 27223 states and 124706 transitions. Word has length 25 [2021-06-05 07:18:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:00,099 INFO L482 AbstractCegarLoop]: Abstraction has 27223 states and 124706 transitions. [2021-06-05 07:18:00,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 27223 states and 124706 transitions. [2021-06-05 07:18:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:00,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:00,152 INFO L521 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] [2021-06-05 07:18:00,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:00,432 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-06-05 07:18:00,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:00,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299483389] [2021-06-05 07:18:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:00,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:00,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299483389] [2021-06-05 07:18:00,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299483389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:00,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872820599] [2021-06-05 07:18:00,497 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:00,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:18:00,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:00,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:18:00,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:00,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872820599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:00,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:00,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:18:00,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692958487] [2021-06-05 07:18:00,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:18:00,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:18:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:18:00,570 INFO L87 Difference]: Start difference. First operand 27223 states and 124706 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:00,816 INFO L93 Difference]: Finished difference Result 29638 states and 134233 transitions. [2021-06-05 07:18:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:18:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:18:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:00,896 INFO L225 Difference]: With dead ends: 29638 [2021-06-05 07:18:00,896 INFO L226 Difference]: Without dead ends: 29562 [2021-06-05 07:18:00,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:18:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29562 states. [2021-06-05 07:18:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29562 to 27293. [2021-06-05 07:18:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27293 states, 27292 states have (on average 4.584017294445259) internal successors, (125107), 27292 states have internal predecessors, (125107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27293 states to 27293 states and 125107 transitions. [2021-06-05 07:18:01,578 INFO L78 Accepts]: Start accepts. Automaton has 27293 states and 125107 transitions. Word has length 25 [2021-06-05 07:18:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:01,578 INFO L482 AbstractCegarLoop]: Abstraction has 27293 states and 125107 transitions. [2021-06-05 07:18:01,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 27293 states and 125107 transitions. [2021-06-05 07:18:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:01,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:01,641 INFO L521 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] [2021-06-05 07:18:01,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 07:18:01,842 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-06-05 07:18:01,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:01,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110629527] [2021-06-05 07:18:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:01,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:01,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110629527] [2021-06-05 07:18:01,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110629527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:01,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48644276] [2021-06-05 07:18:01,903 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:01,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:18:01,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:18:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:01,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48644276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:01,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:01,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:18:01,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745718735] [2021-06-05 07:18:01,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:18:01,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:01,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:18:01,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:18:01,972 INFO L87 Difference]: Start difference. First operand 27293 states and 125107 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:02,274 INFO L93 Difference]: Finished difference Result 29552 states and 134049 transitions. [2021-06-05 07:18:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:18:02,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:18:02,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:02,536 INFO L225 Difference]: With dead ends: 29552 [2021-06-05 07:18:02,536 INFO L226 Difference]: Without dead ends: 29476 [2021-06-05 07:18:02,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:18:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-06-05 07:18:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 27436. [2021-06-05 07:18:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27436 states, 27435 states have (on average 4.586477127756515) internal successors, (125830), 27435 states have internal predecessors, (125830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27436 states to 27436 states and 125830 transitions. [2021-06-05 07:18:03,087 INFO L78 Accepts]: Start accepts. Automaton has 27436 states and 125830 transitions. Word has length 25 [2021-06-05 07:18:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:03,087 INFO L482 AbstractCegarLoop]: Abstraction has 27436 states and 125830 transitions. [2021-06-05 07:18:03,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27436 states and 125830 transitions. [2021-06-05 07:18:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:03,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:03,141 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:03,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:03,341 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:03,342 INFO L82 PathProgramCache]: Analyzing trace with hash -605061554, now seen corresponding path program 9 times [2021-06-05 07:18:03,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:03,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049138442] [2021-06-05 07:18:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:03,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:03,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049138442] [2021-06-05 07:18:03,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049138442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:03,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226102286] [2021-06-05 07:18:03,582 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:03,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:18:03,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:03,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:18:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:03,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226102286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:03,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:03,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 07:18:03,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814188822] [2021-06-05 07:18:03,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:18:03,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:18:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:18:03,692 INFO L87 Difference]: Start difference. First operand 27436 states and 125830 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:04,235 INFO L93 Difference]: Finished difference Result 58244 states and 263402 transitions. [2021-06-05 07:18:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:18:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:18:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:04,420 INFO L225 Difference]: With dead ends: 58244 [2021-06-05 07:18:04,420 INFO L226 Difference]: Without dead ends: 58083 [2021-06-05 07:18:04,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:18:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58083 states. [2021-06-05 07:18:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58083 to 50808. [2021-06-05 07:18:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50808 states, 50807 states have (on average 4.5649615210502485) internal successors, (231932), 50807 states have internal predecessors, (231932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50808 states to 50808 states and 231932 transitions. [2021-06-05 07:18:05,893 INFO L78 Accepts]: Start accepts. Automaton has 50808 states and 231932 transitions. Word has length 25 [2021-06-05 07:18:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:05,893 INFO L482 AbstractCegarLoop]: Abstraction has 50808 states and 231932 transitions. [2021-06-05 07:18:05,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 50808 states and 231932 transitions. [2021-06-05 07:18:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:06,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:06,007 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:06,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 07:18:06,207 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:06,207 INFO L82 PathProgramCache]: Analyzing trace with hash -535167990, now seen corresponding path program 10 times [2021-06-05 07:18:06,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:06,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815617029] [2021-06-05 07:18:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:06,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:06,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815617029] [2021-06-05 07:18:06,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815617029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:06,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013951883] [2021-06-05 07:18:06,232 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:06,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:18:06,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:06,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:18:06,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:06,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013951883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:06,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:06,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 07:18:06,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072406542] [2021-06-05 07:18:06,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:18:06,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:06,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:18:06,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:18:06,331 INFO L87 Difference]: Start difference. First operand 50808 states and 231932 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:07,370 INFO L93 Difference]: Finished difference Result 83779 states and 378490 transitions. [2021-06-05 07:18:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:18:07,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:18:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:07,642 INFO L225 Difference]: With dead ends: 83779 [2021-06-05 07:18:07,642 INFO L226 Difference]: Without dead ends: 83779 [2021-06-05 07:18:07,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:18:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83779 states. [2021-06-05 07:18:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83779 to 72653. [2021-06-05 07:18:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72653 states, 72652 states have (on average 4.592110334195893) internal successors, (333626), 72652 states have internal predecessors, (333626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72653 states to 72653 states and 333626 transitions. [2021-06-05 07:18:09,671 INFO L78 Accepts]: Start accepts. Automaton has 72653 states and 333626 transitions. Word has length 25 [2021-06-05 07:18:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:09,671 INFO L482 AbstractCegarLoop]: Abstraction has 72653 states and 333626 transitions. [2021-06-05 07:18:09,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 72653 states and 333626 transitions. [2021-06-05 07:18:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:09,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:09,824 INFO L521 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] [2021-06-05 07:18:10,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 07:18:10,025 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:10,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-06-05 07:18:10,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:10,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061901095] [2021-06-05 07:18:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:10,363 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 07:18:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:10,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:10,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061901095] [2021-06-05 07:18:10,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061901095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:10,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73317452] [2021-06-05 07:18:10,476 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:10,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:18:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:10,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73317452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:10,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:10,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:18:10,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503301572] [2021-06-05 07:18:10,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:18:10,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:10,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:18:10,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:18:10,597 INFO L87 Difference]: Start difference. First operand 72653 states and 333626 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:11,196 INFO L93 Difference]: Finished difference Result 74099 states and 339316 transitions. [2021-06-05 07:18:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:18:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:18:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:11,462 INFO L225 Difference]: With dead ends: 74099 [2021-06-05 07:18:11,462 INFO L226 Difference]: Without dead ends: 74023 [2021-06-05 07:18:11,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 432.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:18:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74023 states. [2021-06-05 07:18:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74023 to 72711. [2021-06-05 07:18:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72711 states, 72710 states have (on average 4.592366937147572) internal successors, (333911), 72710 states have internal predecessors, (333911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72711 states to 72711 states and 333911 transitions. [2021-06-05 07:18:13,467 INFO L78 Accepts]: Start accepts. Automaton has 72711 states and 333911 transitions. Word has length 25 [2021-06-05 07:18:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:13,467 INFO L482 AbstractCegarLoop]: Abstraction has 72711 states and 333911 transitions. [2021-06-05 07:18:13,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 72711 states and 333911 transitions. [2021-06-05 07:18:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:13,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:13,619 INFO L521 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] [2021-06-05 07:18:13,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 07:18:13,820 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:13,820 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-06-05 07:18:13,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:13,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847512246] [2021-06-05 07:18:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:18:13,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847512246] [2021-06-05 07:18:13,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847512246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326491015] [2021-06-05 07:18:13,880 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:13,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:18:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:18:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:18:13,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326491015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:13,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:13,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:18:13,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394403075] [2021-06-05 07:18:13,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:18:13,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:18:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:18:13,966 INFO L87 Difference]: Start difference. First operand 72711 states and 333911 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:14,813 INFO L93 Difference]: Finished difference Result 73874 states and 338535 transitions. [2021-06-05 07:18:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:18:14,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:18:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:15,058 INFO L225 Difference]: With dead ends: 73874 [2021-06-05 07:18:15,058 INFO L226 Difference]: Without dead ends: 73798 [2021-06-05 07:18:15,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:18:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2021-06-05 07:18:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 72769. [2021-06-05 07:18:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72769 states, 72768 states have (on average 4.592650615655233) internal successors, (334198), 72768 states have internal predecessors, (334198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72769 states to 72769 states and 334198 transitions. [2021-06-05 07:18:17,249 INFO L78 Accepts]: Start accepts. Automaton has 72769 states and 334198 transitions. Word has length 25 [2021-06-05 07:18:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:17,249 INFO L482 AbstractCegarLoop]: Abstraction has 72769 states and 334198 transitions. [2021-06-05 07:18:17,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 72769 states and 334198 transitions. [2021-06-05 07:18:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:17,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:17,406 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:17,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 07:18:17,606 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2072982634, now seen corresponding path program 11 times [2021-06-05 07:18:17,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:17,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524696017] [2021-06-05 07:18:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:17,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:17,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524696017] [2021-06-05 07:18:17,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524696017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:17,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096406950] [2021-06-05 07:18:17,634 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:17,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:18:17,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:17,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:18:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:17,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096406950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:17,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:17,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 07:18:17,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130895878] [2021-06-05 07:18:17,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:18:17,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:17,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:18:17,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:18:17,714 INFO L87 Difference]: Start difference. First operand 72769 states and 334198 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:18,882 INFO L93 Difference]: Finished difference Result 113780 states and 518908 transitions. [2021-06-05 07:18:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:18:18,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 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 25 [2021-06-05 07:18:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:19,296 INFO L225 Difference]: With dead ends: 113780 [2021-06-05 07:18:19,296 INFO L226 Difference]: Without dead ends: 113660 [2021-06-05 07:18:19,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:18:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113660 states. [2021-06-05 07:18:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113660 to 97354. [2021-06-05 07:18:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97354 states, 97353 states have (on average 4.601532567049809) internal successors, (447973), 97353 states have internal predecessors, (447973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97354 states to 97354 states and 447973 transitions. [2021-06-05 07:18:22,631 INFO L78 Accepts]: Start accepts. Automaton has 97354 states and 447973 transitions. Word has length 25 [2021-06-05 07:18:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:22,631 INFO L482 AbstractCegarLoop]: Abstraction has 97354 states and 447973 transitions. [2021-06-05 07:18:22,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 97354 states and 447973 transitions. [2021-06-05 07:18:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:22,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:22,855 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:23,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:23,055 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:23,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1816187858, now seen corresponding path program 12 times [2021-06-05 07:18:23,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:23,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297458276] [2021-06-05 07:18:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:23,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:23,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297458276] [2021-06-05 07:18:23,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297458276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:23,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762713307] [2021-06-05 07:18:23,094 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:23,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:18:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:18:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762713307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:23,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:23,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:18:23,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305119615] [2021-06-05 07:18:23,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:18:23,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:23,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:18:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:18:23,200 INFO L87 Difference]: Start difference. First operand 97354 states and 447973 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:25,029 INFO L93 Difference]: Finished difference Result 199161 states and 905866 transitions. [2021-06-05 07:18:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:18:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:18:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:26,261 INFO L225 Difference]: With dead ends: 199161 [2021-06-05 07:18:26,261 INFO L226 Difference]: Without dead ends: 199068 [2021-06-05 07:18:26,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:18:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199068 states. [2021-06-05 07:18:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199068 to 126471. [2021-06-05 07:18:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126471 states, 126470 states have (on average 4.598568830552701) internal successors, (581581), 126470 states have internal predecessors, (581581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126471 states to 126471 states and 581581 transitions. [2021-06-05 07:18:30,667 INFO L78 Accepts]: Start accepts. Automaton has 126471 states and 581581 transitions. Word has length 25 [2021-06-05 07:18:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:30,667 INFO L482 AbstractCegarLoop]: Abstraction has 126471 states and 581581 transitions. [2021-06-05 07:18:30,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 126471 states and 581581 transitions. [2021-06-05 07:18:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:30,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:30,911 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:31,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 07:18:31,112 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:31,112 INFO L82 PathProgramCache]: Analyzing trace with hash 193179122, now seen corresponding path program 13 times [2021-06-05 07:18:31,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:31,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208239790] [2021-06-05 07:18:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:31,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:31,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208239790] [2021-06-05 07:18:31,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208239790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:31,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217367378] [2021-06-05 07:18:31,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:31,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:18:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:31,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217367378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:31,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:31,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:18:31,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806769871] [2021-06-05 07:18:31,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:18:31,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:31,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:18:31,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:18:31,768 INFO L87 Difference]: Start difference. First operand 126471 states and 581581 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:33,551 INFO L93 Difference]: Finished difference Result 206475 states and 937233 transitions. [2021-06-05 07:18:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:18:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 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 25 [2021-06-05 07:18:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:34,323 INFO L225 Difference]: With dead ends: 206475 [2021-06-05 07:18:34,323 INFO L226 Difference]: Without dead ends: 206475 [2021-06-05 07:18:34,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 634.6ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:18:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206475 states. [2021-06-05 07:18:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206475 to 146245. [2021-06-05 07:18:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146245 states, 146244 states have (on average 4.6125037608380515) internal successors, (674551), 146244 states have internal predecessors, (674551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146245 states to 146245 states and 674551 transitions. [2021-06-05 07:18:39,655 INFO L78 Accepts]: Start accepts. Automaton has 146245 states and 674551 transitions. Word has length 25 [2021-06-05 07:18:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:39,655 INFO L482 AbstractCegarLoop]: Abstraction has 146245 states and 674551 transitions. [2021-06-05 07:18:39,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 146245 states and 674551 transitions. [2021-06-05 07:18:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:39,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:39,961 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:40,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:40,162 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:40,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:40,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2033215848, now seen corresponding path program 14 times [2021-06-05 07:18:40,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:40,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119881823] [2021-06-05 07:18:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:40,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119881823] [2021-06-05 07:18:40,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119881823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261793997] [2021-06-05 07:18:40,200 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:18:40,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:18:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:18:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:40,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261793997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:40,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:40,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-05 07:18:40,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137784335] [2021-06-05 07:18:40,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:18:40,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:18:40,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:18:40,300 INFO L87 Difference]: Start difference. First operand 146245 states and 674551 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:41,971 INFO L93 Difference]: Finished difference Result 158888 states and 723911 transitions. [2021-06-05 07:18:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:18:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 25 [2021-06-05 07:18:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:43,003 INFO L225 Difference]: With dead ends: 158888 [2021-06-05 07:18:43,003 INFO L226 Difference]: Without dead ends: 158813 [2021-06-05 07:18:43,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:18:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158813 states. [2021-06-05 07:18:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158813 to 150237. [2021-06-05 07:18:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150237 states, 150236 states have (on average 4.599729758513273) internal successors, (691045), 150236 states have internal predecessors, (691045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150237 states to 150237 states and 691045 transitions. [2021-06-05 07:18:47,472 INFO L78 Accepts]: Start accepts. Automaton has 150237 states and 691045 transitions. Word has length 25 [2021-06-05 07:18:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:47,473 INFO L482 AbstractCegarLoop]: Abstraction has 150237 states and 691045 transitions. [2021-06-05 07:18:47,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 150237 states and 691045 transitions. [2021-06-05 07:18:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:48,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:48,382 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:48,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:48,582 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:48,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:48,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1990562746, now seen corresponding path program 15 times [2021-06-05 07:18:48,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:48,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994230704] [2021-06-05 07:18:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:48,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:48,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994230704] [2021-06-05 07:18:48,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994230704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:48,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136083423] [2021-06-05 07:18:48,622 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:48,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:18:48,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:18:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:48,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136083423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:48,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:48,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:18:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172759507] [2021-06-05 07:18:48,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:18:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:18:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:18:48,760 INFO L87 Difference]: Start difference. First operand 150237 states and 691045 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2021-06-05 07:18:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:51,678 INFO L93 Difference]: Finished difference Result 274279 states and 1232729 transitions. [2021-06-05 07:18:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:18:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 25 [2021-06-05 07:18:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:52,959 INFO L225 Difference]: With dead ends: 274279 [2021-06-05 07:18:52,960 INFO L226 Difference]: Without dead ends: 274261 [2021-06-05 07:18:52,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:18:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274261 states. [2021-06-05 07:18:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274261 to 150288. [2021-06-05 07:18:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150288 states, 150287 states have (on average 4.600091824309488) internal successors, (691334), 150287 states have internal predecessors, (691334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150288 states to 150288 states and 691334 transitions. [2021-06-05 07:18:58,592 INFO L78 Accepts]: Start accepts. Automaton has 150288 states and 691334 transitions. Word has length 25 [2021-06-05 07:18:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:58,592 INFO L482 AbstractCegarLoop]: Abstraction has 150288 states and 691334 transitions. [2021-06-05 07:18:58,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2021-06-05 07:18:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 150288 states and 691334 transitions. [2021-06-05 07:18:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:18:58,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:58,920 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:59,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 07:18:59,121 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash 681395814, now seen corresponding path program 16 times [2021-06-05 07:18:59,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:59,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818411792] [2021-06-05 07:18:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:59,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:59,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818411792] [2021-06-05 07:18:59,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818411792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:59,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332449466] [2021-06-05 07:18:59,156 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:59,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:18:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:18:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332449466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:59,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:59,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:18:59,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390557178] [2021-06-05 07:18:59,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:18:59,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:18:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:18:59,268 INFO L87 Difference]: Start difference. First operand 150288 states and 691334 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:01,285 INFO L93 Difference]: Finished difference Result 228605 states and 1039503 transitions. [2021-06-05 07:19:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:19:01,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:19:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:02,609 INFO L225 Difference]: With dead ends: 228605 [2021-06-05 07:19:02,609 INFO L226 Difference]: Without dead ends: 228605 [2021-06-05 07:19:02,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:19:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228605 states. [2021-06-05 07:19:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228605 to 150267. [2021-06-05 07:19:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150267 states, 150266 states have (on average 4.600089175195985) internal successors, (691237), 150266 states have internal predecessors, (691237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150267 states to 150267 states and 691237 transitions. [2021-06-05 07:19:07,437 INFO L78 Accepts]: Start accepts. Automaton has 150267 states and 691237 transitions. Word has length 25 [2021-06-05 07:19:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:07,437 INFO L482 AbstractCegarLoop]: Abstraction has 150267 states and 691237 transitions. [2021-06-05 07:19:07,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 150267 states and 691237 transitions. [2021-06-05 07:19:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:19:08,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:08,353 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:08,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:08,561 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:08,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1939792664, now seen corresponding path program 17 times [2021-06-05 07:19:08,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:08,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527053288] [2021-06-05 07:19:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:08,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:08,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527053288] [2021-06-05 07:19:08,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527053288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:08,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077371740] [2021-06-05 07:19:08,604 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:08,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:19:08,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:08,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:19:08,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:08,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077371740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:08,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:08,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:19:08,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318953760] [2021-06-05 07:19:08,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:19:08,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:08,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:19:08,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:19:08,715 INFO L87 Difference]: Start difference. First operand 150267 states and 691237 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:10,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:10,492 INFO L93 Difference]: Finished difference Result 181963 states and 827326 transitions. [2021-06-05 07:19:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:19:10,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:19:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:11,127 INFO L225 Difference]: With dead ends: 181963 [2021-06-05 07:19:11,127 INFO L226 Difference]: Without dead ends: 181963 [2021-06-05 07:19:11,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:19:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181963 states. [2021-06-05 07:19:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181963 to 150263. [2021-06-05 07:19:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150263 states, 150262 states have (on average 4.600091839586855) internal successors, (691219), 150262 states have internal predecessors, (691219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150263 states to 150263 states and 691219 transitions. [2021-06-05 07:19:15,545 INFO L78 Accepts]: Start accepts. Automaton has 150263 states and 691219 transitions. Word has length 25 [2021-06-05 07:19:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:15,545 INFO L482 AbstractCegarLoop]: Abstraction has 150263 states and 691219 transitions. [2021-06-05 07:19:15,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 150263 states and 691219 transitions. [2021-06-05 07:19:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:19:16,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:16,459 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:16,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 07:19:16,660 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash -186895918, now seen corresponding path program 18 times [2021-06-05 07:19:16,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:16,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589904974] [2021-06-05 07:19:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:16,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:16,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589904974] [2021-06-05 07:19:16,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589904974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:16,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080797365] [2021-06-05 07:19:16,700 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:16,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:19:16,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:16,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:19:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:16,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080797365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:16,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:16,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-05 07:19:16,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115819965] [2021-06-05 07:19:16,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:19:16,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:16,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:19:16,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:19:16,794 INFO L87 Difference]: Start difference. First operand 150263 states and 691219 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-06-05 07:19:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:18,477 INFO L93 Difference]: Finished difference Result 192198 states and 881415 transitions. [2021-06-05 07:19:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:19:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 25 [2021-06-05 07:19:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:19,159 INFO L225 Difference]: With dead ends: 192198 [2021-06-05 07:19:19,159 INFO L226 Difference]: Without dead ends: 192052 [2021-06-05 07:19:19,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:19:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192052 states. [2021-06-05 07:19:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192052 to 150747. [2021-06-05 07:19:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150747 states, 150746 states have (on average 4.600427208682154) internal successors, (693496), 150746 states have internal predecessors, (693496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150747 states to 150747 states and 693496 transitions. [2021-06-05 07:19:23,977 INFO L78 Accepts]: Start accepts. Automaton has 150747 states and 693496 transitions. Word has length 25 [2021-06-05 07:19:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:23,977 INFO L482 AbstractCegarLoop]: Abstraction has 150747 states and 693496 transitions. [2021-06-05 07:19:23,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-06-05 07:19:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 150747 states and 693496 transitions. [2021-06-05 07:19:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:19:24,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:24,353 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:24,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:24,553 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash -567050456, now seen corresponding path program 19 times [2021-06-05 07:19:24,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:24,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541170566] [2021-06-05 07:19:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:24,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:24,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541170566] [2021-06-05 07:19:24,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541170566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:24,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101684629] [2021-06-05 07:19:24,605 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:24,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:19:24,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:24,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101684629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:24,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:24,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 07:19:24,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524535691] [2021-06-05 07:19:24,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:19:24,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:24,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:19:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:19:24,689 INFO L87 Difference]: Start difference. First operand 150747 states and 693496 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) [2021-06-05 07:19:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:26,242 INFO L93 Difference]: Finished difference Result 151664 states and 696652 transitions. [2021-06-05 07:19:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:19:26,243 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 25 [2021-06-05 07:19:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:26,798 INFO L225 Difference]: With dead ends: 151664 [2021-06-05 07:19:26,798 INFO L226 Difference]: Without dead ends: 151407 [2021-06-05 07:19:26,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:19:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151407 states. [2021-06-05 07:19:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151407 to 150715. [2021-06-05 07:19:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150715 states, 150714 states have (on average 4.600030521384874) internal successors, (693289), 150714 states have internal predecessors, (693289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150715 states to 150715 states and 693289 transitions. [2021-06-05 07:19:31,157 INFO L78 Accepts]: Start accepts. Automaton has 150715 states and 693289 transitions. Word has length 25 [2021-06-05 07:19:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:31,157 INFO L482 AbstractCegarLoop]: Abstraction has 150715 states and 693289 transitions. [2021-06-05 07:19:31,157 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) [2021-06-05 07:19:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 150715 states and 693289 transitions. [2021-06-05 07:19:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:19:31,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:31,467 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:31,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 07:19:31,667 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:31,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1169845454, now seen corresponding path program 20 times [2021-06-05 07:19:31,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:31,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452148022] [2021-06-05 07:19:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:31,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:31,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452148022] [2021-06-05 07:19:31,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452148022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:31,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78981521] [2021-06-05 07:19:31,726 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:31,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:19:31,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:31,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:19:31,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:31,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78981521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:31,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:31,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 07:19:31,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250066708] [2021-06-05 07:19:31,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:19:31,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:19:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:19:31,848 INFO L87 Difference]: Start difference. First operand 150715 states and 693289 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-06-05 07:19:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:33,574 INFO L93 Difference]: Finished difference Result 193192 states and 885923 transitions. [2021-06-05 07:19:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:19:33,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-06-05 07:19:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:34,701 INFO L225 Difference]: With dead ends: 193192 [2021-06-05 07:19:34,701 INFO L226 Difference]: Without dead ends: 193064 [2021-06-05 07:19:34,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:19:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193064 states. [2021-06-05 07:19:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193064 to 150929. [2021-06-05 07:19:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150929 states, 150928 states have (on average 4.599756175129864) internal successors, (694232), 150928 states have internal predecessors, (694232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150929 states to 150929 states and 694232 transitions. [2021-06-05 07:19:39,334 INFO L78 Accepts]: Start accepts. Automaton has 150929 states and 694232 transitions. Word has length 25 [2021-06-05 07:19:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:39,334 INFO L482 AbstractCegarLoop]: Abstraction has 150929 states and 694232 transitions. [2021-06-05 07:19:39,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-06-05 07:19:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 150929 states and 694232 transitions. [2021-06-05 07:19:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:19:40,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:40,145 INFO L521 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] [2021-06-05 07:19:40,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 07:19:40,361 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash 919442638, now seen corresponding path program 8 times [2021-06-05 07:19:40,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:40,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314304179] [2021-06-05 07:19:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:40,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314304179] [2021-06-05 07:19:40,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314304179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216886854] [2021-06-05 07:19:40,406 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:40,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:19:40,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:19:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:40,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216886854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:40,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:40,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:19:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320668285] [2021-06-05 07:19:40,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:19:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:19:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:19:40,521 INFO L87 Difference]: Start difference. First operand 150929 states and 694232 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 07:19:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:41,650 INFO L93 Difference]: Finished difference Result 156612 states and 717259 transitions. [2021-06-05 07:19:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:19:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 25 [2021-06-05 07:19:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:42,918 INFO L225 Difference]: With dead ends: 156612 [2021-06-05 07:19:42,918 INFO L226 Difference]: Without dead ends: 156525 [2021-06-05 07:19:42,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:19:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156525 states. [2021-06-05 07:19:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156525 to 152518. [2021-06-05 07:19:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152518 states, 152517 states have (on average 4.600287181101123) internal successors, (701622), 152517 states have internal predecessors, (701622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152518 states to 152518 states and 701622 transitions. [2021-06-05 07:19:47,497 INFO L78 Accepts]: Start accepts. Automaton has 152518 states and 701622 transitions. Word has length 25 [2021-06-05 07:19:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:47,497 INFO L482 AbstractCegarLoop]: Abstraction has 152518 states and 701622 transitions. [2021-06-05 07:19:47,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 07:19:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 152518 states and 701622 transitions. [2021-06-05 07:19:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:19:47,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:47,817 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:48,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:48,032 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:48,033 INFO L82 PathProgramCache]: Analyzing trace with hash 920853582, now seen corresponding path program 4 times [2021-06-05 07:19:48,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:48,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631531872] [2021-06-05 07:19:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:48,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:48,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631531872] [2021-06-05 07:19:48,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631531872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:48,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922069705] [2021-06-05 07:19:48,062 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:48,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:19:48,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:19:48,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922069705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:48,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:48,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:19:48,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665045112] [2021-06-05 07:19:48,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:19:48,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:48,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:19:48,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:19:48,136 INFO L87 Difference]: Start difference. First operand 152518 states and 701622 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:49,688 INFO L93 Difference]: Finished difference Result 156333 states and 716897 transitions. [2021-06-05 07:19:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:19:49,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:19:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:50,271 INFO L225 Difference]: With dead ends: 156333 [2021-06-05 07:19:50,272 INFO L226 Difference]: Without dead ends: 156315 [2021-06-05 07:19:50,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:19:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156315 states. [2021-06-05 07:19:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156315 to 152720. [2021-06-05 07:19:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152720 states, 152719 states have (on average 4.600062860547803) internal successors, (702517), 152719 states have internal predecessors, (702517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152720 states to 152720 states and 702517 transitions. [2021-06-05 07:19:55,155 INFO L78 Accepts]: Start accepts. Automaton has 152720 states and 702517 transitions. Word has length 25 [2021-06-05 07:19:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:55,155 INFO L482 AbstractCegarLoop]: Abstraction has 152720 states and 702517 transitions. [2021-06-05 07:19:55,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 152720 states and 702517 transitions. [2021-06-05 07:19:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:19:55,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:55,522 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:55,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 07:19:55,722 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1371587662, now seen corresponding path program 5 times [2021-06-05 07:19:55,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:55,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031966535] [2021-06-05 07:19:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:55,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:55,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031966535] [2021-06-05 07:19:55,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031966535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:55,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332783165] [2021-06-05 07:19:55,749 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:55,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:19:55,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:55,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:19:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:55,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332783165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:55,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:55,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:19:55,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643490017] [2021-06-05 07:19:55,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:19:55,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:55,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:19:55,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:19:55,824 INFO L87 Difference]: Start difference. First operand 152720 states and 702517 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-06-05 07:19:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:57,434 INFO L93 Difference]: Finished difference Result 161541 states and 737182 transitions. [2021-06-05 07:19:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:19:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 25 [2021-06-05 07:19:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:58,016 INFO L225 Difference]: With dead ends: 161541 [2021-06-05 07:19:58,016 INFO L226 Difference]: Without dead ends: 161541 [2021-06-05 07:19:58,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:19:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161541 states. [2021-06-05 07:20:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161541 to 152520. [2021-06-05 07:20:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152520 states, 152519 states have (on average 4.598823753106171) internal successors, (701408), 152519 states have internal predecessors, (701408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152520 states to 152520 states and 701408 transitions. [2021-06-05 07:20:02,342 INFO L78 Accepts]: Start accepts. Automaton has 152520 states and 701408 transitions. Word has length 25 [2021-06-05 07:20:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:20:02,342 INFO L482 AbstractCegarLoop]: Abstraction has 152520 states and 701408 transitions. [2021-06-05 07:20:02,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-06-05 07:20:02,343 INFO L276 IsEmpty]: Start isEmpty. Operand 152520 states and 701408 transitions. [2021-06-05 07:20:03,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:20:03,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:20:03,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:20:03,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:03,477 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:20:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:20:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1828705168, now seen corresponding path program 6 times [2021-06-05 07:20:03,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:20:03,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384423139] [2021-06-05 07:20:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:20:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:20:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:03,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:20:03,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384423139] [2021-06-05 07:20:03,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384423139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:03,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906691669] [2021-06-05 07:20:03,505 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:20:03,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:20:03,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:20:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:20:03,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:03,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906691669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:03,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:20:03,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:20:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224257001] [2021-06-05 07:20:03,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:20:03,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:20:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:20:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:20:03,584 INFO L87 Difference]: Start difference. First operand 152520 states and 701408 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:05,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:20:05,144 INFO L93 Difference]: Finished difference Result 156029 states and 715406 transitions. [2021-06-05 07:20:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:20:05,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-05 07:20:05,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:20:05,719 INFO L225 Difference]: With dead ends: 156029 [2021-06-05 07:20:05,719 INFO L226 Difference]: Without dead ends: 156011 [2021-06-05 07:20:05,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:20:05,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156011 states. [2021-06-05 07:20:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156011 to 152534. [2021-06-05 07:20:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152534 states, 152533 states have (on average 4.598604892056145) internal successors, (701439), 152533 states have internal predecessors, (701439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152534 states to 152534 states and 701439 transitions. [2021-06-05 07:20:10,306 INFO L78 Accepts]: Start accepts. Automaton has 152534 states and 701439 transitions. Word has length 25 [2021-06-05 07:20:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:20:10,306 INFO L482 AbstractCegarLoop]: Abstraction has 152534 states and 701439 transitions. [2021-06-05 07:20:10,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 152534 states and 701439 transitions. [2021-06-05 07:20:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:20:10,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:20:10,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:20:10,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 07:20:10,821 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:20:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:20:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1290086910, now seen corresponding path program 7 times [2021-06-05 07:20:10,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:20:10,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329205056] [2021-06-05 07:20:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:20:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:20:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:10,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:20:10,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329205056] [2021-06-05 07:20:10,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329205056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:10,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166913446] [2021-06-05 07:20:10,852 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:20:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:20:10,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:20:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166913446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:10,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:20:10,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:20:10,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764522176] [2021-06-05 07:20:10,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:20:10,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:20:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:20:10,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:20:10,926 INFO L87 Difference]: Start difference. First operand 152534 states and 701439 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:20:12,714 INFO L93 Difference]: Finished difference Result 187205 states and 846532 transitions. [2021-06-05 07:20:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:20:12,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-05 07:20:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:20:13,846 INFO L225 Difference]: With dead ends: 187205 [2021-06-05 07:20:13,847 INFO L226 Difference]: Without dead ends: 187205 [2021-06-05 07:20:13,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:20:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187205 states. [2021-06-05 07:20:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187205 to 152752. [2021-06-05 07:20:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152752 states, 152751 states have (on average 4.597796413771432) internal successors, (702318), 152751 states have internal predecessors, (702318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152752 states to 152752 states and 702318 transitions. [2021-06-05 07:20:18,639 INFO L78 Accepts]: Start accepts. Automaton has 152752 states and 702318 transitions. Word has length 25 [2021-06-05 07:20:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:20:18,639 INFO L482 AbstractCegarLoop]: Abstraction has 152752 states and 702318 transitions. [2021-06-05 07:20:18,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 152752 states and 702318 transitions. [2021-06-05 07:20:18,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:20:18,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:20:18,972 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:20:19,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:19,173 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:20:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:20:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082106, now seen corresponding path program 8 times [2021-06-05 07:20:19,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:20:19,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892403012] [2021-06-05 07:20:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:20:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:20:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:19,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:20:19,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892403012] [2021-06-05 07:20:19,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892403012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:19,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330004264] [2021-06-05 07:20:19,221 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:20:19,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:20:19,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:20:19,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:20:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:19,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330004264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:19,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:20:19,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:20:19,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127310010] [2021-06-05 07:20:19,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:20:19,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:20:19,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:20:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:20:19,309 INFO L87 Difference]: Start difference. First operand 152752 states and 702318 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:20:20,883 INFO L93 Difference]: Finished difference Result 153348 states and 704507 transitions. [2021-06-05 07:20:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:20:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-05 07:20:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:20:21,460 INFO L225 Difference]: With dead ends: 153348 [2021-06-05 07:20:21,460 INFO L226 Difference]: Without dead ends: 153248 [2021-06-05 07:20:21,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:20:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153248 states. [2021-06-05 07:20:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153248 to 152808. [2021-06-05 07:20:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152808 states, 152807 states have (on average 4.597446452060442) internal successors, (702522), 152807 states have internal predecessors, (702522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152808 states to 152808 states and 702522 transitions. [2021-06-05 07:20:26,669 INFO L78 Accepts]: Start accepts. Automaton has 152808 states and 702522 transitions. Word has length 25 [2021-06-05 07:20:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:20:26,669 INFO L482 AbstractCegarLoop]: Abstraction has 152808 states and 702522 transitions. [2021-06-05 07:20:26,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 152808 states and 702522 transitions. [2021-06-05 07:20:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:20:27,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:20:27,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:20:27,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:27,262 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:20:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:20:27,262 INFO L82 PathProgramCache]: Analyzing trace with hash -656052858, now seen corresponding path program 9 times [2021-06-05 07:20:27,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:20:27,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155655402] [2021-06-05 07:20:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:20:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:20:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:27,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:20:27,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155655402] [2021-06-05 07:20:27,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155655402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999378659] [2021-06-05 07:20:27,312 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:20:27,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:20:27,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:20:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:20:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:27,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999378659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:27,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:20:27,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:20:27,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331574415] [2021-06-05 07:20:27,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:20:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:20:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:20:27,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:20:27,398 INFO L87 Difference]: Start difference. First operand 152808 states and 702522 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:29,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:20:29,617 INFO L93 Difference]: Finished difference Result 254992 states and 1153363 transitions. [2021-06-05 07:20:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:20:29,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:20:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:20:31,108 INFO L225 Difference]: With dead ends: 254992 [2021-06-05 07:20:31,108 INFO L226 Difference]: Without dead ends: 254992 [2021-06-05 07:20:31,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:20:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254992 states. [2021-06-05 07:20:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254992 to 167585. [2021-06-05 07:20:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167585 states, 167584 states have (on average 4.616341655527974) internal successors, (773625), 167584 states have internal predecessors, (773625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167585 states to 167585 states and 773625 transitions. [2021-06-05 07:20:37,228 INFO L78 Accepts]: Start accepts. Automaton has 167585 states and 773625 transitions. Word has length 25 [2021-06-05 07:20:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:20:37,228 INFO L482 AbstractCegarLoop]: Abstraction has 167585 states and 773625 transitions. [2021-06-05 07:20:37,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 167585 states and 773625 transitions. [2021-06-05 07:20:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:20:37,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:20:37,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:20:37,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:37,809 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:20:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:20:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1715216728, now seen corresponding path program 10 times [2021-06-05 07:20:37,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:20:37,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481304938] [2021-06-05 07:20:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:20:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:20:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:37,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:20:37,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481304938] [2021-06-05 07:20:37,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481304938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:37,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596422852] [2021-06-05 07:20:37,844 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:37,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:20:37,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:20:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:20:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:20:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:37,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596422852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:37,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:20:37,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:20:37,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246392424] [2021-06-05 07:20:37,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:20:37,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:20:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:20:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:20:37,930 INFO L87 Difference]: Start difference. First operand 167585 states and 773625 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:20:40,361 INFO L93 Difference]: Finished difference Result 216803 states and 978719 transitions. [2021-06-05 07:20:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:20:40,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-05 07:20:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:20:41,220 INFO L225 Difference]: With dead ends: 216803 [2021-06-05 07:20:41,220 INFO L226 Difference]: Without dead ends: 216803 [2021-06-05 07:20:41,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:20:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216803 states. [2021-06-05 07:20:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216803 to 169071. [2021-06-05 07:20:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169071 states, 169070 states have (on average 4.613083338262258) internal successors, (779934), 169070 states have internal predecessors, (779934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169071 states to 169071 states and 779934 transitions. [2021-06-05 07:20:46,945 INFO L78 Accepts]: Start accepts. Automaton has 169071 states and 779934 transitions. Word has length 25 [2021-06-05 07:20:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:20:46,945 INFO L482 AbstractCegarLoop]: Abstraction has 169071 states and 779934 transitions. [2021-06-05 07:20:46,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 169071 states and 779934 transitions. [2021-06-05 07:20:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:20:47,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:20:47,315 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:20:47,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:47,516 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:20:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:20:47,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1504675330, now seen corresponding path program 11 times [2021-06-05 07:20:47,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:20:47,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314109745] [2021-06-05 07:20:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:20:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:20:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:47,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:20:47,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314109745] [2021-06-05 07:20:47,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314109745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:47,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292764237] [2021-06-05 07:20:47,620 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:47,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:20:47,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:20:47,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:20:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:20:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:47,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292764237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:47,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:20:47,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 07:20:47,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317979342] [2021-06-05 07:20:47,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:20:47,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:20:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:20:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:20:47,771 INFO L87 Difference]: Start difference. First operand 169071 states and 779934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:20:49,512 INFO L93 Difference]: Finished difference Result 190564 states and 868690 transitions. [2021-06-05 07:20:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:20:49,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:20:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:20:50,620 INFO L225 Difference]: With dead ends: 190564 [2021-06-05 07:20:50,620 INFO L226 Difference]: Without dead ends: 190336 [2021-06-05 07:20:50,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:20:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190336 states. [2021-06-05 07:20:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190336 to 169413. [2021-06-05 07:20:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169413 states, 169412 states have (on average 4.612908176516422) internal successors, (781482), 169412 states have internal predecessors, (781482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169413 states to 169413 states and 781482 transitions. [2021-06-05 07:20:55,575 INFO L78 Accepts]: Start accepts. Automaton has 169413 states and 781482 transitions. Word has length 25 [2021-06-05 07:20:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:20:55,575 INFO L482 AbstractCegarLoop]: Abstraction has 169413 states and 781482 transitions. [2021-06-05 07:20:55,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:20:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 169413 states and 781482 transitions. [2021-06-05 07:20:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:20:56,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:20:56,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:20:56,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 07:20:56,765 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:20:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:20:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash -423308966, now seen corresponding path program 12 times [2021-06-05 07:20:56,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:20:56,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044557437] [2021-06-05 07:20:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:20:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:20:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:56,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:20:56,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044557437] [2021-06-05 07:20:56,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044557437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:56,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476423719] [2021-06-05 07:20:56,800 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:20:56,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:20:56,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:20:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:20:56,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:20:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:20:56,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476423719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:20:56,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:20:56,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:20:56,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148195975] [2021-06-05 07:20:56,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:20:56,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:20:56,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:20:56,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:20:56,906 INFO L87 Difference]: Start difference. First operand 169413 states and 781482 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-06-05 07:20:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:20:59,026 INFO L93 Difference]: Finished difference Result 262079 states and 1183330 transitions. [2021-06-05 07:20:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:20:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 25 [2021-06-05 07:20:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:21:00,495 INFO L225 Difference]: With dead ends: 262079 [2021-06-05 07:21:00,495 INFO L226 Difference]: Without dead ends: 262061 [2021-06-05 07:21:00,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:21:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262061 states. [2021-06-05 07:21:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262061 to 170992. [2021-06-05 07:21:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170992 states, 170991 states have (on average 4.612985478767889) internal successors, (788779), 170991 states have internal predecessors, (788779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170992 states to 170992 states and 788779 transitions. [2021-06-05 07:21:06,468 INFO L78 Accepts]: Start accepts. Automaton has 170992 states and 788779 transitions. Word has length 25 [2021-06-05 07:21:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:21:06,468 INFO L482 AbstractCegarLoop]: Abstraction has 170992 states and 788779 transitions. [2021-06-05 07:21:06,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-06-05 07:21:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 170992 states and 788779 transitions. [2021-06-05 07:21:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:21:06,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:21:06,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:21:07,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:21:07,048 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:21:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:21:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash -206280976, now seen corresponding path program 13 times [2021-06-05 07:21:07,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:21:07,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970132940] [2021-06-05 07:21:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:21:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:21:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:07,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:21:07,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970132940] [2021-06-05 07:21:07,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970132940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:07,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770913078] [2021-06-05 07:21:07,135 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:21:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:21:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:21:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:21:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:07,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770913078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:07,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:21:07,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:21:07,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917423240] [2021-06-05 07:21:07,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:21:07,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:21:07,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:21:07,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:21:07,273 INFO L87 Difference]: Start difference. First operand 170992 states and 788779 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:21:09,335 INFO L93 Difference]: Finished difference Result 223330 states and 1021133 transitions. [2021-06-05 07:21:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:21:09,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 25 [2021-06-05 07:21:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:21:11,298 INFO L225 Difference]: With dead ends: 223330 [2021-06-05 07:21:11,298 INFO L226 Difference]: Without dead ends: 223330 [2021-06-05 07:21:11,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:21:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223330 states. [2021-06-05 07:21:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223330 to 171112. [2021-06-05 07:21:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171112 states, 171111 states have (on average 4.612830268071603) internal successors, (789306), 171111 states have internal predecessors, (789306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171112 states to 171112 states and 789306 transitions. [2021-06-05 07:21:17,292 INFO L78 Accepts]: Start accepts. Automaton has 171112 states and 789306 transitions. Word has length 25 [2021-06-05 07:21:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:21:17,292 INFO L482 AbstractCegarLoop]: Abstraction has 171112 states and 789306 transitions. [2021-06-05 07:21:17,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 171112 states and 789306 transitions. [2021-06-05 07:21:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:21:17,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:21:17,689 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:21:17,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 07:21:17,889 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:21:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:21:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash 64907726, now seen corresponding path program 14 times [2021-06-05 07:21:17,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:21:17,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053917840] [2021-06-05 07:21:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:21:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:21:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:17,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:21:17,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053917840] [2021-06-05 07:21:17,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053917840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:17,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538789338] [2021-06-05 07:21:17,920 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:21:17,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:21:17,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:21:17,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:21:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:21:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:18,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538789338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:18,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:21:18,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:21:18,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496428698] [2021-06-05 07:21:18,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:21:18,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:21:18,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:21:18,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:21:18,008 INFO L87 Difference]: Start difference. First operand 171112 states and 789306 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:21:20,652 INFO L93 Difference]: Finished difference Result 271293 states and 1227721 transitions. [2021-06-05 07:21:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:21:20,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 25 [2021-06-05 07:21:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:21:21,760 INFO L225 Difference]: With dead ends: 271293 [2021-06-05 07:21:21,761 INFO L226 Difference]: Without dead ends: 271293 [2021-06-05 07:21:21,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:21:22,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271293 states. [2021-06-05 07:21:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271293 to 180348. [2021-06-05 07:21:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180348 states, 180347 states have (on average 4.606841256023111) internal successors, (830830), 180347 states have internal predecessors, (830830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180348 states to 180348 states and 830830 transitions. [2021-06-05 07:21:28,788 INFO L78 Accepts]: Start accepts. Automaton has 180348 states and 830830 transitions. Word has length 25 [2021-06-05 07:21:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:21:28,788 INFO L482 AbstractCegarLoop]: Abstraction has 180348 states and 830830 transitions. [2021-06-05 07:21:28,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 180348 states and 830830 transitions. [2021-06-05 07:21:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:21:29,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:21:29,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:21:29,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:21:29,417 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:21:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:21:29,417 INFO L82 PathProgramCache]: Analyzing trace with hash 115677808, now seen corresponding path program 15 times [2021-06-05 07:21:29,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:21:29,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565908450] [2021-06-05 07:21:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:21:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:21:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:29,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:21:29,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565908450] [2021-06-05 07:21:29,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565908450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:29,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064962125] [2021-06-05 07:21:29,455 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:21:29,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:21:29,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:21:29,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:21:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:21:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:29,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064962125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:29,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:21:29,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:21:29,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606927284] [2021-06-05 07:21:29,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:21:29,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:21:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:21:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:21:29,531 INFO L87 Difference]: Start difference. First operand 180348 states and 830830 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:21:31,509 INFO L93 Difference]: Finished difference Result 228294 states and 1029691 transitions. [2021-06-05 07:21:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:21:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 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 25 [2021-06-05 07:21:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:21:32,812 INFO L225 Difference]: With dead ends: 228294 [2021-06-05 07:21:32,813 INFO L226 Difference]: Without dead ends: 228294 [2021-06-05 07:21:32,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:21:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228294 states. [2021-06-05 07:21:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228294 to 181280. [2021-06-05 07:21:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181280 states, 181279 states have (on average 4.603886826383641) internal successors, (834588), 181279 states have internal predecessors, (834588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181280 states to 181280 states and 834588 transitions. [2021-06-05 07:21:38,850 INFO L78 Accepts]: Start accepts. Automaton has 181280 states and 834588 transitions. Word has length 25 [2021-06-05 07:21:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:21:38,851 INFO L482 AbstractCegarLoop]: Abstraction has 181280 states and 834588 transitions. [2021-06-05 07:21:38,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 181280 states and 834588 transitions. [2021-06-05 07:21:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:21:39,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:21:39,276 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:21:39,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 07:21:39,476 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:21:39,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:21:39,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1557868062, now seen corresponding path program 16 times [2021-06-05 07:21:39,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:21:39,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63265053] [2021-06-05 07:21:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:21:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:21:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:39,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:21:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63265053] [2021-06-05 07:21:39,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63265053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749233276] [2021-06-05 07:21:39,522 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:21:39,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:21:39,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:21:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:21:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:21:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:39,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749233276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:39,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:21:39,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:21:39,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190379641] [2021-06-05 07:21:39,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:21:39,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:21:39,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:21:39,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:21:39,622 INFO L87 Difference]: Start difference. First operand 181280 states and 834588 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-06-05 07:21:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:21:41,508 INFO L93 Difference]: Finished difference Result 206101 states and 938235 transitions. [2021-06-05 07:21:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:21:41,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 25 [2021-06-05 07:21:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:21:42,748 INFO L225 Difference]: With dead ends: 206101 [2021-06-05 07:21:42,749 INFO L226 Difference]: Without dead ends: 205937 [2021-06-05 07:21:42,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:21:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205937 states. [2021-06-05 07:21:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205937 to 181308. [2021-06-05 07:21:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603799081116559) internal successors, (834701), 181307 states have internal predecessors, (834701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834701 transitions. [2021-06-05 07:21:48,630 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834701 transitions. Word has length 25 [2021-06-05 07:21:48,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:21:48,630 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834701 transitions. [2021-06-05 07:21:48,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-06-05 07:21:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834701 transitions. [2021-06-05 07:21:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:21:49,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:21:49,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:21:49,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 07:21:49,245 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:21:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:21:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1245125948, now seen corresponding path program 17 times [2021-06-05 07:21:49,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:21:49,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819134706] [2021-06-05 07:21:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:21:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:21:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:49,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:21:49,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819134706] [2021-06-05 07:21:49,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819134706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:49,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459536062] [2021-06-05 07:21:49,283 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:21:49,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:21:49,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:21:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:21:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:21:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:21:49,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459536062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:21:49,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:21:49,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:21:49,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783327448] [2021-06-05 07:21:49,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:21:49,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:21:49,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:21:49,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:21:49,357 INFO L87 Difference]: Start difference. First operand 181308 states and 834701 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:21:51,036 INFO L93 Difference]: Finished difference Result 182017 states and 837141 transitions. [2021-06-05 07:21:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:21:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:21:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:21:51,723 INFO L225 Difference]: With dead ends: 182017 [2021-06-05 07:21:51,723 INFO L226 Difference]: Without dead ends: 181917 [2021-06-05 07:21:51,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:21:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181917 states. [2021-06-05 07:21:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181917 to 181308. [2021-06-05 07:21:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603650162431677) internal successors, (834674), 181307 states have internal predecessors, (834674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834674 transitions. [2021-06-05 07:21:57,164 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834674 transitions. Word has length 25 [2021-06-05 07:21:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:21:57,164 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834674 transitions. [2021-06-05 07:21:57,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834674 transitions. [2021-06-05 07:21:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:21:57,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:21:57,551 INFO L521 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] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forcibly destroying the process [2021-06-05 07:21:58,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 07:21:58,179 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:21:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:21:58,179 INFO L82 PathProgramCache]: Analyzing trace with hash -59787534, now seen corresponding path program 7 times [2021-06-05 07:21:58,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:21:58,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477817066] [2021-06-05 07:21:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:21:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:21:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:21:58,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:21:58,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477817066] [2021-06-05 07:21:58,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477817066] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:21:58,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:21:58,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 07:21:58,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400231001] [2021-06-05 07:21:58,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:21:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:21:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:21:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:21:58,192 INFO L87 Difference]: Start difference. First operand 181308 states and 834674 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:21:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:21:59,841 INFO L93 Difference]: Finished difference Result 198214 states and 888498 transitions. [2021-06-05 07:21:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:21:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:21:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:00,594 INFO L225 Difference]: With dead ends: 198214 [2021-06-05 07:22:00,594 INFO L226 Difference]: Without dead ends: 164346 [2021-06-05 07:22:00,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:22:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164346 states. [2021-06-05 07:22:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164346 to 125085. [2021-06-05 07:22:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125085 states, 125084 states have (on average 4.721331265389658) internal successors, (590563), 125084 states have internal predecessors, (590563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125085 states to 125085 states and 590563 transitions. [2021-06-05 07:22:04,771 INFO L78 Accepts]: Start accepts. Automaton has 125085 states and 590563 transitions. Word has length 25 [2021-06-05 07:22:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:04,771 INFO L482 AbstractCegarLoop]: Abstraction has 125085 states and 590563 transitions. [2021-06-05 07:22:04,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 125085 states and 590563 transitions. [2021-06-05 07:22:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:05,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:05,561 INFO L521 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] [2021-06-05 07:22:05,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-05 07:22:05,561 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:05,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1733798960, now seen corresponding path program 8 times [2021-06-05 07:22:05,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:05,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394632730] [2021-06-05 07:22:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:05,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:05,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394632730] [2021-06-05 07:22:05,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394632730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:05,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758632658] [2021-06-05 07:22:05,607 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:22:05,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:22:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:22:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:05,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758632658] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:22:05,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:22:05,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-06-05 07:22:05,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919741888] [2021-06-05 07:22:05,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:22:05,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:22:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:22:05,718 INFO L87 Difference]: Start difference. First operand 125085 states and 590563 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:06,536 INFO L93 Difference]: Finished difference Result 130126 states and 607352 transitions. [2021-06-05 07:22:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:22:06,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:07,003 INFO L225 Difference]: With dead ends: 130126 [2021-06-05 07:22:07,003 INFO L226 Difference]: Without dead ends: 127575 [2021-06-05 07:22:07,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:22:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127575 states. [2021-06-05 07:22:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127575 to 87700. [2021-06-05 07:22:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87700 states, 87699 states have (on average 4.690794649881982) internal successors, (411378), 87699 states have internal predecessors, (411378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87700 states to 87700 states and 411378 transitions. [2021-06-05 07:22:09,803 INFO L78 Accepts]: Start accepts. Automaton has 87700 states and 411378 transitions. Word has length 25 [2021-06-05 07:22:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:09,803 INFO L482 AbstractCegarLoop]: Abstraction has 87700 states and 411378 transitions. [2021-06-05 07:22:09,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 87700 states and 411378 transitions. [2021-06-05 07:22:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:10,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:10,379 INFO L521 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] [2021-06-05 07:22:10,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 07:22:10,579 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:10,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1193216718, now seen corresponding path program 9 times [2021-06-05 07:22:10,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:10,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004283532] [2021-06-05 07:22:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:10,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:10,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004283532] [2021-06-05 07:22:10,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004283532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:10,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98871091] [2021-06-05 07:22:10,612 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:10,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:22:10,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:10,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98871091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:10,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:10,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:10,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127173750] [2021-06-05 07:22:10,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:10,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:10,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:10,684 INFO L87 Difference]: Start difference. First operand 87700 states and 411378 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:11,280 INFO L93 Difference]: Finished difference Result 89555 states and 418507 transitions. [2021-06-05 07:22:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:11,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:11,579 INFO L225 Difference]: With dead ends: 89555 [2021-06-05 07:22:11,579 INFO L226 Difference]: Without dead ends: 89419 [2021-06-05 07:22:11,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89419 states. [2021-06-05 07:22:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89419 to 87693. [2021-06-05 07:22:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87693 states, 87692 states have (on average 4.691762076358162) internal successors, (411430), 87692 states have internal predecessors, (411430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87693 states to 87693 states and 411430 transitions. [2021-06-05 07:22:14,166 INFO L78 Accepts]: Start accepts. Automaton has 87693 states and 411430 transitions. Word has length 25 [2021-06-05 07:22:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:14,166 INFO L482 AbstractCegarLoop]: Abstraction has 87693 states and 411430 transitions. [2021-06-05 07:22:14,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 87693 states and 411430 transitions. [2021-06-05 07:22:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:14,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:14,356 INFO L521 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] [2021-06-05 07:22:14,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:14,556 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash -648382774, now seen corresponding path program 10 times [2021-06-05 07:22:14,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:14,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831615697] [2021-06-05 07:22:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:14,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831615697] [2021-06-05 07:22:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831615697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436509294] [2021-06-05 07:22:14,600 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:14,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:22:14,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:14,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:14,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:14,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436509294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:14,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:14,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166700791] [2021-06-05 07:22:14,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:14,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:14,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:14,667 INFO L87 Difference]: Start difference. First operand 87693 states and 411430 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:15,651 INFO L93 Difference]: Finished difference Result 89703 states and 419257 transitions. [2021-06-05 07:22:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:15,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:15,955 INFO L225 Difference]: With dead ends: 89703 [2021-06-05 07:22:15,955 INFO L226 Difference]: Without dead ends: 89567 [2021-06-05 07:22:15,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89567 states. [2021-06-05 07:22:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89567 to 87714. [2021-06-05 07:22:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87714 states, 87713 states have (on average 4.692006886094422) internal successors, (411550), 87713 states have internal predecessors, (411550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87714 states to 87714 states and 411550 transitions. [2021-06-05 07:22:18,444 INFO L78 Accepts]: Start accepts. Automaton has 87714 states and 411550 transitions. Word has length 25 [2021-06-05 07:22:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:18,444 INFO L482 AbstractCegarLoop]: Abstraction has 87714 states and 411550 transitions. [2021-06-05 07:22:18,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 87714 states and 411550 transitions. [2021-06-05 07:22:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:18,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:18,646 INFO L521 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] [2021-06-05 07:22:18,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:18,849 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash -961842550, now seen corresponding path program 11 times [2021-06-05 07:22:18,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:18,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858200214] [2021-06-05 07:22:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:18,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:18,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858200214] [2021-06-05 07:22:18,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858200214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:18,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854203764] [2021-06-05 07:22:18,903 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:18,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:22:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:18,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854203764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:18,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:18,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957755829] [2021-06-05 07:22:18,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:18,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:18,962 INFO L87 Difference]: Start difference. First operand 87714 states and 411550 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:19,558 INFO L93 Difference]: Finished difference Result 89056 states and 416830 transitions. [2021-06-05 07:22:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:19,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:20,292 INFO L225 Difference]: With dead ends: 89056 [2021-06-05 07:22:20,292 INFO L226 Difference]: Without dead ends: 88940 [2021-06-05 07:22:20,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88940 states. [2021-06-05 07:22:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88940 to 87736. [2021-06-05 07:22:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87736 states, 87735 states have (on average 4.692141106741893) internal successors, (411665), 87735 states have internal predecessors, (411665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87736 states to 87736 states and 411665 transitions. [2021-06-05 07:22:22,273 INFO L78 Accepts]: Start accepts. Automaton has 87736 states and 411665 transitions. Word has length 25 [2021-06-05 07:22:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:22,273 INFO L482 AbstractCegarLoop]: Abstraction has 87736 states and 411665 transitions. [2021-06-05 07:22:22,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 87736 states and 411665 transitions. [2021-06-05 07:22:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:22,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:22,464 INFO L521 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] [2021-06-05 07:22:22,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 07:22:22,665 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash 394898822, now seen corresponding path program 12 times [2021-06-05 07:22:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:22,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38080254] [2021-06-05 07:22:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:22,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:22,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38080254] [2021-06-05 07:22:22,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38080254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:22,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468771716] [2021-06-05 07:22:22,719 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:22,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:22:22,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:22,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:22,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:22,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468771716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:22,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:22,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:22,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817397214] [2021-06-05 07:22:22,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:22,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:22,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:22,801 INFO L87 Difference]: Start difference. First operand 87736 states and 411665 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:23,787 INFO L93 Difference]: Finished difference Result 88944 states and 416367 transitions. [2021-06-05 07:22:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:23,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:24,099 INFO L225 Difference]: With dead ends: 88944 [2021-06-05 07:22:24,099 INFO L226 Difference]: Without dead ends: 88848 [2021-06-05 07:22:24,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88848 states. [2021-06-05 07:22:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88848 to 87758. [2021-06-05 07:22:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87758 states, 87757 states have (on average 4.692412001321832) internal successors, (411792), 87757 states have internal predecessors, (411792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87758 states to 87758 states and 411792 transitions. [2021-06-05 07:22:26,657 INFO L78 Accepts]: Start accepts. Automaton has 87758 states and 411792 transitions. Word has length 25 [2021-06-05 07:22:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:26,657 INFO L482 AbstractCegarLoop]: Abstraction has 87758 states and 411792 transitions. [2021-06-05 07:22:26,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 87758 states and 411792 transitions. [2021-06-05 07:22:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:26,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:26,848 INFO L521 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] [2021-06-05 07:22:27,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 07:22:27,049 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash 267220118, now seen corresponding path program 13 times [2021-06-05 07:22:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:27,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854154626] [2021-06-05 07:22:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:27,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854154626] [2021-06-05 07:22:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854154626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389071248] [2021-06-05 07:22:27,100 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:27,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:27,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:27,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389071248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:27,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:27,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:27,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316345015] [2021-06-05 07:22:27,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:27,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:27,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:27,161 INFO L87 Difference]: Start difference. First operand 87758 states and 411792 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:27,768 INFO L93 Difference]: Finished difference Result 90259 states and 421196 transitions. [2021-06-05 07:22:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:28,495 INFO L225 Difference]: With dead ends: 90259 [2021-06-05 07:22:28,495 INFO L226 Difference]: Without dead ends: 90123 [2021-06-05 07:22:28,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90123 states. [2021-06-05 07:22:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90123 to 87809. [2021-06-05 07:22:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87809 states, 87808 states have (on average 4.692852587463557) internal successors, (412070), 87808 states have internal predecessors, (412070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87809 states to 87809 states and 412070 transitions. [2021-06-05 07:22:30,465 INFO L78 Accepts]: Start accepts. Automaton has 87809 states and 412070 transitions. Word has length 25 [2021-06-05 07:22:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:30,465 INFO L482 AbstractCegarLoop]: Abstraction has 87809 states and 412070 transitions. [2021-06-05 07:22:30,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 87809 states and 412070 transitions. [2021-06-05 07:22:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:30,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:30,651 INFO L521 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] [2021-06-05 07:22:30,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 07:22:30,852 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:30,852 INFO L82 PathProgramCache]: Analyzing trace with hash -46239658, now seen corresponding path program 14 times [2021-06-05 07:22:30,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:30,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525952061] [2021-06-05 07:22:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:30,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525952061] [2021-06-05 07:22:30,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525952061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473178988] [2021-06-05 07:22:30,921 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:30,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:22:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:30,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:31,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473178988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:31,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:31,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:31,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224028902] [2021-06-05 07:22:31,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:31,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:31,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:31,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:31,343 INFO L87 Difference]: Start difference. First operand 87809 states and 412070 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:31,997 INFO L93 Difference]: Finished difference Result 89754 states and 419470 transitions. [2021-06-05 07:22:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:31,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:32,300 INFO L225 Difference]: With dead ends: 89754 [2021-06-05 07:22:32,300 INFO L226 Difference]: Without dead ends: 89638 [2021-06-05 07:22:32,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89638 states. [2021-06-05 07:22:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89638 to 87839. [2021-06-05 07:22:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87839 states, 87838 states have (on average 4.693196566406339) internal successors, (412241), 87838 states have internal predecessors, (412241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87839 states to 87839 states and 412241 transitions. [2021-06-05 07:22:34,788 INFO L78 Accepts]: Start accepts. Automaton has 87839 states and 412241 transitions. Word has length 25 [2021-06-05 07:22:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:34,788 INFO L482 AbstractCegarLoop]: Abstraction has 87839 states and 412241 transitions. [2021-06-05 07:22:34,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 87839 states and 412241 transitions. [2021-06-05 07:22:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:34,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:34,972 INFO L521 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] [2021-06-05 07:22:35,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 07:22:35,172 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:35,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1310501714, now seen corresponding path program 15 times [2021-06-05 07:22:35,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:35,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342321913] [2021-06-05 07:22:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:35,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:35,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342321913] [2021-06-05 07:22:35,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342321913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:35,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785608267] [2021-06-05 07:22:35,235 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:35,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:22:35,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:35,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785608267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:35,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:35,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:35,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403729041] [2021-06-05 07:22:35,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:35,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:35,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:35,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:35,301 INFO L87 Difference]: Start difference. First operand 87839 states and 412241 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:36,320 INFO L93 Difference]: Finished difference Result 89966 states and 420506 transitions. [2021-06-05 07:22:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:36,633 INFO L225 Difference]: With dead ends: 89966 [2021-06-05 07:22:36,633 INFO L226 Difference]: Without dead ends: 89870 [2021-06-05 07:22:36,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89870 states. [2021-06-05 07:22:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89870 to 87873. [2021-06-05 07:22:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87873 states, 87872 states have (on average 4.6936453022578295) internal successors, (412440), 87872 states have internal predecessors, (412440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87873 states to 87873 states and 412440 transitions. [2021-06-05 07:22:39,124 INFO L78 Accepts]: Start accepts. Automaton has 87873 states and 412440 transitions. Word has length 25 [2021-06-05 07:22:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:39,125 INFO L482 AbstractCegarLoop]: Abstraction has 87873 states and 412440 transitions. [2021-06-05 07:22:39,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 87873 states and 412440 transitions. [2021-06-05 07:22:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:39,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:39,362 INFO L521 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] [2021-06-05 07:22:39,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 07:22:39,563 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:39,563 INFO L82 PathProgramCache]: Analyzing trace with hash 523034708, now seen corresponding path program 9 times [2021-06-05 07:22:39,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:39,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937769557] [2021-06-05 07:22:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:39,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937769557] [2021-06-05 07:22:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937769557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396791831] [2021-06-05 07:22:39,582 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:39,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:22:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:22:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:39,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396791831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:39,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:39,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 07:22:39,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954083373] [2021-06-05 07:22:39,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:22:39,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:22:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:22:39,642 INFO L87 Difference]: Start difference. First operand 87873 states and 412440 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:40,307 INFO L93 Difference]: Finished difference Result 97671 states and 457254 transitions. [2021-06-05 07:22:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:22:40,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:40,639 INFO L225 Difference]: With dead ends: 97671 [2021-06-05 07:22:40,639 INFO L226 Difference]: Without dead ends: 97564 [2021-06-05 07:22:40,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:22:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97564 states. [2021-06-05 07:22:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97564 to 96045. [2021-06-05 07:22:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96045 states, 96044 states have (on average 4.702969472325185) internal successors, (451692), 96044 states have internal predecessors, (451692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96045 states to 96045 states and 451692 transitions. [2021-06-05 07:22:43,250 INFO L78 Accepts]: Start accepts. Automaton has 96045 states and 451692 transitions. Word has length 25 [2021-06-05 07:22:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:43,251 INFO L482 AbstractCegarLoop]: Abstraction has 96045 states and 451692 transitions. [2021-06-05 07:22:43,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 96045 states and 451692 transitions. [2021-06-05 07:22:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:43,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:43,461 INFO L521 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] [2021-06-05 07:22:43,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:43,662 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash -857833266, now seen corresponding path program 16 times [2021-06-05 07:22:43,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:43,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340326153] [2021-06-05 07:22:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:43,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:43,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340326153] [2021-06-05 07:22:43,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340326153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:43,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297622031] [2021-06-05 07:22:43,721 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:43,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:22:43,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:43,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:43,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:44,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297622031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:44,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:44,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:44,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116830116] [2021-06-05 07:22:44,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:44,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:44,185 INFO L87 Difference]: Start difference. First operand 96045 states and 451692 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:44,880 INFO L93 Difference]: Finished difference Result 97830 states and 458461 transitions. [2021-06-05 07:22:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:45,213 INFO L225 Difference]: With dead ends: 97830 [2021-06-05 07:22:45,213 INFO L226 Difference]: Without dead ends: 97714 [2021-06-05 07:22:45,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:45,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97714 states. [2021-06-05 07:22:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97714 to 96069. [2021-06-05 07:22:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96069 states, 96068 states have (on average 4.703106133155681) internal successors, (451818), 96068 states have internal predecessors, (451818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96069 states to 96069 states and 451818 transitions. [2021-06-05 07:22:47,932 INFO L78 Accepts]: Start accepts. Automaton has 96069 states and 451818 transitions. Word has length 25 [2021-06-05 07:22:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:47,932 INFO L482 AbstractCegarLoop]: Abstraction has 96069 states and 451818 transitions. [2021-06-05 07:22:47,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 96069 states and 451818 transitions. [2021-06-05 07:22:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:48,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:48,155 INFO L521 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] [2021-06-05 07:22:48,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 07:22:48,369 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash 498908106, now seen corresponding path program 17 times [2021-06-05 07:22:48,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:48,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576928044] [2021-06-05 07:22:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:48,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576928044] [2021-06-05 07:22:48,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576928044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660423896] [2021-06-05 07:22:48,483 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:48,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:22:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:48,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660423896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:48,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:48,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:48,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935445297] [2021-06-05 07:22:48,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:48,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:48,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:48,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:48,542 INFO L87 Difference]: Start difference. First operand 96069 states and 451818 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:49,602 INFO L93 Difference]: Finished difference Result 98062 states and 459589 transitions. [2021-06-05 07:22:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:49,935 INFO L225 Difference]: With dead ends: 98062 [2021-06-05 07:22:49,935 INFO L226 Difference]: Without dead ends: 97966 [2021-06-05 07:22:49,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97966 states. [2021-06-05 07:22:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97966 to 96093. [2021-06-05 07:22:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96093 states, 96092 states have (on average 4.7034716729800605) internal successors, (451966), 96092 states have internal predecessors, (451966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96093 states to 96093 states and 451966 transitions. [2021-06-05 07:22:52,522 INFO L78 Accepts]: Start accepts. Automaton has 96093 states and 451966 transitions. Word has length 25 [2021-06-05 07:22:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:52,522 INFO L482 AbstractCegarLoop]: Abstraction has 96093 states and 451966 transitions. [2021-06-05 07:22:52,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 96093 states and 451966 transitions. [2021-06-05 07:22:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:52,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:52,740 INFO L521 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] [2021-06-05 07:22:52,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:52,941 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1202930538, now seen corresponding path program 18 times [2021-06-05 07:22:52,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:52,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019841538] [2021-06-05 07:22:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:52,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:52,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019841538] [2021-06-05 07:22:52,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019841538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:52,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791740210] [2021-06-05 07:22:52,985 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:53,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:22:53,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:53,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:22:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:22:53,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791740210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:53,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:53,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:22:53,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140864689] [2021-06-05 07:22:53,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:22:53,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:53,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:22:53,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:53,062 INFO L87 Difference]: Start difference. First operand 96093 states and 451966 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:54,114 INFO L93 Difference]: Finished difference Result 98621 states and 461688 transitions. [2021-06-05 07:22:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:22:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:54,492 INFO L225 Difference]: With dead ends: 98621 [2021-06-05 07:22:54,492 INFO L226 Difference]: Without dead ends: 98525 [2021-06-05 07:22:54,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:22:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98525 states. [2021-06-05 07:22:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98525 to 96141. [2021-06-05 07:22:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96141 states, 96140 states have (on average 4.70395256916996) internal successors, (452238), 96140 states have internal predecessors, (452238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96141 states to 96141 states and 452238 transitions. [2021-06-05 07:22:57,186 INFO L78 Accepts]: Start accepts. Automaton has 96141 states and 452238 transitions. Word has length 25 [2021-06-05 07:22:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:22:57,186 INFO L482 AbstractCegarLoop]: Abstraction has 96141 states and 452238 transitions. [2021-06-05 07:22:57,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 96141 states and 452238 transitions. [2021-06-05 07:22:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:22:57,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:22:57,395 INFO L521 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] [2021-06-05 07:22:57,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:57,595 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:22:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:22:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1894658838, now seen corresponding path program 10 times [2021-06-05 07:22:57,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:22:57,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048645696] [2021-06-05 07:22:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:22:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:22:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:22:57,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:22:57,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048645696] [2021-06-05 07:22:57,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048645696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:57,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31057867] [2021-06-05 07:22:57,615 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:22:57,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:22:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:22:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:22:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:22:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:22:57,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31057867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:22:57,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:22:57,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 07:22:57,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454653355] [2021-06-05 07:22:57,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:22:57,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:22:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:22:57,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:22:57,678 INFO L87 Difference]: Start difference. First operand 96141 states and 452238 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:22:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:22:58,895 INFO L93 Difference]: Finished difference Result 107267 states and 496764 transitions. [2021-06-05 07:22:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:22:58,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-05 07:22:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:22:59,310 INFO L225 Difference]: With dead ends: 107267 [2021-06-05 07:22:59,310 INFO L226 Difference]: Without dead ends: 107165 [2021-06-05 07:22:59,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:22:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107165 states. [2021-06-05 07:23:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107165 to 96163. [2021-06-05 07:23:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96163 states, 96162 states have (on average 4.703042781972089) internal successors, (452254), 96162 states have internal predecessors, (452254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96163 states to 96163 states and 452254 transitions. [2021-06-05 07:23:01,963 INFO L78 Accepts]: Start accepts. Automaton has 96163 states and 452254 transitions. Word has length 25 [2021-06-05 07:23:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:01,963 INFO L482 AbstractCegarLoop]: Abstraction has 96163 states and 452254 transitions. [2021-06-05 07:23:01,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 96163 states and 452254 transitions. [2021-06-05 07:23:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:02,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:02,167 INFO L521 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] [2021-06-05 07:23:02,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:02,369 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1370737230, now seen corresponding path program 11 times [2021-06-05 07:23:02,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:02,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202675219] [2021-06-05 07:23:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:02,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:02,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202675219] [2021-06-05 07:23:02,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202675219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:02,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290402557] [2021-06-05 07:23:02,388 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:02,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:23:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:23:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:02,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290402557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:02,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:02,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 07:23:02,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903253403] [2021-06-05 07:23:02,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:23:02,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:02,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:23:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:23:02,463 INFO L87 Difference]: Start difference. First operand 96163 states and 452254 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:03,610 INFO L93 Difference]: Finished difference Result 105665 states and 492345 transitions. [2021-06-05 07:23:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:23:03,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:23:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:04,000 INFO L225 Difference]: With dead ends: 105665 [2021-06-05 07:23:04,001 INFO L226 Difference]: Without dead ends: 105515 [2021-06-05 07:23:04,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:23:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105515 states. [2021-06-05 07:23:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105515 to 100600. [2021-06-05 07:23:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100600 states, 100599 states have (on average 4.695384645970636) internal successors, (472351), 100599 states have internal predecessors, (472351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100600 states to 100600 states and 472351 transitions. [2021-06-05 07:23:06,774 INFO L78 Accepts]: Start accepts. Automaton has 100600 states and 472351 transitions. Word has length 25 [2021-06-05 07:23:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:06,774 INFO L482 AbstractCegarLoop]: Abstraction has 100600 states and 472351 transitions. [2021-06-05 07:23:06,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 100600 states and 472351 transitions. [2021-06-05 07:23:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:06,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:06,991 INFO L521 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] [2021-06-05 07:23:07,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:07,192 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1313736820, now seen corresponding path program 12 times [2021-06-05 07:23:07,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:07,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623877806] [2021-06-05 07:23:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:07,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:07,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623877806] [2021-06-05 07:23:07,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623877806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:07,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468930068] [2021-06-05 07:23:07,213 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:07,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:23:07,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:07,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:23:07,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:07,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468930068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:07,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:07,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:23:07,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153537475] [2021-06-05 07:23:07,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:23:07,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:23:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:23:07,310 INFO L87 Difference]: Start difference. First operand 100600 states and 472351 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:08,392 INFO L93 Difference]: Finished difference Result 103952 states and 485481 transitions. [2021-06-05 07:23:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:23:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:23:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:08,780 INFO L225 Difference]: With dead ends: 103952 [2021-06-05 07:23:08,780 INFO L226 Difference]: Without dead ends: 103908 [2021-06-05 07:23:08,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:23:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103908 states. [2021-06-05 07:23:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103908 to 100692. [2021-06-05 07:23:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100692 states, 100691 states have (on average 4.694391752986861) internal successors, (472683), 100691 states have internal predecessors, (472683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100692 states to 100692 states and 472683 transitions. [2021-06-05 07:23:11,482 INFO L78 Accepts]: Start accepts. Automaton has 100692 states and 472683 transitions. Word has length 25 [2021-06-05 07:23:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:11,482 INFO L482 AbstractCegarLoop]: Abstraction has 100692 states and 472683 transitions. [2021-06-05 07:23:11,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 100692 states and 472683 transitions. [2021-06-05 07:23:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:11,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:11,694 INFO L521 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] [2021-06-05 07:23:11,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:11,895 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash 812194570, now seen corresponding path program 13 times [2021-06-05 07:23:11,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:11,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282615470] [2021-06-05 07:23:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:11,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282615470] [2021-06-05 07:23:11,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282615470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921295978] [2021-06-05 07:23:11,914 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:11,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:23:11,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:11,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921295978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:11,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:11,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 07:23:11,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573421501] [2021-06-05 07:23:11,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:23:11,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:11,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:23:11,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:23:11,998 INFO L87 Difference]: Start difference. First operand 100692 states and 472683 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:13,219 INFO L93 Difference]: Finished difference Result 122378 states and 564861 transitions. [2021-06-05 07:23:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:23:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:23:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:13,656 INFO L225 Difference]: With dead ends: 122378 [2021-06-05 07:23:13,656 INFO L226 Difference]: Without dead ends: 120769 [2021-06-05 07:23:13,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:23:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120769 states. [2021-06-05 07:23:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120769 to 103273. [2021-06-05 07:23:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103273 states, 103272 states have (on average 4.6974688202029595) internal successors, (485117), 103272 states have internal predecessors, (485117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103273 states to 103273 states and 485117 transitions. [2021-06-05 07:23:16,542 INFO L78 Accepts]: Start accepts. Automaton has 103273 states and 485117 transitions. Word has length 25 [2021-06-05 07:23:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:16,542 INFO L482 AbstractCegarLoop]: Abstraction has 103273 states and 485117 transitions. [2021-06-05 07:23:16,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 103273 states and 485117 transitions. [2021-06-05 07:23:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:16,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:16,772 INFO L521 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] [2021-06-05 07:23:16,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 07:23:16,973 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:16,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1682717532, now seen corresponding path program 14 times [2021-06-05 07:23:16,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:16,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484844014] [2021-06-05 07:23:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:17,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484844014] [2021-06-05 07:23:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484844014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919577386] [2021-06-05 07:23:17,002 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:17,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:23:17,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:17,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:23:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:17,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919577386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:17,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:17,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:23:17,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826044287] [2021-06-05 07:23:17,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:23:17,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:23:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:23:17,519 INFO L87 Difference]: Start difference. First operand 103273 states and 485117 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:18,284 INFO L93 Difference]: Finished difference Result 106739 states and 498675 transitions. [2021-06-05 07:23:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:23:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:18,679 INFO L225 Difference]: With dead ends: 106739 [2021-06-05 07:23:18,679 INFO L226 Difference]: Without dead ends: 106655 [2021-06-05 07:23:18,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:23:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106655 states. [2021-06-05 07:23:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106655 to 103317. [2021-06-05 07:23:21,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103317 states, 103316 states have (on average 4.696697510550157) internal successors, (485244), 103316 states have internal predecessors, (485244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103317 states to 103317 states and 485244 transitions. [2021-06-05 07:23:21,453 INFO L78 Accepts]: Start accepts. Automaton has 103317 states and 485244 transitions. Word has length 25 [2021-06-05 07:23:21,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:21,453 INFO L482 AbstractCegarLoop]: Abstraction has 103317 states and 485244 transitions. [2021-06-05 07:23:21,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 103317 states and 485244 transitions. [2021-06-05 07:23:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:22,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:22,118 INFO L521 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] [2021-06-05 07:23:22,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 07:23:22,333 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1176441750, now seen corresponding path program 7 times [2021-06-05 07:23:22,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:22,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828572567] [2021-06-05 07:23:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:22,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:22,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828572567] [2021-06-05 07:23:22,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828572567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:22,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041815650] [2021-06-05 07:23:22,365 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:22,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:23:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:22,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041815650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:22,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:22,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:23:22,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537434295] [2021-06-05 07:23:22,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:23:22,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:22,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:23:22,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:22,424 INFO L87 Difference]: Start difference. First operand 103317 states and 485244 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:23,127 INFO L93 Difference]: Finished difference Result 105638 states and 494245 transitions. [2021-06-05 07:23:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:23:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:23,510 INFO L225 Difference]: With dead ends: 105638 [2021-06-05 07:23:23,510 INFO L226 Difference]: Without dead ends: 105538 [2021-06-05 07:23:23,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:23,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105538 states. [2021-06-05 07:23:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105538 to 103392. [2021-06-05 07:23:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103392 states, 103391 states have (on average 4.696830478474916) internal successors, (485610), 103391 states have internal predecessors, (485610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103392 states to 103392 states and 485610 transitions. [2021-06-05 07:23:26,344 INFO L78 Accepts]: Start accepts. Automaton has 103392 states and 485610 transitions. Word has length 25 [2021-06-05 07:23:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:26,344 INFO L482 AbstractCegarLoop]: Abstraction has 103392 states and 485610 transitions. [2021-06-05 07:23:26,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 103392 states and 485610 transitions. [2021-06-05 07:23:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:26,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:26,571 INFO L521 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] [2021-06-05 07:23:26,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 07:23:26,773 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1470680270, now seen corresponding path program 8 times [2021-06-05 07:23:26,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:26,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76060788] [2021-06-05 07:23:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:27,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:27,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76060788] [2021-06-05 07:23:27,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76060788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:27,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693102808] [2021-06-05 07:23:27,231 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:27,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:23:27,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:23:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:27,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693102808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:27,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:27,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:23:27,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659491705] [2021-06-05 07:23:27,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:23:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:23:27,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:27,398 INFO L87 Difference]: Start difference. First operand 103392 states and 485610 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:28,081 INFO L93 Difference]: Finished difference Result 105993 states and 495944 transitions. [2021-06-05 07:23:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:23:28,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:28,468 INFO L225 Difference]: With dead ends: 105993 [2021-06-05 07:23:28,468 INFO L226 Difference]: Without dead ends: 105893 [2021-06-05 07:23:28,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105893 states. [2021-06-05 07:23:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105893 to 103439. [2021-06-05 07:23:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103439 states, 103438 states have (on average 4.69710357895551) internal successors, (485859), 103438 states have internal predecessors, (485859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103439 states to 103439 states and 485859 transitions. [2021-06-05 07:23:31,309 INFO L78 Accepts]: Start accepts. Automaton has 103439 states and 485859 transitions. Word has length 25 [2021-06-05 07:23:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:31,309 INFO L482 AbstractCegarLoop]: Abstraction has 103439 states and 485859 transitions. [2021-06-05 07:23:31,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 103439 states and 485859 transitions. [2021-06-05 07:23:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:31,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:31,529 INFO L521 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] [2021-06-05 07:23:31,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 07:23:31,730 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1996714358, now seen corresponding path program 9 times [2021-06-05 07:23:31,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:31,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527911205] [2021-06-05 07:23:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:32,142 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 07:23:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:23:32,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:32,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527911205] [2021-06-05 07:23:32,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527911205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:32,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346650312] [2021-06-05 07:23:32,182 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:32,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:23:32,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:23:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:23:32,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346650312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:32,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:32,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:23:32,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083683509] [2021-06-05 07:23:32,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:23:32,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:32,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:23:32,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:32,292 INFO L87 Difference]: Start difference. First operand 103439 states and 485859 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:33,484 INFO L93 Difference]: Finished difference Result 104315 states and 489264 transitions. [2021-06-05 07:23:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:23:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:34,011 INFO L225 Difference]: With dead ends: 104315 [2021-06-05 07:23:34,011 INFO L226 Difference]: Without dead ends: 104239 [2021-06-05 07:23:34,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104239 states. [2021-06-05 07:23:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104239 to 103480. [2021-06-05 07:23:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103480 states, 103479 states have (on average 4.696981996347085) internal successors, (486039), 103479 states have internal predecessors, (486039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103480 states to 103480 states and 486039 transitions. [2021-06-05 07:23:36,899 INFO L78 Accepts]: Start accepts. Automaton has 103480 states and 486039 transitions. Word has length 25 [2021-06-05 07:23:36,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:36,899 INFO L482 AbstractCegarLoop]: Abstraction has 103480 states and 486039 transitions. [2021-06-05 07:23:36,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 103480 states and 486039 transitions. [2021-06-05 07:23:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:37,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:37,126 INFO L521 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] [2021-06-05 07:23:37,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 07:23:37,327 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:37,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash -247614478, now seen corresponding path program 10 times [2021-06-05 07:23:37,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:37,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714795748] [2021-06-05 07:23:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:23:37,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:37,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714795748] [2021-06-05 07:23:37,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714795748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:37,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822917024] [2021-06-05 07:23:37,382 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:37,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:23:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:23:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:23:37,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822917024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:37,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:37,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:23:37,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55686318] [2021-06-05 07:23:37,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:23:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:23:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:37,448 INFO L87 Difference]: Start difference. First operand 103480 states and 486039 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:38,612 INFO L93 Difference]: Finished difference Result 104856 states and 491459 transitions. [2021-06-05 07:23:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:23:38,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:38,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:38,975 INFO L225 Difference]: With dead ends: 104856 [2021-06-05 07:23:38,976 INFO L226 Difference]: Without dead ends: 104768 [2021-06-05 07:23:38,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104768 states. [2021-06-05 07:23:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104768 to 103498. [2021-06-05 07:23:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103498 states, 103497 states have (on average 4.697083007236925) internal successors, (486134), 103497 states have internal predecessors, (486134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103498 states to 103498 states and 486134 transitions. [2021-06-05 07:23:41,727 INFO L78 Accepts]: Start accepts. Automaton has 103498 states and 486134 transitions. Word has length 25 [2021-06-05 07:23:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:41,727 INFO L482 AbstractCegarLoop]: Abstraction has 103498 states and 486134 transitions. [2021-06-05 07:23:41,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 103498 states and 486134 transitions. [2021-06-05 07:23:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:41,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:41,957 INFO L521 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] [2021-06-05 07:23:42,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:42,157 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1683892410, now seen corresponding path program 11 times [2021-06-05 07:23:42,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:42,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93025032] [2021-06-05 07:23:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:42,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:42,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93025032] [2021-06-05 07:23:42,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93025032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:42,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402438588] [2021-06-05 07:23:42,192 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:42,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:23:42,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:42,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:23:42,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:42,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402438588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:42,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:42,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:23:42,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270670935] [2021-06-05 07:23:42,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:23:42,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:23:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:42,243 INFO L87 Difference]: Start difference. First operand 103498 states and 486134 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:43,354 INFO L93 Difference]: Finished difference Result 105284 states and 493087 transitions. [2021-06-05 07:23:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:23:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:43,734 INFO L225 Difference]: With dead ends: 105284 [2021-06-05 07:23:43,734 INFO L226 Difference]: Without dead ends: 105184 [2021-06-05 07:23:43,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105184 states. [2021-06-05 07:23:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105184 to 103515. [2021-06-05 07:23:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103515 states, 103514 states have (on average 4.69741291033097) internal successors, (486248), 103514 states have internal predecessors, (486248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103515 states to 103515 states and 486248 transitions. [2021-06-05 07:23:46,492 INFO L78 Accepts]: Start accepts. Automaton has 103515 states and 486248 transitions. Word has length 25 [2021-06-05 07:23:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:46,492 INFO L482 AbstractCegarLoop]: Abstraction has 103515 states and 486248 transitions. [2021-06-05 07:23:46,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 103515 states and 486248 transitions. [2021-06-05 07:23:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:46,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:46,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:23:46,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:46,926 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:46,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:46,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1492192234, now seen corresponding path program 18 times [2021-06-05 07:23:46,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:46,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951104944] [2021-06-05 07:23:46,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:46,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951104944] [2021-06-05 07:23:46,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951104944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829100428] [2021-06-05 07:23:46,959 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:46,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:23:46,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:46,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:23:46,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:23:47,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829100428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:47,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:47,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 07:23:47,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599105671] [2021-06-05 07:23:47,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:23:47,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:47,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:23:47,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:23:47,029 INFO L87 Difference]: Start difference. First operand 103515 states and 486248 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:48,292 INFO L93 Difference]: Finished difference Result 118688 states and 551898 transitions. [2021-06-05 07:23:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:23:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:48,725 INFO L225 Difference]: With dead ends: 118688 [2021-06-05 07:23:48,725 INFO L226 Difference]: Without dead ends: 118688 [2021-06-05 07:23:48,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:23:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118688 states. [2021-06-05 07:23:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118688 to 105619. [2021-06-05 07:23:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105619 states, 105618 states have (on average 4.697987085534662) internal successors, (496192), 105618 states have internal predecessors, (496192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105619 states to 105619 states and 496192 transitions. [2021-06-05 07:23:51,677 INFO L78 Accepts]: Start accepts. Automaton has 105619 states and 496192 transitions. Word has length 25 [2021-06-05 07:23:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:51,677 INFO L482 AbstractCegarLoop]: Abstraction has 105619 states and 496192 transitions. [2021-06-05 07:23:51,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 105619 states and 496192 transitions. [2021-06-05 07:23:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:51,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:51,887 INFO L521 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] [2021-06-05 07:23:52,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:52,089 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1850358678, now seen corresponding path program 12 times [2021-06-05 07:23:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:52,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958815997] [2021-06-05 07:23:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:23:52,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958815997] [2021-06-05 07:23:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958815997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408581397] [2021-06-05 07:23:52,129 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:52,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:23:52,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:23:52,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:23:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:23:52,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408581397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:52,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:52,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:23:52,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622104087] [2021-06-05 07:23:52,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:23:52,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:52,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:23:52,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:52,207 INFO L87 Difference]: Start difference. First operand 105619 states and 496192 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:53,259 INFO L93 Difference]: Finished difference Result 108208 states and 506403 transitions. [2021-06-05 07:23:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:23:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:53,665 INFO L225 Difference]: With dead ends: 108208 [2021-06-05 07:23:53,665 INFO L226 Difference]: Without dead ends: 108108 [2021-06-05 07:23:53,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108108 states. [2021-06-05 07:23:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108108 to 105643. [2021-06-05 07:23:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105643 states, 105642 states have (on average 4.698443800761061) internal successors, (496353), 105642 states have internal predecessors, (496353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105643 states to 105643 states and 496353 transitions. [2021-06-05 07:23:56,432 INFO L78 Accepts]: Start accepts. Automaton has 105643 states and 496353 transitions. Word has length 25 [2021-06-05 07:23:56,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:23:56,432 INFO L482 AbstractCegarLoop]: Abstraction has 105643 states and 496353 transitions. [2021-06-05 07:23:56,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:56,432 INFO L276 IsEmpty]: Start isEmpty. Operand 105643 states and 496353 transitions. [2021-06-05 07:23:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:23:56,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:23:56,655 INFO L521 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] [2021-06-05 07:23:56,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:56,855 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:23:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:23:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035950, now seen corresponding path program 13 times [2021-06-05 07:23:56,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:23:56,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261873509] [2021-06-05 07:23:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:23:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:23:56,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:23:56,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261873509] [2021-06-05 07:23:56,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261873509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:56,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565448228] [2021-06-05 07:23:56,913 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:23:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:23:56,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:23:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:23:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:23:56,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565448228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:23:56,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:23:56,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:23:56,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807314995] [2021-06-05 07:23:56,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:23:56,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:23:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:23:56,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:56,976 INFO L87 Difference]: Start difference. First operand 105643 states and 496353 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:23:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:23:58,049 INFO L93 Difference]: Finished difference Result 108139 states and 506170 transitions. [2021-06-05 07:23:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:23:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:23:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:23:58,453 INFO L225 Difference]: With dead ends: 108139 [2021-06-05 07:23:58,453 INFO L226 Difference]: Without dead ends: 108063 [2021-06-05 07:23:58,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:23:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108063 states. [2021-06-05 07:24:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108063 to 105670. [2021-06-05 07:24:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105670 states, 105669 states have (on average 4.69866280555319) internal successors, (496503), 105669 states have internal predecessors, (496503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105670 states to 105670 states and 496503 transitions. [2021-06-05 07:24:01,236 INFO L78 Accepts]: Start accepts. Automaton has 105670 states and 496503 transitions. Word has length 25 [2021-06-05 07:24:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:01,236 INFO L482 AbstractCegarLoop]: Abstraction has 105670 states and 496503 transitions. [2021-06-05 07:24:01,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 105670 states and 496503 transitions. [2021-06-05 07:24:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:01,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:01,460 INFO L521 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] [2021-06-05 07:24:01,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:01,661 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 132063930, now seen corresponding path program 14 times [2021-06-05 07:24:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:01,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965428140] [2021-06-05 07:24:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:01,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:01,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965428140] [2021-06-05 07:24:01,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965428140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:01,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236487086] [2021-06-05 07:24:01,722 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:01,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:24:01,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:24:01,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:24:01,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:01,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236487086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:01,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:01,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:24:01,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903717222] [2021-06-05 07:24:01,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:24:01,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:01,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:24:01,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:01,783 INFO L87 Difference]: Start difference. First operand 105670 states and 496503 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:02,915 INFO L93 Difference]: Finished difference Result 107419 states and 503279 transitions. [2021-06-05 07:24:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:24:02,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:03,304 INFO L225 Difference]: With dead ends: 107419 [2021-06-05 07:24:03,304 INFO L226 Difference]: Without dead ends: 107331 [2021-06-05 07:24:03,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107331 states. [2021-06-05 07:24:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107331 to 105677. [2021-06-05 07:24:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105677 states, 105676 states have (on average 4.698938264128089) internal successors, (496565), 105676 states have internal predecessors, (496565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105677 states to 105677 states and 496565 transitions. [2021-06-05 07:24:06,116 INFO L78 Accepts]: Start accepts. Automaton has 105677 states and 496565 transitions. Word has length 25 [2021-06-05 07:24:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:06,116 INFO L482 AbstractCegarLoop]: Abstraction has 105677 states and 496565 transitions. [2021-06-05 07:24:06,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 105677 states and 496565 transitions. [2021-06-05 07:24:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:06,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:06,341 INFO L521 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] [2021-06-05 07:24:06,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 07:24:06,541 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1826075754, now seen corresponding path program 15 times [2021-06-05 07:24:06,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:06,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890071499] [2021-06-05 07:24:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:06,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:06,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890071499] [2021-06-05 07:24:06,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890071499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:06,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379236000] [2021-06-05 07:24:06,582 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:24:07,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:24:07,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:24:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:24:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379236000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:07,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:07,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:24:07,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8012158] [2021-06-05 07:24:07,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:24:07,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:07,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:24:07,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:07,080 INFO L87 Difference]: Start difference. First operand 105677 states and 496565 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:07,778 INFO L93 Difference]: Finished difference Result 108226 states and 506520 transitions. [2021-06-05 07:24:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:24:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:07,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:08,167 INFO L225 Difference]: With dead ends: 108226 [2021-06-05 07:24:08,167 INFO L226 Difference]: Without dead ends: 108150 [2021-06-05 07:24:08,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108150 states. [2021-06-05 07:24:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108150 to 105719. [2021-06-05 07:24:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105719 states, 105718 states have (on average 4.699351103880134) internal successors, (496806), 105718 states have internal predecessors, (496806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105719 states to 105719 states and 496806 transitions. [2021-06-05 07:24:10,932 INFO L78 Accepts]: Start accepts. Automaton has 105719 states and 496806 transitions. Word has length 25 [2021-06-05 07:24:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:10,932 INFO L482 AbstractCegarLoop]: Abstraction has 105719 states and 496806 transitions. [2021-06-05 07:24:10,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 105719 states and 496806 transitions. [2021-06-05 07:24:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:11,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:11,662 INFO L521 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] [2021-06-05 07:24:11,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 07:24:11,877 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159402, now seen corresponding path program 16 times [2021-06-05 07:24:11,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:11,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695268495] [2021-06-05 07:24:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:11,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:11,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695268495] [2021-06-05 07:24:11,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695268495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:11,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784566397] [2021-06-05 07:24:11,929 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:11,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:24:11,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:24:11,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:24:11,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:11,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784566397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:11,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:11,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:24:11,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540049644] [2021-06-05 07:24:11,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:24:11,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:24:11,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:11,990 INFO L87 Difference]: Start difference. First operand 105719 states and 496806 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:12,700 INFO L93 Difference]: Finished difference Result 107874 states and 505312 transitions. [2021-06-05 07:24:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:24:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:13,093 INFO L225 Difference]: With dead ends: 107874 [2021-06-05 07:24:13,093 INFO L226 Difference]: Without dead ends: 107798 [2021-06-05 07:24:13,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107798 states. [2021-06-05 07:24:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107798 to 105741. [2021-06-05 07:24:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105741 states, 105740 states have (on average 4.69966899943257) internal successors, (496943), 105740 states have internal predecessors, (496943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105741 states to 105741 states and 496943 transitions. [2021-06-05 07:24:15,885 INFO L78 Accepts]: Start accepts. Automaton has 105741 states and 496943 transitions. Word has length 25 [2021-06-05 07:24:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:15,885 INFO L482 AbstractCegarLoop]: Abstraction has 105741 states and 496943 transitions. [2021-06-05 07:24:15,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 105741 states and 496943 transitions. [2021-06-05 07:24:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:16,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:16,573 INFO L521 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] [2021-06-05 07:24:16,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:16,804 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1420708014, now seen corresponding path program 17 times [2021-06-05 07:24:16,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:16,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020068420] [2021-06-05 07:24:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:16,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:16,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020068420] [2021-06-05 07:24:16,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020068420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:16,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157930947] [2021-06-05 07:24:16,863 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:16,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:24:16,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:24:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:24:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:16,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157930947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:16,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:16,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:24:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797688071] [2021-06-05 07:24:16,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:24:16,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:16,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:24:16,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:16,933 INFO L87 Difference]: Start difference. First operand 105741 states and 496943 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:17,645 INFO L93 Difference]: Finished difference Result 107237 states and 502736 transitions. [2021-06-05 07:24:17,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:24:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:18,033 INFO L225 Difference]: With dead ends: 107237 [2021-06-05 07:24:18,033 INFO L226 Difference]: Without dead ends: 107149 [2021-06-05 07:24:18,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107149 states. [2021-06-05 07:24:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107149 to 105752. [2021-06-05 07:24:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105752 states, 105751 states have (on average 4.699946099800474) internal successors, (497024), 105751 states have internal predecessors, (497024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105752 states to 105752 states and 497024 transitions. [2021-06-05 07:24:21,189 INFO L78 Accepts]: Start accepts. Automaton has 105752 states and 497024 transitions. Word has length 25 [2021-06-05 07:24:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:21,189 INFO L482 AbstractCegarLoop]: Abstraction has 105752 states and 497024 transitions. [2021-06-05 07:24:21,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 105752 states and 497024 transitions. [2021-06-05 07:24:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:21,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:21,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:24:22,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 07:24:22,103 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:22,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1658453014, now seen corresponding path program 19 times [2021-06-05 07:24:22,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:22,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413050655] [2021-06-05 07:24:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:24:22,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413050655] [2021-06-05 07:24:22,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413050655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:22,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054933367] [2021-06-05 07:24:22,122 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:22,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:24:22,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:24:22,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054933367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:22,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:22,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 07:24:22,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836294927] [2021-06-05 07:24:22,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:24:22,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:22,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:24:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:24:22,210 INFO L87 Difference]: Start difference. First operand 105752 states and 497024 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-06-05 07:24:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:23,206 INFO L93 Difference]: Finished difference Result 148546 states and 685984 transitions. [2021-06-05 07:24:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:24:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 25 [2021-06-05 07:24:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:24,210 INFO L225 Difference]: With dead ends: 148546 [2021-06-05 07:24:24,211 INFO L226 Difference]: Without dead ends: 147281 [2021-06-05 07:24:24,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:24:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147281 states. [2021-06-05 07:24:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147281 to 117058. [2021-06-05 07:24:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117058 states, 117057 states have (on average 4.7037169925762665) internal successors, (550603), 117057 states have internal predecessors, (550603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117058 states to 117058 states and 550603 transitions. [2021-06-05 07:24:27,464 INFO L78 Accepts]: Start accepts. Automaton has 117058 states and 550603 transitions. Word has length 25 [2021-06-05 07:24:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:27,464 INFO L482 AbstractCegarLoop]: Abstraction has 117058 states and 550603 transitions. [2021-06-05 07:24:27,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-06-05 07:24:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 117058 states and 550603 transitions. [2021-06-05 07:24:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:27,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:27,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:24:27,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:27,919 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash 208727758, now seen corresponding path program 20 times [2021-06-05 07:24:27,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:27,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397944523] [2021-06-05 07:24:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:24:27,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:27,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397944523] [2021-06-05 07:24:27,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397944523] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:24:27,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:24:27,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:24:27,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498139571] [2021-06-05 07:24:27,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:24:27,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:24:27,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:24:27,938 INFO L87 Difference]: Start difference. First operand 117058 states and 550603 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:29,309 INFO L93 Difference]: Finished difference Result 128713 states and 600066 transitions. [2021-06-05 07:24:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:24:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:29,780 INFO L225 Difference]: With dead ends: 128713 [2021-06-05 07:24:29,781 INFO L226 Difference]: Without dead ends: 128713 [2021-06-05 07:24:29,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:24:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128713 states. [2021-06-05 07:24:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128713 to 117168. [2021-06-05 07:24:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117168 states, 117167 states have (on average 4.7038500601705255) internal successors, (551136), 117167 states have internal predecessors, (551136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117168 states to 117168 states and 551136 transitions. [2021-06-05 07:24:33,319 INFO L78 Accepts]: Start accepts. Automaton has 117168 states and 551136 transitions. Word has length 25 [2021-06-05 07:24:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:33,319 INFO L482 AbstractCegarLoop]: Abstraction has 117168 states and 551136 transitions. [2021-06-05 07:24:33,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 117168 states and 551136 transitions. [2021-06-05 07:24:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:33,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:33,605 INFO L521 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] [2021-06-05 07:24:33,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-05 07:24:33,605 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash 537875814, now seen corresponding path program 18 times [2021-06-05 07:24:33,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:33,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643341893] [2021-06-05 07:24:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:33,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:33,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643341893] [2021-06-05 07:24:33,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643341893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:33,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105511545] [2021-06-05 07:24:33,644 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:33,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:24:33,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:24:33,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:24:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105511545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:33,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:33,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:24:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866360613] [2021-06-05 07:24:33,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:24:33,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:24:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:33,706 INFO L87 Difference]: Start difference. First operand 117168 states and 551136 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:34,987 INFO L93 Difference]: Finished difference Result 119473 states and 560252 transitions. [2021-06-05 07:24:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:24:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:35,415 INFO L225 Difference]: With dead ends: 119473 [2021-06-05 07:24:35,415 INFO L226 Difference]: Without dead ends: 119373 [2021-06-05 07:24:35,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119373 states. [2021-06-05 07:24:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119373 to 117184. [2021-06-05 07:24:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117184 states, 117183 states have (on average 4.7040782366042855) internal successors, (551238), 117183 states have internal predecessors, (551238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117184 states to 117184 states and 551238 transitions. [2021-06-05 07:24:38,435 INFO L78 Accepts]: Start accepts. Automaton has 117184 states and 551238 transitions. Word has length 25 [2021-06-05 07:24:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:38,435 INFO L482 AbstractCegarLoop]: Abstraction has 117184 states and 551238 transitions. [2021-06-05 07:24:38,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 117184 states and 551238 transitions. [2021-06-05 07:24:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:38,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:38,691 INFO L521 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] [2021-06-05 07:24:38,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:38,895 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1365448482, now seen corresponding path program 19 times [2021-06-05 07:24:38,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:38,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742378630] [2021-06-05 07:24:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:38,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:38,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742378630] [2021-06-05 07:24:38,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742378630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:38,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101363277] [2021-06-05 07:24:38,945 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:38,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:24:38,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:39,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101363277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:39,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:39,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:24:39,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312862097] [2021-06-05 07:24:39,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:24:39,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:24:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:39,018 INFO L87 Difference]: Start difference. First operand 117184 states and 551238 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:40,218 INFO L93 Difference]: Finished difference Result 118219 states and 555230 transitions. [2021-06-05 07:24:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:24:40,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:40,647 INFO L225 Difference]: With dead ends: 118219 [2021-06-05 07:24:40,648 INFO L226 Difference]: Without dead ends: 118143 [2021-06-05 07:24:40,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118143 states. [2021-06-05 07:24:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118143 to 117194. [2021-06-05 07:24:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117194 states, 117193 states have (on average 4.7041034874096574) internal successors, (551288), 117193 states have internal predecessors, (551288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117194 states to 117194 states and 551288 transitions. [2021-06-05 07:24:43,562 INFO L78 Accepts]: Start accepts. Automaton has 117194 states and 551288 transitions. Word has length 25 [2021-06-05 07:24:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:43,562 INFO L482 AbstractCegarLoop]: Abstraction has 117194 states and 551288 transitions. [2021-06-05 07:24:43,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 117194 states and 551288 transitions. [2021-06-05 07:24:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:44,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:44,332 INFO L521 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] [2021-06-05 07:24:44,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 07:24:44,545 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:44,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:44,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1180418934, now seen corresponding path program 20 times [2021-06-05 07:24:44,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:44,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525206101] [2021-06-05 07:24:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:44,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:44,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525206101] [2021-06-05 07:24:44,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525206101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:44,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519367614] [2021-06-05 07:24:44,595 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:44,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:24:44,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:24:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:24:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:44,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519367614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:44,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:44,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:24:44,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941365848] [2021-06-05 07:24:44,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:24:44,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:24:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:44,678 INFO L87 Difference]: Start difference. First operand 117194 states and 551288 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:45,437 INFO L93 Difference]: Finished difference Result 118548 states and 556592 transitions. [2021-06-05 07:24:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:24:45,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:46,335 INFO L225 Difference]: With dead ends: 118548 [2021-06-05 07:24:46,336 INFO L226 Difference]: Without dead ends: 118460 [2021-06-05 07:24:46,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118460 states. [2021-06-05 07:24:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118460 to 117198. [2021-06-05 07:24:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117198 states, 117197 states have (on average 4.70423304350794) internal successors, (551322), 117197 states have internal predecessors, (551322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117198 states to 117198 states and 551322 transitions. [2021-06-05 07:24:49,351 INFO L78 Accepts]: Start accepts. Automaton has 117198 states and 551322 transitions. Word has length 25 [2021-06-05 07:24:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:49,351 INFO L482 AbstractCegarLoop]: Abstraction has 117198 states and 551322 transitions. [2021-06-05 07:24:49,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:49,351 INFO L276 IsEmpty]: Start isEmpty. Operand 117198 states and 551322 transitions. [2021-06-05 07:24:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:24:49,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:49,612 INFO L521 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] [2021-06-05 07:24:49,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:49,812 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash 751087954, now seen corresponding path program 21 times [2021-06-05 07:24:49,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:49,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132219957] [2021-06-05 07:24:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:49,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:49,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132219957] [2021-06-05 07:24:49,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132219957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:49,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712025300] [2021-06-05 07:24:49,844 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:49,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:24:49,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:24:49,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:24:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:24:49,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712025300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:49,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:49,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:24:49,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660222000] [2021-06-05 07:24:49,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:24:49,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:24:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:49,897 INFO L87 Difference]: Start difference. First operand 117198 states and 551322 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:51,077 INFO L93 Difference]: Finished difference Result 118753 states and 557336 transitions. [2021-06-05 07:24:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:24:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-05 07:24:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:51,523 INFO L225 Difference]: With dead ends: 118753 [2021-06-05 07:24:51,523 INFO L226 Difference]: Without dead ends: 118653 [2021-06-05 07:24:51,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:24:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118653 states. [2021-06-05 07:24:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118653 to 117200. [2021-06-05 07:24:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117200 states, 117199 states have (on average 4.704528195633069) internal successors, (551366), 117199 states have internal predecessors, (551366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117200 states to 117200 states and 551366 transitions. [2021-06-05 07:24:54,480 INFO L78 Accepts]: Start accepts. Automaton has 117200 states and 551366 transitions. Word has length 25 [2021-06-05 07:24:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:24:54,480 INFO L482 AbstractCegarLoop]: Abstraction has 117200 states and 551366 transitions. [2021-06-05 07:24:54,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 117200 states and 551366 transitions. [2021-06-05 07:24:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:24:54,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:24:54,755 INFO L521 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] [2021-06-05 07:24:54,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:54,964 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:24:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:24:54,965 INFO L82 PathProgramCache]: Analyzing trace with hash -166258994, now seen corresponding path program 19 times [2021-06-05 07:24:54,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:24:54,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130745484] [2021-06-05 07:24:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:24:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:24:54,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:24:54,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130745484] [2021-06-05 07:24:54,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130745484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:54,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460198731] [2021-06-05 07:24:54,989 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:24:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:24:55,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:24:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:24:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:24:55,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460198731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:24:55,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:24:55,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:24:55,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316337865] [2021-06-05 07:24:55,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:24:55,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:24:55,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:24:55,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:24:55,542 INFO L87 Difference]: Start difference. First operand 117200 states and 551366 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:24:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:24:56,572 INFO L93 Difference]: Finished difference Result 147548 states and 688527 transitions. [2021-06-05 07:24:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:24:56,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:24:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:24:57,534 INFO L225 Difference]: With dead ends: 147548 [2021-06-05 07:24:57,535 INFO L226 Difference]: Without dead ends: 146423 [2021-06-05 07:24:57,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:24:57,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146423 states. [2021-06-05 07:25:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146423 to 133054. [2021-06-05 07:25:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133054 states, 133053 states have (on average 4.703276138080314) internal successors, (625785), 133053 states have internal predecessors, (625785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133054 states to 133054 states and 625785 transitions. [2021-06-05 07:25:01,543 INFO L78 Accepts]: Start accepts. Automaton has 133054 states and 625785 transitions. Word has length 27 [2021-06-05 07:25:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:01,543 INFO L482 AbstractCegarLoop]: Abstraction has 133054 states and 625785 transitions. [2021-06-05 07:25:01,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 133054 states and 625785 transitions. [2021-06-05 07:25:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:02,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:02,310 INFO L521 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] [2021-06-05 07:25:02,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 07:25:02,527 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash 932861774, now seen corresponding path program 21 times [2021-06-05 07:25:02,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:02,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178287623] [2021-06-05 07:25:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:02,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:02,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178287623] [2021-06-05 07:25:02,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178287623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:02,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115691602] [2021-06-05 07:25:02,557 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:02,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:25:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:25:02,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:25:02,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:25:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:02,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115691602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:02,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:02,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:25:02,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874605226] [2021-06-05 07:25:02,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:25:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:25:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:25:02,628 INFO L87 Difference]: Start difference. First operand 133054 states and 625785 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:25:03,768 INFO L93 Difference]: Finished difference Result 144228 states and 674583 transitions. [2021-06-05 07:25:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:25:03,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:25:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:25:05,013 INFO L225 Difference]: With dead ends: 144228 [2021-06-05 07:25:05,013 INFO L226 Difference]: Without dead ends: 144058 [2021-06-05 07:25:05,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:25:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144058 states. [2021-06-05 07:25:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144058 to 121212. [2021-06-05 07:25:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121212 states, 121211 states have (on average 4.70567852752638) internal successors, (570380), 121211 states have internal predecessors, (570380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121212 states to 121212 states and 570380 transitions. [2021-06-05 07:25:08,361 INFO L78 Accepts]: Start accepts. Automaton has 121212 states and 570380 transitions. Word has length 27 [2021-06-05 07:25:08,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:08,361 INFO L482 AbstractCegarLoop]: Abstraction has 121212 states and 570380 transitions. [2021-06-05 07:25:08,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 121212 states and 570380 transitions. [2021-06-05 07:25:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:08,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:08,652 INFO L521 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] [2021-06-05 07:25:08,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 07:25:08,852 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash -184507126, now seen corresponding path program 22 times [2021-06-05 07:25:08,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:08,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285133729] [2021-06-05 07:25:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:08,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:08,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285133729] [2021-06-05 07:25:08,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285133729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:08,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46362909] [2021-06-05 07:25:08,877 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:08,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:25:08,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:25:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:25:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:25:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:09,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46362909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:09,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:09,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:25:09,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841459294] [2021-06-05 07:25:09,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:25:09,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:09,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:25:09,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:25:09,544 INFO L87 Difference]: Start difference. First operand 121212 states and 570380 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:25:10,537 INFO L93 Difference]: Finished difference Result 142703 states and 667037 transitions. [2021-06-05 07:25:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:25:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:25:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:25:11,520 INFO L225 Difference]: With dead ends: 142703 [2021-06-05 07:25:11,520 INFO L226 Difference]: Without dead ends: 142461 [2021-06-05 07:25:11,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:25:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142461 states. [2021-06-05 07:25:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142461 to 121815. [2021-06-05 07:25:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121815 states, 121814 states have (on average 4.707701906184839) internal successors, (573464), 121814 states have internal predecessors, (573464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121815 states to 121815 states and 573464 transitions. [2021-06-05 07:25:14,808 INFO L78 Accepts]: Start accepts. Automaton has 121815 states and 573464 transitions. Word has length 27 [2021-06-05 07:25:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:14,808 INFO L482 AbstractCegarLoop]: Abstraction has 121815 states and 573464 transitions. [2021-06-05 07:25:14,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:14,808 INFO L276 IsEmpty]: Start isEmpty. Operand 121815 states and 573464 transitions. [2021-06-05 07:25:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:15,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:15,079 INFO L521 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] [2021-06-05 07:25:15,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 07:25:15,280 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:15,280 INFO L82 PathProgramCache]: Analyzing trace with hash 625965006, now seen corresponding path program 9 times [2021-06-05 07:25:15,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:15,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379316296] [2021-06-05 07:25:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:15,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:15,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379316296] [2021-06-05 07:25:15,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379316296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:15,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088698307] [2021-06-05 07:25:15,330 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:15,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:25:15,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:25:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:25:15,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:25:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:15,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088698307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:15,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:15,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 07:25:15,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899682994] [2021-06-05 07:25:15,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:25:15,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:25:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:25:15,417 INFO L87 Difference]: Start difference. First operand 121815 states and 573464 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:25:16,785 INFO L93 Difference]: Finished difference Result 123705 states and 580618 transitions. [2021-06-05 07:25:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:25:16,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:25:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:25:17,239 INFO L225 Difference]: With dead ends: 123705 [2021-06-05 07:25:17,239 INFO L226 Difference]: Without dead ends: 123623 [2021-06-05 07:25:17,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:25:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123623 states. [2021-06-05 07:25:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123623 to 121965. [2021-06-05 07:25:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121965 states, 121964 states have (on average 4.707438260470303) internal successors, (574138), 121964 states have internal predecessors, (574138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121965 states to 121965 states and 574138 transitions. [2021-06-05 07:25:20,873 INFO L78 Accepts]: Start accepts. Automaton has 121965 states and 574138 transitions. Word has length 27 [2021-06-05 07:25:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:20,873 INFO L482 AbstractCegarLoop]: Abstraction has 121965 states and 574138 transitions. [2021-06-05 07:25:20,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 121965 states and 574138 transitions. [2021-06-05 07:25:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:21,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:21,173 INFO L521 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] [2021-06-05 07:25:21,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:21,375 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:21,375 INFO L82 PathProgramCache]: Analyzing trace with hash 871441812, now seen corresponding path program 10 times [2021-06-05 07:25:21,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:21,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451692789] [2021-06-05 07:25:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:21,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:21,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451692789] [2021-06-05 07:25:21,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451692789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:21,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136997421] [2021-06-05 07:25:21,432 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:21,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:25:21,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:25:21,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:25:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:25:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:21,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136997421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:21,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:21,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 07:25:21,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893499509] [2021-06-05 07:25:21,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:25:21,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:21,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:25:21,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:25:21,498 INFO L87 Difference]: Start difference. First operand 121965 states and 574138 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:25:22,817 INFO L93 Difference]: Finished difference Result 122799 states and 577229 transitions. [2021-06-05 07:25:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:25:22,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:25:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:25:23,279 INFO L225 Difference]: With dead ends: 122799 [2021-06-05 07:25:23,279 INFO L226 Difference]: Without dead ends: 122717 [2021-06-05 07:25:23,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:25:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122717 states. [2021-06-05 07:25:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122717 to 121999. [2021-06-05 07:25:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121999 states, 121998 states have (on average 4.707495204839423) internal successors, (574305), 121998 states have internal predecessors, (574305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121999 states to 121999 states and 574305 transitions. [2021-06-05 07:25:26,307 INFO L78 Accepts]: Start accepts. Automaton has 121999 states and 574305 transitions. Word has length 27 [2021-06-05 07:25:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:26,308 INFO L482 AbstractCegarLoop]: Abstraction has 121999 states and 574305 transitions. [2021-06-05 07:25:26,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 121999 states and 574305 transitions. [2021-06-05 07:25:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:26,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:26,602 INFO L521 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] [2021-06-05 07:25:26,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 07:25:26,802 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:26,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1359658504, now seen corresponding path program 11 times [2021-06-05 07:25:26,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:26,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430565825] [2021-06-05 07:25:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:25:27,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430565825] [2021-06-05 07:25:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430565825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264134538] [2021-06-05 07:25:27,388 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:25:27,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:25:27,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:25:27,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:25:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:25:27,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264134538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:27,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:27,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 07:25:27,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478246126] [2021-06-05 07:25:27,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:25:27,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:27,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:25:27,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:25:27,502 INFO L87 Difference]: Start difference. First operand 121999 states and 574305 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:25:28,327 INFO L93 Difference]: Finished difference Result 123187 states and 578845 transitions. [2021-06-05 07:25:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:25:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:25:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:25:28,785 INFO L225 Difference]: With dead ends: 123187 [2021-06-05 07:25:28,786 INFO L226 Difference]: Without dead ends: 123123 [2021-06-05 07:25:28,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:25:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123123 states. [2021-06-05 07:25:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123123 to 122035. [2021-06-05 07:25:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122035 states, 122034 states have (on average 4.707663438058246) internal successors, (574495), 122034 states have internal predecessors, (574495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122035 states to 122035 states and 574495 transitions. [2021-06-05 07:25:32,306 INFO L78 Accepts]: Start accepts. Automaton has 122035 states and 574495 transitions. Word has length 27 [2021-06-05 07:25:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:32,306 INFO L482 AbstractCegarLoop]: Abstraction has 122035 states and 574495 transitions. [2021-06-05 07:25:32,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 122035 states and 574495 transitions. [2021-06-05 07:25:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:32,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:32,591 INFO L521 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] [2021-06-05 07:25:32,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 07:25:32,792 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:32,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1606692178, now seen corresponding path program 1 times [2021-06-05 07:25:32,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:32,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161226335] [2021-06-05 07:25:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:32,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:32,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161226335] [2021-06-05 07:25:32,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161226335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:32,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046022034] [2021-06-05 07:25:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:25:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:25:32,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:32,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046022034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:32,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:32,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:25:32,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170078821] [2021-06-05 07:25:32,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:25:32,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:32,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:25:32,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:25:32,895 INFO L87 Difference]: Start difference. First operand 122035 states and 574495 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:25:34,468 INFO L93 Difference]: Finished difference Result 155104 states and 720964 transitions. [2021-06-05 07:25:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:25:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:25:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:25:35,047 INFO L225 Difference]: With dead ends: 155104 [2021-06-05 07:25:35,047 INFO L226 Difference]: Without dead ends: 154336 [2021-06-05 07:25:35,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:25:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154336 states. [2021-06-05 07:25:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154336 to 143896. [2021-06-05 07:25:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143896 states, 143895 states have (on average 4.698724764585288) internal successors, (676123), 143895 states have internal predecessors, (676123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143896 states to 143896 states and 676123 transitions. [2021-06-05 07:25:39,155 INFO L78 Accepts]: Start accepts. Automaton has 143896 states and 676123 transitions. Word has length 27 [2021-06-05 07:25:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:39,155 INFO L482 AbstractCegarLoop]: Abstraction has 143896 states and 676123 transitions. [2021-06-05 07:25:39,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 143896 states and 676123 transitions. [2021-06-05 07:25:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:39,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:39,497 INFO L521 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] [2021-06-05 07:25:39,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:39,705 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2057426258, now seen corresponding path program 2 times [2021-06-05 07:25:39,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:39,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031845030] [2021-06-05 07:25:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:39,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031845030] [2021-06-05 07:25:39,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031845030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821208597] [2021-06-05 07:25:39,728 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:39,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:25:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:25:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:25:39,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:25:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:39,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821208597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:39,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:39,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:25:39,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050503694] [2021-06-05 07:25:39,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:25:39,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:25:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:25:39,809 INFO L87 Difference]: Start difference. First operand 143896 states and 676123 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-06-05 07:25:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:25:41,935 INFO L93 Difference]: Finished difference Result 192044 states and 890559 transitions. [2021-06-05 07:25:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:25:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 27 [2021-06-05 07:25:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:25:42,985 INFO L225 Difference]: With dead ends: 192044 [2021-06-05 07:25:42,985 INFO L226 Difference]: Without dead ends: 190887 [2021-06-05 07:25:42,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:25:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190887 states. [2021-06-05 07:25:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190887 to 168910. [2021-06-05 07:25:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168910 states, 168909 states have (on average 4.692899727071974) internal successors, (792673), 168909 states have internal predecessors, (792673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168910 states to 168910 states and 792673 transitions. [2021-06-05 07:25:48,243 INFO L78 Accepts]: Start accepts. Automaton has 168910 states and 792673 transitions. Word has length 27 [2021-06-05 07:25:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:48,243 INFO L482 AbstractCegarLoop]: Abstraction has 168910 states and 792673 transitions. [2021-06-05 07:25:48,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-06-05 07:25:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 168910 states and 792673 transitions. [2021-06-05 07:25:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:49,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:49,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:25:49,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:49,473 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1077781872, now seen corresponding path program 20 times [2021-06-05 07:25:49,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:49,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614901472] [2021-06-05 07:25:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:49,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:49,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614901472] [2021-06-05 07:25:49,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614901472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:49,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825537241] [2021-06-05 07:25:49,502 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:49,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:25:49,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:25:49,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:25:49,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:25:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:49,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825537241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:49,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:49,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:25:49,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981517514] [2021-06-05 07:25:49,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:25:49,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:49,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:25:49,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:25:49,602 INFO L87 Difference]: Start difference. First operand 168910 states and 792673 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2021-06-05 07:25:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:25:51,286 INFO L93 Difference]: Finished difference Result 184550 states and 860326 transitions. [2021-06-05 07:25:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:25:51,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 27 [2021-06-05 07:25:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:25:51,969 INFO L225 Difference]: With dead ends: 184550 [2021-06-05 07:25:51,970 INFO L226 Difference]: Without dead ends: 184501 [2021-06-05 07:25:51,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:25:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184501 states. [2021-06-05 07:25:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184501 to 169053. [2021-06-05 07:25:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169053 states, 169052 states have (on average 4.692006009985094) internal successors, (793193), 169052 states have internal predecessors, (793193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:25:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169053 states to 169053 states and 793193 transitions. [2021-06-05 07:25:57,410 INFO L78 Accepts]: Start accepts. Automaton has 169053 states and 793193 transitions. Word has length 27 [2021-06-05 07:25:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:25:57,410 INFO L482 AbstractCegarLoop]: Abstraction has 169053 states and 793193 transitions. [2021-06-05 07:25:57,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2021-06-05 07:25:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 169053 states and 793193 transitions. [2021-06-05 07:25:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:25:57,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:25:57,834 INFO L521 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] [2021-06-05 07:25:58,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:58,035 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:25:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:25:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1048149518, now seen corresponding path program 3 times [2021-06-05 07:25:58,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:25:58,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849693854] [2021-06-05 07:25:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:25:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:25:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:58,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:25:58,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849693854] [2021-06-05 07:25:58,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849693854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:58,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497630325] [2021-06-05 07:25:58,060 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:25:58,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:25:58,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:25:58,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:25:58,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:25:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:25:58,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497630325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:25:58,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:25:58,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:25:58,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426859698] [2021-06-05 07:25:58,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:25:58,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:25:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:25:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:25:58,139 INFO L87 Difference]: Start difference. First operand 169053 states and 793193 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) [2021-06-05 07:26:00,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:26:00,605 INFO L93 Difference]: Finished difference Result 230190 states and 1066278 transitions. [2021-06-05 07:26:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:26:00,605 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 27 [2021-06-05 07:26:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:26:01,559 INFO L225 Difference]: With dead ends: 230190 [2021-06-05 07:26:01,559 INFO L226 Difference]: Without dead ends: 228007 [2021-06-05 07:26:01,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:26:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228007 states. [2021-06-05 07:26:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228007 to 157964. [2021-06-05 07:26:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157964 states, 157963 states have (on average 4.688616954603293) internal successors, (740628), 157963 states have internal predecessors, (740628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157964 states to 157964 states and 740628 transitions. [2021-06-05 07:26:07,192 INFO L78 Accepts]: Start accepts. Automaton has 157964 states and 740628 transitions. Word has length 27 [2021-06-05 07:26:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:26:07,192 INFO L482 AbstractCegarLoop]: Abstraction has 157964 states and 740628 transitions. [2021-06-05 07:26:07,192 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) [2021-06-05 07:26:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 157964 states and 740628 transitions. [2021-06-05 07:26:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:26:07,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:26:07,613 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:26:07,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:07,828 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:26:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:26:07,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1446762584, now seen corresponding path program 21 times [2021-06-05 07:26:07,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:26:07,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067308397] [2021-06-05 07:26:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:26:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:26:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:07,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:26:07,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067308397] [2021-06-05 07:26:07,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067308397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:07,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570180296] [2021-06-05 07:26:07,858 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:07,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:26:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:26:07,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:26:07,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:26:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:07,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570180296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:07,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:26:07,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:26:07,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403126353] [2021-06-05 07:26:07,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:26:07,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:26:07,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:26:07,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:26:07,957 INFO L87 Difference]: Start difference. First operand 157964 states and 740628 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-06-05 07:26:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:26:09,758 INFO L93 Difference]: Finished difference Result 173681 states and 808144 transitions. [2021-06-05 07:26:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:26:09,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 27 [2021-06-05 07:26:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:26:10,390 INFO L225 Difference]: With dead ends: 173681 [2021-06-05 07:26:10,390 INFO L226 Difference]: Without dead ends: 173615 [2021-06-05 07:26:10,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:26:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173615 states. [2021-06-05 07:26:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173615 to 158249. [2021-06-05 07:26:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158249 states, 158248 states have (on average 4.688217228653759) internal successors, (741901), 158248 states have internal predecessors, (741901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158249 states to 158249 states and 741901 transitions. [2021-06-05 07:26:15,395 INFO L78 Accepts]: Start accepts. Automaton has 158249 states and 741901 transitions. Word has length 27 [2021-06-05 07:26:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:26:15,395 INFO L482 AbstractCegarLoop]: Abstraction has 158249 states and 741901 transitions. [2021-06-05 07:26:15,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-06-05 07:26:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 158249 states and 741901 transitions. [2021-06-05 07:26:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:26:15,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:26:15,817 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:26:16,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 07:26:16,017 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:26:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:26:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1299795410, now seen corresponding path program 1 times [2021-06-05 07:26:16,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:26:16,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5691228] [2021-06-05 07:26:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:26:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:26:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:16,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:26:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5691228] [2021-06-05 07:26:16,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5691228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456011195] [2021-06-05 07:26:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:26:16,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:26:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:26:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:16,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456011195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:16,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:26:16,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:26:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155186409] [2021-06-05 07:26:16,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:26:16,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:26:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:26:16,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:16,156 INFO L87 Difference]: Start difference. First operand 158249 states and 741901 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:26:17,811 INFO L93 Difference]: Finished difference Result 160685 states and 751012 transitions. [2021-06-05 07:26:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:26:17,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:26:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:26:18,438 INFO L225 Difference]: With dead ends: 160685 [2021-06-05 07:26:18,438 INFO L226 Difference]: Without dead ends: 160585 [2021-06-05 07:26:18,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160585 states. [2021-06-05 07:26:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160585 to 158284. [2021-06-05 07:26:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158284 states, 158283 states have (on average 4.688456751514692) internal successors, (742103), 158283 states have internal predecessors, (742103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158284 states to 158284 states and 742103 transitions. [2021-06-05 07:26:23,280 INFO L78 Accepts]: Start accepts. Automaton has 158284 states and 742103 transitions. Word has length 27 [2021-06-05 07:26:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:26:23,280 INFO L482 AbstractCegarLoop]: Abstraction has 158284 states and 742103 transitions. [2021-06-05 07:26:23,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 158284 states and 742103 transitions. [2021-06-05 07:26:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:26:23,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:26:23,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:26:23,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 07:26:23,947 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:26:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:26:23,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2127368078, now seen corresponding path program 2 times [2021-06-05 07:26:23,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:26:23,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859984158] [2021-06-05 07:26:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:26:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:26:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:24,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:26:24,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859984158] [2021-06-05 07:26:24,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859984158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:24,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860688558] [2021-06-05 07:26:24,018 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:24,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:26:24,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:26:24,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:26:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:26:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:24,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860688558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:24,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:26:24,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:26:24,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801609823] [2021-06-05 07:26:24,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:26:24,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:26:24,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:26:24,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:24,082 INFO L87 Difference]: Start difference. First operand 158284 states and 742103 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:26:25,634 INFO L93 Difference]: Finished difference Result 161393 states and 754186 transitions. [2021-06-05 07:26:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:26:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:26:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:26:26,795 INFO L225 Difference]: With dead ends: 161393 [2021-06-05 07:26:26,795 INFO L226 Difference]: Without dead ends: 161317 [2021-06-05 07:26:26,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161317 states. [2021-06-05 07:26:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161317 to 158335. [2021-06-05 07:26:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158335 states, 158334 states have (on average 4.688613942678136) internal successors, (742367), 158334 states have internal predecessors, (742367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158335 states to 158335 states and 742367 transitions. [2021-06-05 07:26:31,564 INFO L78 Accepts]: Start accepts. Automaton has 158335 states and 742367 transitions. Word has length 27 [2021-06-05 07:26:31,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:26:31,564 INFO L482 AbstractCegarLoop]: Abstraction has 158335 states and 742367 transitions. [2021-06-05 07:26:31,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 158335 states and 742367 transitions. [2021-06-05 07:26:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:26:31,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:26:31,953 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:26:32,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 07:26:32,153 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:26:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:26:32,154 INFO L82 PathProgramCache]: Analyzing trace with hash -418499338, now seen corresponding path program 3 times [2021-06-05 07:26:32,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:26:32,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168751458] [2021-06-05 07:26:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:26:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:26:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:32,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:26:32,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168751458] [2021-06-05 07:26:32,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168751458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:32,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399935977] [2021-06-05 07:26:32,238 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:32,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:26:32,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:26:32,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:26:32,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:26:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399935977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:32,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:26:32,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:26:32,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997445335] [2021-06-05 07:26:32,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:26:32,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:26:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:26:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:32,308 INFO L87 Difference]: Start difference. First operand 158335 states and 742367 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:26:33,910 INFO L93 Difference]: Finished difference Result 160525 states and 750588 transitions. [2021-06-05 07:26:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:26:33,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:26:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:26:34,526 INFO L225 Difference]: With dead ends: 160525 [2021-06-05 07:26:34,526 INFO L226 Difference]: Without dead ends: 160437 [2021-06-05 07:26:34,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:35,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160437 states. [2021-06-05 07:26:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160437 to 158356. [2021-06-05 07:26:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158356 states, 158355 states have (on average 4.688806794859651) internal successors, (742496), 158355 states have internal predecessors, (742496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158356 states to 158356 states and 742496 transitions. [2021-06-05 07:26:39,334 INFO L78 Accepts]: Start accepts. Automaton has 158356 states and 742496 transitions. Word has length 27 [2021-06-05 07:26:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:26:39,334 INFO L482 AbstractCegarLoop]: Abstraction has 158356 states and 742496 transitions. [2021-06-05 07:26:39,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 158356 states and 742496 transitions. [2021-06-05 07:26:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:26:39,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:26:39,736 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:26:39,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 07:26:39,936 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:26:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:26:39,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1918328274, now seen corresponding path program 4 times [2021-06-05 07:26:39,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:26:39,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923114864] [2021-06-05 07:26:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:26:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:26:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:39,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:26:39,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923114864] [2021-06-05 07:26:39,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923114864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:39,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390709987] [2021-06-05 07:26:39,988 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:40,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:26:40,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:26:40,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:26:40,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:26:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:40,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390709987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:40,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:26:40,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 07:26:40,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428161025] [2021-06-05 07:26:40,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:26:40,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:26:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:26:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:26:40,061 INFO L87 Difference]: Start difference. First operand 158356 states and 742496 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:26:41,590 INFO L93 Difference]: Finished difference Result 163254 states and 762103 transitions. [2021-06-05 07:26:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:26:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:26:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:26:42,214 INFO L225 Difference]: With dead ends: 163254 [2021-06-05 07:26:42,214 INFO L226 Difference]: Without dead ends: 163178 [2021-06-05 07:26:42,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:26:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163178 states. [2021-06-05 07:26:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163178 to 158476. [2021-06-05 07:26:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158476 states, 158475 states have (on average 4.689004574854078) internal successors, (743090), 158475 states have internal predecessors, (743090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158476 states to 158476 states and 743090 transitions. [2021-06-05 07:26:47,092 INFO L78 Accepts]: Start accepts. Automaton has 158476 states and 743090 transitions. Word has length 27 [2021-06-05 07:26:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:26:47,092 INFO L482 AbstractCegarLoop]: Abstraction has 158476 states and 743090 transitions. [2021-06-05 07:26:47,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 158476 states and 743090 transitions. [2021-06-05 07:26:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:26:47,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:26:47,538 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:26:47,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 07:26:47,739 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:26:47,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:26:47,739 INFO L82 PathProgramCache]: Analyzing trace with hash 574596134, now seen corresponding path program 5 times [2021-06-05 07:26:47,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:26:47,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113790437] [2021-06-05 07:26:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:26:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:26:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:47,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:26:47,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113790437] [2021-06-05 07:26:47,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113790437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:47,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106553093] [2021-06-05 07:26:47,805 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:47,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:26:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:26:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:26:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:26:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:47,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106553093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:47,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:26:47,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:26:47,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256254807] [2021-06-05 07:26:47,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:26:47,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:26:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:26:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:47,874 INFO L87 Difference]: Start difference. First operand 158476 states and 743090 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:49,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:26:49,424 INFO L93 Difference]: Finished difference Result 163798 states and 764346 transitions. [2021-06-05 07:26:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:26:49,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:26:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:26:50,031 INFO L225 Difference]: With dead ends: 163798 [2021-06-05 07:26:50,031 INFO L226 Difference]: Without dead ends: 163722 [2021-06-05 07:26:50,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163722 states. [2021-06-05 07:26:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163722 to 158493. [2021-06-05 07:26:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158493 states, 158492 states have (on average 4.688968528379982) internal successors, (743164), 158492 states have internal predecessors, (743164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158493 states to 158493 states and 743164 transitions. [2021-06-05 07:26:54,342 INFO L78 Accepts]: Start accepts. Automaton has 158493 states and 743164 transitions. Word has length 27 [2021-06-05 07:26:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:26:54,342 INFO L482 AbstractCegarLoop]: Abstraction has 158493 states and 743164 transitions. [2021-06-05 07:26:54,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 158493 states and 743164 transitions. [2021-06-05 07:26:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:26:55,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:26:55,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:26:55,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:55,529 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:26:55,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:26:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1971271282, now seen corresponding path program 6 times [2021-06-05 07:26:55,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:26:55,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544265491] [2021-06-05 07:26:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:26:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:26:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:55,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:26:55,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544265491] [2021-06-05 07:26:55,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544265491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:55,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915114990] [2021-06-05 07:26:55,597 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:26:55,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:26:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:26:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:26:55,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:26:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:26:55,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915114990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:26:55,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:26:55,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:26:55,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988678283] [2021-06-05 07:26:55,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:26:55,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:26:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:26:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:55,667 INFO L87 Difference]: Start difference. First operand 158493 states and 743164 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:26:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:26:57,120 INFO L93 Difference]: Finished difference Result 162734 states and 759671 transitions. [2021-06-05 07:26:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:26:57,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:26:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:26:57,722 INFO L225 Difference]: With dead ends: 162734 [2021-06-05 07:26:57,723 INFO L226 Difference]: Without dead ends: 162646 [2021-06-05 07:26:57,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:26:57,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162646 states. [2021-06-05 07:27:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162646 to 158518. [2021-06-05 07:27:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158518 states, 158517 states have (on average 4.689320388349515) internal successors, (743337), 158517 states have internal predecessors, (743337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158518 states to 158518 states and 743337 transitions. [2021-06-05 07:27:02,149 INFO L78 Accepts]: Start accepts. Automaton has 158518 states and 743337 transitions. Word has length 27 [2021-06-05 07:27:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:27:02,149 INFO L482 AbstractCegarLoop]: Abstraction has 158518 states and 743337 transitions. [2021-06-05 07:27:02,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 158518 states and 743337 transitions. [2021-06-05 07:27:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:27:02,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:27:02,521 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:27:02,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 07:27:02,736 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:27:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:27:02,736 INFO L82 PathProgramCache]: Analyzing trace with hash -780202740, now seen corresponding path program 22 times [2021-06-05 07:27:02,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:27:02,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548031534] [2021-06-05 07:27:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:27:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:27:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:02,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:27:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548031534] [2021-06-05 07:27:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548031534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111864076] [2021-06-05 07:27:02,766 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:02,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:27:02,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:27:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:27:02,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:27:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:02,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111864076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:02,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:27:02,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:27:02,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046272309] [2021-06-05 07:27:02,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:27:02,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:27:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:27:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:27:02,852 INFO L87 Difference]: Start difference. First operand 158518 states and 743337 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-06-05 07:27:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:27:05,185 INFO L93 Difference]: Finished difference Result 173326 states and 807474 transitions. [2021-06-05 07:27:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:27:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 27 [2021-06-05 07:27:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:27:05,821 INFO L225 Difference]: With dead ends: 173326 [2021-06-05 07:27:05,821 INFO L226 Difference]: Without dead ends: 173235 [2021-06-05 07:27:05,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:27:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173235 states. [2021-06-05 07:27:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173235 to 158602. [2021-06-05 07:27:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158602 states, 158601 states have (on average 4.687082679176045) internal successors, (743376), 158601 states have internal predecessors, (743376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158602 states to 158602 states and 743376 transitions. [2021-06-05 07:27:10,896 INFO L78 Accepts]: Start accepts. Automaton has 158602 states and 743376 transitions. Word has length 27 [2021-06-05 07:27:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:27:10,896 INFO L482 AbstractCegarLoop]: Abstraction has 158602 states and 743376 transitions. [2021-06-05 07:27:10,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-06-05 07:27:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 158602 states and 743376 transitions. [2021-06-05 07:27:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:27:11,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:27:11,899 INFO L521 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] [2021-06-05 07:27:12,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:12,113 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:27:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:27:12,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1615393102, now seen corresponding path program 23 times [2021-06-05 07:27:12,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:27:12,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340377733] [2021-06-05 07:27:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:27:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:27:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:12,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:27:12,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340377733] [2021-06-05 07:27:12,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340377733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:12,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119506091] [2021-06-05 07:27:12,166 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:12,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:27:12,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:27:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:27:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:27:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:12,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119506091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:12,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:27:12,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 07:27:12,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333954062] [2021-06-05 07:27:12,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:27:12,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:27:12,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:27:12,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:27:12,225 INFO L87 Difference]: Start difference. First operand 158602 states and 743376 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:27:13,667 INFO L93 Difference]: Finished difference Result 160196 states and 749345 transitions. [2021-06-05 07:27:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:27:13,668 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:27:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:27:14,284 INFO L225 Difference]: With dead ends: 160196 [2021-06-05 07:27:14,285 INFO L226 Difference]: Without dead ends: 160087 [2021-06-05 07:27:14,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:27:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160087 states. [2021-06-05 07:27:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160087 to 158858. [2021-06-05 07:27:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158858 states, 158857 states have (on average 4.685679573452854) internal successors, (744353), 158857 states have internal predecessors, (744353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158858 states to 158858 states and 744353 transitions. [2021-06-05 07:27:18,679 INFO L78 Accepts]: Start accepts. Automaton has 158858 states and 744353 transitions. Word has length 27 [2021-06-05 07:27:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:27:18,679 INFO L482 AbstractCegarLoop]: Abstraction has 158858 states and 744353 transitions. [2021-06-05 07:27:18,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 158858 states and 744353 transitions. [2021-06-05 07:27:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:27:19,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:27:19,085 INFO L521 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] [2021-06-05 07:27:19,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:19,286 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:27:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:27:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash 986099410, now seen corresponding path program 24 times [2021-06-05 07:27:19,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:27:19,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140077592] [2021-06-05 07:27:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:27:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:27:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:19,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:27:19,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140077592] [2021-06-05 07:27:19,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140077592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:19,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195913310] [2021-06-05 07:27:19,347 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:19,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:27:19,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:27:19,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:27:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:27:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:19,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195913310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:19,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:27:19,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:27:19,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214059010] [2021-06-05 07:27:19,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:27:19,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:27:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:27:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:27:19,475 INFO L87 Difference]: Start difference. First operand 158858 states and 744353 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:27:21,362 INFO L93 Difference]: Finished difference Result 173498 states and 806452 transitions. [2021-06-05 07:27:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:27:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:27:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:27:22,428 INFO L225 Difference]: With dead ends: 173498 [2021-06-05 07:27:22,428 INFO L226 Difference]: Without dead ends: 173121 [2021-06-05 07:27:22,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:27:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173121 states. [2021-06-05 07:27:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173121 to 159323. [2021-06-05 07:27:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159323 states, 159322 states have (on average 4.6852098266403885) internal successors, (746457), 159322 states have internal predecessors, (746457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159323 states to 159323 states and 746457 transitions. [2021-06-05 07:27:26,907 INFO L78 Accepts]: Start accepts. Automaton has 159323 states and 746457 transitions. Word has length 27 [2021-06-05 07:27:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:27:26,907 INFO L482 AbstractCegarLoop]: Abstraction has 159323 states and 746457 transitions. [2021-06-05 07:27:26,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 159323 states and 746457 transitions. [2021-06-05 07:27:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:27:27,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:27:27,294 INFO L521 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] [2021-06-05 07:27:27,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-05 07:27:27,494 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:27:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:27:27,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1203127400, now seen corresponding path program 25 times [2021-06-05 07:27:27,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:27:27,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638369616] [2021-06-05 07:27:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:27:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:27:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:27,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:27:27,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638369616] [2021-06-05 07:27:27,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638369616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:27,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140264419] [2021-06-05 07:27:27,557 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:27:27,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:27:27,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:27:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:27,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140264419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:27,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:27:27,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:27:27,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669015085] [2021-06-05 07:27:27,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:27:27,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:27:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:27:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:27:27,669 INFO L87 Difference]: Start difference. First operand 159323 states and 746457 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:27:29,362 INFO L93 Difference]: Finished difference Result 161191 states and 753361 transitions. [2021-06-05 07:27:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:27:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 27 [2021-06-05 07:27:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:27:29,944 INFO L225 Difference]: With dead ends: 161191 [2021-06-05 07:27:29,945 INFO L226 Difference]: Without dead ends: 161077 [2021-06-05 07:27:30,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:27:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161077 states. [2021-06-05 07:27:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161077 to 159177. [2021-06-05 07:27:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159177 states, 159176 states have (on average 4.685429964316229) internal successors, (745808), 159176 states have internal predecessors, (745808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159177 states to 159177 states and 745808 transitions. [2021-06-05 07:27:34,452 INFO L78 Accepts]: Start accepts. Automaton has 159177 states and 745808 transitions. Word has length 27 [2021-06-05 07:27:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:27:34,452 INFO L482 AbstractCegarLoop]: Abstraction has 159177 states and 745808 transitions. [2021-06-05 07:27:34,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:34,452 INFO L276 IsEmpty]: Start isEmpty. Operand 159177 states and 745808 transitions. [2021-06-05 07:27:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:27:34,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:27:34,856 INFO L521 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] [2021-06-05 07:27:35,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 07:27:35,069 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:27:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:27:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash 137476938, now seen corresponding path program 26 times [2021-06-05 07:27:35,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:27:35,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911871678] [2021-06-05 07:27:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:27:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:27:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:35,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:27:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911871678] [2021-06-05 07:27:35,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911871678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437827344] [2021-06-05 07:27:35,136 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:35,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:27:35,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:27:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:27:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:27:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:35,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437827344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:35,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:27:35,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:27:35,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078164048] [2021-06-05 07:27:35,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:27:35,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:27:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:27:35,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:27:35,283 INFO L87 Difference]: Start difference. First operand 159177 states and 745808 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:27:38,002 INFO L93 Difference]: Finished difference Result 228696 states and 1062089 transitions. [2021-06-05 07:27:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:27:38,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:27:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:27:38,910 INFO L225 Difference]: With dead ends: 228696 [2021-06-05 07:27:38,910 INFO L226 Difference]: Without dead ends: 228340 [2021-06-05 07:27:38,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:27:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228340 states. [2021-06-05 07:27:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228340 to 162643. [2021-06-05 07:27:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162643 states, 162642 states have (on average 4.686876698515759) internal successors, (762283), 162642 states have internal predecessors, (762283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162643 states to 162643 states and 762283 transitions. [2021-06-05 07:27:44,248 INFO L78 Accepts]: Start accepts. Automaton has 162643 states and 762283 transitions. Word has length 27 [2021-06-05 07:27:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:27:44,248 INFO L482 AbstractCegarLoop]: Abstraction has 162643 states and 762283 transitions. [2021-06-05 07:27:44,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 162643 states and 762283 transitions. [2021-06-05 07:27:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:27:44,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:27:44,657 INFO L521 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] [2021-06-05 07:27:44,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:44,863 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:27:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:27:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash -242677600, now seen corresponding path program 27 times [2021-06-05 07:27:44,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:27:44,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464929752] [2021-06-05 07:27:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:27:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:27:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:44,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:27:44,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464929752] [2021-06-05 07:27:44,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464929752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:44,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503697637] [2021-06-05 07:27:44,927 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:27:44,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:27:44,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:44,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:27:44,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:27:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503697637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:45,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:27:45,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:27:45,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131161846] [2021-06-05 07:27:45,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:27:45,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:27:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:27:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:27:45,063 INFO L87 Difference]: Start difference. First operand 162643 states and 762283 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2021-06-05 07:27:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:27:47,058 INFO L93 Difference]: Finished difference Result 202003 states and 940062 transitions. [2021-06-05 07:27:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:27:47,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 27 [2021-06-05 07:27:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:27:48,499 INFO L225 Difference]: With dead ends: 202003 [2021-06-05 07:27:48,499 INFO L226 Difference]: Without dead ends: 201790 [2021-06-05 07:27:48,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:27:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201790 states. [2021-06-05 07:27:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201790 to 162968. [2021-06-05 07:27:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162968 states, 162967 states have (on average 4.6873354728257866) internal successors, (763881), 162967 states have internal predecessors, (763881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:27:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162968 states to 162968 states and 763881 transitions. [2021-06-05 07:27:53,610 INFO L78 Accepts]: Start accepts. Automaton has 162968 states and 763881 transitions. Word has length 27 [2021-06-05 07:27:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:27:53,611 INFO L482 AbstractCegarLoop]: Abstraction has 162968 states and 763881 transitions. [2021-06-05 07:27:53,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2021-06-05 07:27:53,611 INFO L276 IsEmpty]: Start isEmpty. Operand 162968 states and 763881 transitions. [2021-06-05 07:27:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:27:53,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:27:53,989 INFO L521 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] [2021-06-05 07:27:54,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 07:27:54,190 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:27:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:27:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash 437902734, now seen corresponding path program 28 times [2021-06-05 07:27:54,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:27:54,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755655126] [2021-06-05 07:27:54,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:27:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:27:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:54,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:27:54,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755655126] [2021-06-05 07:27:54,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755655126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:54,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461228985] [2021-06-05 07:27:54,246 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:54,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:27:54,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:27:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:27:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:27:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:27:55,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461228985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:27:55,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:27:55,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:27:55,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7784523] [2021-06-05 07:27:55,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:27:55,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:27:55,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:27:55,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:27:55,017 INFO L87 Difference]: Start difference. First operand 162968 states and 763881 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-06-05 07:27:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:27:56,541 INFO L93 Difference]: Finished difference Result 164630 states and 769931 transitions. [2021-06-05 07:27:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:27:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 27 [2021-06-05 07:27:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:27:57,162 INFO L225 Difference]: With dead ends: 164630 [2021-06-05 07:27:57,162 INFO L226 Difference]: Without dead ends: 164486 [2021-06-05 07:27:57,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 770.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:27:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164486 states. [2021-06-05 07:28:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164486 to 162968. [2021-06-05 07:28:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162968 states, 162967 states have (on average 4.68723115722815) internal successors, (763864), 162967 states have internal predecessors, (763864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162968 states to 162968 states and 763864 transitions. [2021-06-05 07:28:01,513 INFO L78 Accepts]: Start accepts. Automaton has 162968 states and 763864 transitions. Word has length 27 [2021-06-05 07:28:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:01,513 INFO L482 AbstractCegarLoop]: Abstraction has 162968 states and 763864 transitions. [2021-06-05 07:28:01,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-06-05 07:28:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 162968 states and 763864 transitions. [2021-06-05 07:28:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:28:01,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:01,895 INFO L521 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] [2021-06-05 07:28:02,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:02,096 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:28:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:02,096 INFO L82 PathProgramCache]: Analyzing trace with hash -668762346, now seen corresponding path program 29 times [2021-06-05 07:28:02,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:02,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448428294] [2021-06-05 07:28:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:02,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:02,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448428294] [2021-06-05 07:28:02,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448428294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:02,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356826053] [2021-06-05 07:28:02,154 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:02,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:28:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:28:02,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:02,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356826053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:02,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:02,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 07:28:02,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756458476] [2021-06-05 07:28:02,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:28:02,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:28:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:28:02,311 INFO L87 Difference]: Start difference. First operand 162968 states and 763864 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:04,994 INFO L93 Difference]: Finished difference Result 208529 states and 970068 transitions. [2021-06-05 07:28:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:28:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:28:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:05,760 INFO L225 Difference]: With dead ends: 208529 [2021-06-05 07:28:05,761 INFO L226 Difference]: Without dead ends: 208061 [2021-06-05 07:28:05,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:28:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208061 states. [2021-06-05 07:28:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208061 to 163486. [2021-06-05 07:28:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163486 states, 163485 states have (on average 4.687842921368933) internal successors, (766392), 163485 states have internal predecessors, (766392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163486 states to 163486 states and 766392 transitions. [2021-06-05 07:28:10,912 INFO L78 Accepts]: Start accepts. Automaton has 163486 states and 766392 transitions. Word has length 27 [2021-06-05 07:28:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:10,912 INFO L482 AbstractCegarLoop]: Abstraction has 163486 states and 766392 transitions. [2021-06-05 07:28:10,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 163486 states and 766392 transitions. [2021-06-05 07:28:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:28:11,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:11,304 INFO L521 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] [2021-06-05 07:28:11,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:11,504 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:28:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1048916884, now seen corresponding path program 30 times [2021-06-05 07:28:11,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:11,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768658347] [2021-06-05 07:28:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:11,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:11,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768658347] [2021-06-05 07:28:11,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768658347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:11,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265579832] [2021-06-05 07:28:11,563 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:11,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:28:11,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:11,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:28:11,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:11,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265579832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:11,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:11,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:28:11,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088960423] [2021-06-05 07:28:11,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:28:11,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:11,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:28:11,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:28:11,705 INFO L87 Difference]: Start difference. First operand 163486 states and 766392 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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) [2021-06-05 07:28:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:14,149 INFO L93 Difference]: Finished difference Result 203808 states and 947862 transitions. [2021-06-05 07:28:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:28:14,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 27 [2021-06-05 07:28:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:14,899 INFO L225 Difference]: With dead ends: 203808 [2021-06-05 07:28:14,899 INFO L226 Difference]: Without dead ends: 203595 [2021-06-05 07:28:14,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:28:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203595 states. [2021-06-05 07:28:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203595 to 163503. [2021-06-05 07:28:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163503 states, 163502 states have (on average 4.6880833261978445) internal successors, (766511), 163502 states have internal predecessors, (766511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163503 states to 163503 states and 766511 transitions. [2021-06-05 07:28:20,088 INFO L78 Accepts]: Start accepts. Automaton has 163503 states and 766511 transitions. Word has length 27 [2021-06-05 07:28:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:20,088 INFO L482 AbstractCegarLoop]: Abstraction has 163503 states and 766511 transitions. [2021-06-05 07:28:20,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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) [2021-06-05 07:28:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 163503 states and 766511 transitions. [2021-06-05 07:28:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:28:20,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:20,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:20,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 07:28:20,694 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:28:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash 732515862, now seen corresponding path program 7 times [2021-06-05 07:28:20,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:20,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527463273] [2021-06-05 07:28:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:20,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:20,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527463273] [2021-06-05 07:28:20,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527463273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:20,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008503504] [2021-06-05 07:28:20,764 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:20,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:28:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:20,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008503504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:20,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:20,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 07:28:20,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607047780] [2021-06-05 07:28:20,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:28:20,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:20,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:28:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:28:20,876 INFO L87 Difference]: Start difference. First operand 163503 states and 766511 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:22,709 INFO L93 Difference]: Finished difference Result 176174 states and 819037 transitions. [2021-06-05 07:28:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:28:22,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:28:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:23,335 INFO L225 Difference]: With dead ends: 176174 [2021-06-05 07:28:23,336 INFO L226 Difference]: Without dead ends: 175687 [2021-06-05 07:28:23,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:28:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175687 states. [2021-06-05 07:28:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175687 to 165082. [2021-06-05 07:28:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165082 states, 165081 states have (on average 4.68841356667333) internal successors, (773968), 165081 states have internal predecessors, (773968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165082 states to 165082 states and 773968 transitions. [2021-06-05 07:28:28,231 INFO L78 Accepts]: Start accepts. Automaton has 165082 states and 773968 transitions. Word has length 27 [2021-06-05 07:28:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:28,232 INFO L482 AbstractCegarLoop]: Abstraction has 165082 states and 773968 transitions. [2021-06-05 07:28:28,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 165082 states and 773968 transitions. [2021-06-05 07:28:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:28:28,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:28,635 INFO L521 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] [2021-06-05 07:28:28,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 07:28:28,836 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:28:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1951958188, now seen corresponding path program 31 times [2021-06-05 07:28:28,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:28,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577305154] [2021-06-05 07:28:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:28,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:28,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577305154] [2021-06-05 07:28:28,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577305154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:28,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638828337] [2021-06-05 07:28:28,903 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:28,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:28:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:29,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638828337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:29,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:29,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:28:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647886455] [2021-06-05 07:28:29,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:28:29,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:28:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:28:29,018 INFO L87 Difference]: Start difference. First operand 165082 states and 773968 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-06-05 07:28:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:31,282 INFO L93 Difference]: Finished difference Result 206400 states and 959680 transitions. [2021-06-05 07:28:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:28:31,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 27 [2021-06-05 07:28:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:32,573 INFO L225 Difference]: With dead ends: 206400 [2021-06-05 07:28:32,573 INFO L226 Difference]: Without dead ends: 206077 [2021-06-05 07:28:32,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 Received shutdown request... [2021-06-05 07:28:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206077 states. [2021-06-05 07:28:32,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:32,988 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:28:32,989 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:28:32,990 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:28:32,991 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:28:32 BasicIcfg [2021-06-05 07:28:32,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:28:32,991 INFO L168 Benchmark]: Toolchain (without parser) took 661598.65 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 352.2 MB in the beginning and 14.0 GB in the end (delta: -13.7 GB). Peak memory consumption was 8.3 GB. Max. memory is 16.0 GB. [2021-06-05 07:28:32,991 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 373.3 MB. Free memory was 353.3 MB in the beginning and 353.2 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:28:32,991 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.24 ms. Allocated memory is still 373.3 MB. Free memory was 352.0 MB in the beginning and 350.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:28:32,991 INFO L168 Benchmark]: Boogie Preprocessor took 17.23 ms. Allocated memory is still 373.3 MB. Free memory was 350.6 MB in the beginning and 349.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:28:32,991 INFO L168 Benchmark]: RCFGBuilder took 259.63 ms. Allocated memory is still 373.3 MB. Free memory was 349.5 MB in the beginning and 335.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 07:28:32,991 INFO L168 Benchmark]: TraceAbstraction took 661286.73 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 335.5 MB in the beginning and 14.0 GB in the end (delta: -13.7 GB). Peak memory consumption was 8.2 GB. Max. memory is 16.0 GB. [2021-06-05 07:28:32,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 373.3 MB. Free memory was 353.3 MB in the beginning and 353.2 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 31.24 ms. Allocated memory is still 373.3 MB. Free memory was 352.0 MB in the beginning and 350.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.23 ms. Allocated memory is still 373.3 MB. Free memory was 350.6 MB in the beginning and 349.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 259.63 ms. Allocated memory is still 373.3 MB. Free memory was 349.5 MB in the beginning and 335.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 661286.73 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 335.5 MB in the beginning and 14.0 GB in the end (delta: -13.7 GB). Peak memory consumption was 8.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 50 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 661168.9ms, OverallIterations: 134, TraceHistogramMax: 3, EmptinessCheckTime: 37200.0ms, AutomataDifference: 206690.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7351 SDtfs, 15920 SDslu, 29227 SDs, 0 SdLazy, 30945 SolverSat, 4606 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12869.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4441 GetRequests, 2674 SyntacticMatches, 281 SemanticMatches, 1486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5988 ImplicationChecksByTransitivity, 14004.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=181308occurred in iteration=69, InterpolantAutomatonStates: 1566, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 367532.9ms AutomataMinimizationTime, 134 MinimizatonAttempts, 1778404 StatesRemovedByMinimization, 133 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 403.5ms SsaConstructionTime, 1645.6ms SatisfiabilityAnalysisTime, 16774.8ms InterpolantComputationTime, 6504 NumberOfCodeBlocks, 6499 NumberOfCodeBlocksAsserted, 377 NumberOfCheckSat, 6244 ConstructedInterpolants, 0 QuantifiedInterpolants, 31349 SizeOfPredicates, 144 NumberOfNonLiveVariables, 8968 ConjunctsInSsa, 1360 ConjunctsInUnsatCore, 260 InterpolantComputations, 10 PerfectInterpolantSequences, 243/1064 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown