/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:37:46,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:37:46,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:37:46,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:37:46,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:37:46,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:37:46,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:37:46,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:37:46,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:37:46,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:37:46,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:37:46,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:37:46,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:37:46,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:37:46,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:37:46,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:37:46,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:37:46,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:37:46,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:37:46,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:37:46,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:37:46,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:37:46,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:37:46,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:37:46,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:37:46,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:37:46,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:37:46,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:37:46,344 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:37:46,358 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:37:46,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:37:46,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:37:46,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:37:46,360 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:37:46,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:37:46,360 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:37:46,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:37:46,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:37:46,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:37:46,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:37:46,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:37:46,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:37:46,362 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:37:46,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:37:46,362 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:37:46,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:37:46,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:37:46,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:37:46,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:37:46,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:37:46,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:37:46,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:37:46,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:37:46,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:37:46,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:37:46,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:37:46,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:37:46,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:37:46,627 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:37:46,639 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:37:46,642 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:37:46,644 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:37:46,644 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:37:46,645 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2019-11-06 18:37:46,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c9d30aa/cdd8361776d4496eb191010a3bd0e801/FLAG7c1d41c70 [2019-11-06 18:37:47,185 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:37:47,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum3.c [2019-11-06 18:37:47,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c9d30aa/cdd8361776d4496eb191010a3bd0e801/FLAG7c1d41c70 [2019-11-06 18:37:47,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c9d30aa/cdd8361776d4496eb191010a3bd0e801 [2019-11-06 18:37:47,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:37:47,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:37:47,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:37:47,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:37:47,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:37:47,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:47,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510f79ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47, skipping insertion in model container [2019-11-06 18:37:47,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:47,626 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:37:47,645 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:37:47,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:37:47,857 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:37:47,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:37:47,978 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:37:47,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47 WrapperNode [2019-11-06 18:37:47,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:37:47,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:37:47,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:37:47,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:37:47,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:47,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:47,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:47,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:48,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:48,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:48,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (1/1) ... [2019-11-06 18:37:48,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:37:48,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:37:48,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:37:48,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:37:48,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (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 [2019-11-06 18:37:48,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:37:48,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:37:48,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:37:48,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:37:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:37:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:37:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:37:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-11-06 18:37:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:37:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:37:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:37:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:37:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:37:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:37:48,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:37:48,429 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:37:48,429 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-06 18:37:48,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:37:48 BoogieIcfgContainer [2019-11-06 18:37:48,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:37:48,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:37:48,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:37:48,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:37:48,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:37:47" (1/3) ... [2019-11-06 18:37:48,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3014a373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:37:48, skipping insertion in model container [2019-11-06 18:37:48,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:47" (2/3) ... [2019-11-06 18:37:48,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3014a373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:37:48, skipping insertion in model container [2019-11-06 18:37:48,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:37:48" (3/3) ... [2019-11-06 18:37:48,438 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2019-11-06 18:37:48,448 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:37:48,455 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:37:48,465 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:37:48,487 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:37:48,487 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:37:48,487 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:37:48,487 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:37:48,487 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:37:48,487 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:37:48,487 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:37:48,488 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:37:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-06 18:37:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:37:48,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:48,514 INFO L410 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] [2019-11-06 18:37:48,516 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash -604531369, now seen corresponding path program 1 times [2019-11-06 18:37:48,528 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:48,528 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732517124] [2019-11-06 18:37:48,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:37:48,703 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732517124] [2019-11-06 18:37:48,704 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:48,704 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:37:48,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420677244] [2019-11-06 18:37:48,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:48,711 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:37:48,724 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2019-11-06 18:37:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:48,878 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2019-11-06 18:37:48,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:48,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-06 18:37:48,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:48,893 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:37:48,893 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 18:37:48,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:37:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 18:37:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 18:37:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:37:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-06 18:37:48,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2019-11-06 18:37:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:48,939 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-06 18:37:48,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-06 18:37:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:37:48,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:48,941 INFO L410 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] [2019-11-06 18:37:48,942 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:48,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1170586821, now seen corresponding path program 1 times [2019-11-06 18:37:48,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:48,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858563666] [2019-11-06 18:37:48,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:37:49,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858563666] [2019-11-06 18:37:49,112 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:49,112 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:37:49,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71118255] [2019-11-06 18:37:49,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:37:49,114 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:37:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:37:49,115 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2019-11-06 18:37:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:49,314 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-11-06 18:37:49,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:37:49,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-06 18:37:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:49,317 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:37:49,317 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:37:49,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:37:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:37:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-06 18:37:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:37:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-11-06 18:37:49,337 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2019-11-06 18:37:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:49,338 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-11-06 18:37:49,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:37:49,338 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-11-06 18:37:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:37:49,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:49,341 INFO L410 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] [2019-11-06 18:37:49,342 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash 669656451, now seen corresponding path program 1 times [2019-11-06 18:37:49,344 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:49,345 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369781775] [2019-11-06 18:37:49,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:37:49,435 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369781775] [2019-11-06 18:37:49,435 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:49,435 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:37:49,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169888272] [2019-11-06 18:37:49,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:37:49,436 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:49,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:37:49,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:37:49,437 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 4 states. [2019-11-06 18:37:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:49,551 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-11-06 18:37:49,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:37:49,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-11-06 18:37:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:49,554 INFO L225 Difference]: With dead ends: 79 [2019-11-06 18:37:49,554 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:37:49,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:37:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:37:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-06 18:37:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:37:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-11-06 18:37:49,575 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 26 [2019-11-06 18:37:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:49,575 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-11-06 18:37:49,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:37:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2019-11-06 18:37:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:37:49,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:49,577 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:49,577 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1075251265, now seen corresponding path program 1 times [2019-11-06 18:37:49,578 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:49,579 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611841256] [2019-11-06 18:37:49,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:37:49,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611841256] [2019-11-06 18:37:49,653 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:49,654 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:37:49,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592916855] [2019-11-06 18:37:49,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:37:49,655 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:49,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:37:49,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:37:49,655 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2019-11-06 18:37:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:49,789 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2019-11-06 18:37:49,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:37:49,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-06 18:37:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:49,790 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:37:49,791 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:37:49,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:37:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:37:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2019-11-06 18:37:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:37:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-06 18:37:49,798 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2019-11-06 18:37:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:49,799 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-06 18:37:49,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:37:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-06 18:37:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:37:49,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:49,800 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:49,800 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash -215297609, now seen corresponding path program 1 times [2019-11-06 18:37:49,801 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:49,801 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360621321] [2019-11-06 18:37:49,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:37:49,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360621321] [2019-11-06 18:37:49,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032243962] [2019-11-06 18:37:49,916 INFO L94 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 [2019-11-06 18:37:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:49,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:37:49,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:37:50,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:50,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:37:50,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156112775] [2019-11-06 18:37:50,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:37:50,049 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:50,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:37:50,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:50,051 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2019-11-06 18:37:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:50,169 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:37:50,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:37:50,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-11-06 18:37:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:50,170 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:37:50,170 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:37:50,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:37:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:37:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:37:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-11-06 18:37:50,190 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2019-11-06 18:37:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:50,190 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-11-06 18:37:50,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:37:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-11-06 18:37:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:37:50,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:50,194 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:50,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:50,397 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash -632060043, now seen corresponding path program 2 times [2019-11-06 18:37:50,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:50,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107934244] [2019-11-06 18:37:50,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:37:50,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107934244] [2019-11-06 18:37:50,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4404528] [2019-11-06 18:37:50,527 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:50,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:50,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:50,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:37:50,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:37:50,630 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:50,630 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 18:37:50,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929968740] [2019-11-06 18:37:50,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:37:50,632 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:50,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:37:50,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:37:50,632 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2019-11-06 18:37:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:50,843 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2019-11-06 18:37:50,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:37:50,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-11-06 18:37:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:50,845 INFO L225 Difference]: With dead ends: 84 [2019-11-06 18:37:50,845 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:37:50,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:37:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:37:50,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2019-11-06 18:37:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:37:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-11-06 18:37:50,854 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2019-11-06 18:37:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:50,854 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-11-06 18:37:50,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:37:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-11-06 18:37:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:37:50,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:50,856 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:51,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:51,061 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1758734551, now seen corresponding path program 3 times [2019-11-06 18:37:51,062 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:51,063 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042886586] [2019-11-06 18:37:51,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:37:51,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042886586] [2019-11-06 18:37:51,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717860115] [2019-11-06 18:37:51,999 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:52,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:37:52,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:52,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 68 conjunts are in the unsatisfiable core [2019-11-06 18:37:52,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:52,986 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:37:52,987 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-06 18:37:52,988 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-06 18:37:53,002 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:37:53,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:37:53,009 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:37:53,010 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-11-06 18:37:53,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:37:53,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:37:53,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:37:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:37:53,261 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:53,261 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 36 [2019-11-06 18:37:53,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653695509] [2019-11-06 18:37:53,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:37:53,262 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:53,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:37:53,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:37:53,264 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 36 states. [2019-11-06 18:37:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:55,093 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2019-11-06 18:37:55,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:37:55,093 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 52 [2019-11-06 18:37:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:55,096 INFO L225 Difference]: With dead ends: 136 [2019-11-06 18:37:55,096 INFO L226 Difference]: Without dead ends: 130 [2019-11-06 18:37:55,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2019-11-06 18:37:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-06 18:37:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2019-11-06 18:37:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:37:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-11-06 18:37:55,116 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2019-11-06 18:37:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:55,116 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-11-06 18:37:55,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:37:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-11-06 18:37:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:37:55,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:55,118 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:55,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:55,323 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:55,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:55,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1204603161, now seen corresponding path program 4 times [2019-11-06 18:37:55,324 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:55,324 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813897870] [2019-11-06 18:37:55,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:37:55,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813897870] [2019-11-06 18:37:55,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375509191] [2019-11-06 18:37:55,413 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:55,476 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:55,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:55,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:37:55,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:37:55,558 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:55,559 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:37:55,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358149136] [2019-11-06 18:37:55,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:37:55,560 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:37:55,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:37:55,560 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2019-11-06 18:37:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:55,910 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2019-11-06 18:37:55,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:37:55,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-06 18:37:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:55,911 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:37:55,912 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:37:55,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:37:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:37:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-06 18:37:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-06 18:37:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2019-11-06 18:37:55,930 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 54 [2019-11-06 18:37:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:55,931 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2019-11-06 18:37:55,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:37:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2019-11-06 18:37:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:37:55,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:55,933 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:56,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:56,139 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:56,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1197781157, now seen corresponding path program 5 times [2019-11-06 18:37:56,140 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:56,140 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270473455] [2019-11-06 18:37:56,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:37:56,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270473455] [2019-11-06 18:37:56,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550016705] [2019-11-06 18:37:56,237 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:56,347 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:37:56,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:56,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:37:56,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:37:56,419 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:56,419 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:37:56,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047238895] [2019-11-06 18:37:56,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:37:56,420 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:56,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:37:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:37:56,421 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 14 states. [2019-11-06 18:37:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:56,736 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2019-11-06 18:37:56,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:37:56,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-11-06 18:37:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:56,738 INFO L225 Difference]: With dead ends: 131 [2019-11-06 18:37:56,738 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:37:56,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:37:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:37:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2019-11-06 18:37:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:37:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2019-11-06 18:37:56,748 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2019-11-06 18:37:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:56,749 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2019-11-06 18:37:56,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:37:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2019-11-06 18:37:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:37:56,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:56,750 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:56,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:56,957 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash 115993883, now seen corresponding path program 6 times [2019-11-06 18:37:56,958 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:56,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106334505] [2019-11-06 18:37:56,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:57,654 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 20 [2019-11-06 18:37:57,816 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2019-11-06 18:37:57,947 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2019-11-06 18:37:58,110 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2019-11-06 18:37:58,263 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2019-11-06 18:37:58,395 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2019-11-06 18:37:58,523 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2019-11-06 18:37:58,681 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2019-11-06 18:37:58,830 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2019-11-06 18:37:58,989 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2019-11-06 18:37:59,179 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2019-11-06 18:38:00,109 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2019-11-06 18:38:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:01,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106334505] [2019-11-06 18:38:01,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302555335] [2019-11-06 18:38:01,770 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:01,836 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:38:01,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:01,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 93 conjunts are in the unsatisfiable core [2019-11-06 18:38:01,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:07,576 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:07,577 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:07,579 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:07,580 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:07,581 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:07,582 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:07,583 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:07,585 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:07,586 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:07,587 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:07,588 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:07,589 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:07,590 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:07,630 INFO L341 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2019-11-06 18:38:07,631 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 88 treesize of output 41 [2019-11-06 18:38:07,632 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:07,647 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:07,648 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:07,649 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:3 [2019-11-06 18:38:07,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:38:07,883 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:07,883 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 51] total 90 [2019-11-06 18:38:07,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891894187] [2019-11-06 18:38:07,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-11-06 18:38:07,884 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-11-06 18:38:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=7345, Unknown=0, NotChecked=0, Total=8010 [2019-11-06 18:38:07,887 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 90 states. [2019-11-06 18:38:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:21,908 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2019-11-06 18:38:21,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-06 18:38:21,909 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 66 [2019-11-06 18:38:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:21,911 INFO L225 Difference]: With dead ends: 120 [2019-11-06 18:38:21,911 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:38:21,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 20 SyntacticMatches, 18 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1086, Invalid=11796, Unknown=0, NotChecked=0, Total=12882 [2019-11-06 18:38:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:38:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2019-11-06 18:38:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-06 18:38:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2019-11-06 18:38:21,927 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 66 [2019-11-06 18:38:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:21,928 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2019-11-06 18:38:21,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-11-06 18:38:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2019-11-06 18:38:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 18:38:21,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:21,929 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:22,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:22,136 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash 818124889, now seen corresponding path program 7 times [2019-11-06 18:38:22,137 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:22,137 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300463419] [2019-11-06 18:38:22,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 18:38:22,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300463419] [2019-11-06 18:38:22,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321293304] [2019-11-06 18:38:22,301 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:22,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:38:22,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 18:38:22,494 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:22,494 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-11-06 18:38:22,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121022326] [2019-11-06 18:38:22,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:38:22,499 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:22,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:38:22,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:38:22,500 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 17 states. [2019-11-06 18:38:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:22,925 INFO L93 Difference]: Finished difference Result 202 states and 224 transitions. [2019-11-06 18:38:22,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:38:22,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2019-11-06 18:38:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:22,927 INFO L225 Difference]: With dead ends: 202 [2019-11-06 18:38:22,928 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:38:22,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:38:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:38:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-11-06 18:38:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-06 18:38:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2019-11-06 18:38:22,939 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 68 [2019-11-06 18:38:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:22,940 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2019-11-06 18:38:22,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:38:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2019-11-06 18:38:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 18:38:22,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:22,942 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:23,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:23,145 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1011232151, now seen corresponding path program 8 times [2019-11-06 18:38:23,146 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:23,147 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897347890] [2019-11-06 18:38:23,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 18:38:23,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897347890] [2019-11-06 18:38:23,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053412360] [2019-11-06 18:38:23,317 INFO L92 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 [2019-11-06 18:38:23,388 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:38:23,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:23,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:38:23,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 18:38:23,462 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:23,462 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-11-06 18:38:23,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287563937] [2019-11-06 18:38:23,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:38:23,463 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:23,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:38:23,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:38:23,464 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 17 states. [2019-11-06 18:38:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:23,886 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2019-11-06 18:38:23,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:38:23,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2019-11-06 18:38:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:23,888 INFO L225 Difference]: With dead ends: 161 [2019-11-06 18:38:23,888 INFO L226 Difference]: Without dead ends: 87 [2019-11-06 18:38:23,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:38:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-06 18:38:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2019-11-06 18:38:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 18:38:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2019-11-06 18:38:23,896 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 70 [2019-11-06 18:38:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:23,897 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2019-11-06 18:38:23,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:38:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2019-11-06 18:38:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 18:38:23,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:23,899 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:24,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:24,103 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash 185480077, now seen corresponding path program 9 times [2019-11-06 18:38:24,104 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:24,104 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089330603] [2019-11-06 18:38:24,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:25,018 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2019-11-06 18:38:25,271 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2019-11-06 18:38:25,467 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2019-11-06 18:38:25,667 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2019-11-06 18:38:25,897 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2019-11-06 18:38:26,094 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2019-11-06 18:38:26,283 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-11-06 18:38:26,487 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2019-11-06 18:38:26,628 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2019-11-06 18:38:26,775 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2019-11-06 18:38:26,957 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2019-11-06 18:38:27,138 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2019-11-06 18:38:27,322 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2019-11-06 18:38:27,514 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2019-11-06 18:38:27,672 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2019-11-06 18:38:28,323 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 22 [2019-11-06 18:38:28,482 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 24 [2019-11-06 18:38:28,661 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2019-11-06 18:38:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 1 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:30,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089330603] [2019-11-06 18:38:30,262 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093874256] [2019-11-06 18:38:30,262 INFO L92 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 [2019-11-06 18:38:30,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 18:38:30,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:30,338 WARN L254 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 118 conjunts are in the unsatisfiable core [2019-11-06 18:38:30,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:30,379 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-06 18:38:30,379 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:30,386 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:30,387 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:30,387 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10