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_sum_const_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:42,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:42,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:42,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:42,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:42,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:42,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:42,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:42,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:42,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:42,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:42,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:42,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:43,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:43,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:43,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:43,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:43,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:43,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:43,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:43,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:43,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:43,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:43,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:43,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:41:43,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:41:43,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:41:43,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:41:43,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:41:43,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:41:43,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:43,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:43,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:43,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:43,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:43,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:43,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:43,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:43,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:43,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:43,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:43,029 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 [2019-10-14 21:41:43,058 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:43,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:43,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:43,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:43,061 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:43,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:43,061 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:43,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:43,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:43,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:43,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:43,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:43,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:43,063 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:43,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:43,063 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:43,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:43,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:43,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:43,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:43,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:43,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:43,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:43,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:43,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:43,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:43,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:43,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:43,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:43,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:43,371 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:43,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:43,376 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:43,377 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:43,378 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2019-10-14 21:41:43,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aeb760e0/dba4f8dd93f147e8bc80259dbd9838b1/FLAG9855fc798 [2019-10-14 21:41:43,908 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:43,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2019-10-14 21:41:43,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aeb760e0/dba4f8dd93f147e8bc80259dbd9838b1/FLAG9855fc798 [2019-10-14 21:41:44,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aeb760e0/dba4f8dd93f147e8bc80259dbd9838b1 [2019-10-14 21:41:44,248 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:44,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:44,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:44,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:44,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:44,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbd8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44, skipping insertion in model container [2019-10-14 21:41:44,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,267 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:44,287 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:44,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:44,482 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:44,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:44,515 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:44,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44 WrapperNode [2019-10-14 21:41:44,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:44,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:44,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:44,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:44,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:44,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:44,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:44,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:44,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (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 [2019-10-14 21:41:44,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:44,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:44,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:44,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-14 21:41:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:41:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:41:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:45,009 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:45,009 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-14 21:41:45,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:45 BoogieIcfgContainer [2019-10-14 21:41:45,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:45,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:45,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:45,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:45,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:44" (1/3) ... [2019-10-14 21:41:45,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2794e0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:45, skipping insertion in model container [2019-10-14 21:41:45,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (2/3) ... [2019-10-14 21:41:45,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2794e0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:45, skipping insertion in model container [2019-10-14 21:41:45,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:45" (3/3) ... [2019-10-14 21:41:45,019 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2019-10-14 21:41:45,029 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:45,039 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:45,058 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:45,090 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:45,091 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:45,091 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:45,091 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:45,091 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:45,091 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:45,091 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:45,092 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-14 21:41:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:41:45,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:45,124 INFO L380 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] [2019-10-14 21:41:45,126 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -340082088, now seen corresponding path program 1 times [2019-10-14 21:41:45,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:45,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644975187] [2019-10-14 21:41:45,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:45,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644975187] [2019-10-14 21:41:45,446 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:45,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:45,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736482616] [2019-10-14 21:41:45,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:45,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:45,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:45,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:45,469 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-10-14 21:41:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:45,638 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2019-10-14 21:41:45,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:45,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-14 21:41:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:45,652 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:41:45,653 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:41:45,659 INFO L600 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 [2019-10-14 21:41:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:41:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 21:41:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:41:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-14 21:41:45,724 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2019-10-14 21:41:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:45,724 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-14 21:41:45,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-14 21:41:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:41:45,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:45,728 INFO L380 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] [2019-10-14 21:41:45,729 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1435036102, now seen corresponding path program 1 times [2019-10-14 21:41:45,731 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:45,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334250707] [2019-10-14 21:41:45,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:45,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334250707] [2019-10-14 21:41:45,909 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:45,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:45,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105071470] [2019-10-14 21:41:45,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:45,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:45,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:45,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:45,913 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2019-10-14 21:41:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:46,089 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-10-14 21:41:46,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:46,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-14 21:41:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:46,091 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:41:46,091 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:41:46,093 INFO L600 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 [2019-10-14 21:41:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:41:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 21:41:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:41:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-10-14 21:41:46,103 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2019-10-14 21:41:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:46,104 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-10-14 21:41:46,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-10-14 21:41:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:41:46,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:46,106 INFO L380 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] [2019-10-14 21:41:46,106 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1431897668, now seen corresponding path program 1 times [2019-10-14 21:41:46,107 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:46,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478566063] [2019-10-14 21:41:46,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:41:46,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478566063] [2019-10-14 21:41:46,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:46,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:46,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053114497] [2019-10-14 21:41:46,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:46,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:46,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:46,207 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 4 states. [2019-10-14 21:41:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:46,346 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-10-14 21:41:46,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:46,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-10-14 21:41:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:46,347 INFO L225 Difference]: With dead ends: 79 [2019-10-14 21:41:46,348 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:41:46,350 INFO L600 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 [2019-10-14 21:41:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:41:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 21:41:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:41:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-10-14 21:41:46,365 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 26 [2019-10-14 21:41:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:46,366 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-10-14 21:41:46,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2019-10-14 21:41:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:41:46,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:46,368 INFO L380 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] [2019-10-14 21:41:46,369 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:46,369 INFO L82 PathProgramCache]: Analyzing trace with hash -820794174, now seen corresponding path program 1 times [2019-10-14 21:41:46,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:46,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992238403] [2019-10-14 21:41:46,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:46,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992238403] [2019-10-14 21:41:46,491 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:46,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:46,492 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462229782] [2019-10-14 21:41:46,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:46,492 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:46,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:46,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:46,495 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2019-10-14 21:41:46,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:46,664 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2019-10-14 21:41:46,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:46,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-14 21:41:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:46,666 INFO L225 Difference]: With dead ends: 75 [2019-10-14 21:41:46,666 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:41:46,667 INFO L600 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 [2019-10-14 21:41:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:41:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2019-10-14 21:41:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:41:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 21:41:46,675 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2019-10-14 21:41:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:46,675 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 21:41:46,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 21:41:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:41:46,677 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:46,677 INFO L380 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] [2019-10-14 21:41:46,677 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:46,678 INFO L82 PathProgramCache]: Analyzing trace with hash -304137992, now seen corresponding path program 1 times [2019-10-14 21:41:46,678 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:46,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122785502] [2019-10-14 21:41:46,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:41:46,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122785502] [2019-10-14 21:41:46,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227891442] [2019-10-14 21:41:46,815 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 [2019-10-14 21:41:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:46,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:41:46,950 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:46,951 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:46,951 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826107750] [2019-10-14 21:41:46,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:46,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:46,954 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2019-10-14 21:41:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:47,089 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 21:41:47,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:47,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-10-14 21:41:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:47,090 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:41:47,090 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:41:47,091 INFO L600 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 [2019-10-14 21:41:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:41:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:41:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:41:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 21:41:47,097 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2019-10-14 21:41:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:47,098 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 21:41:47,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 21:41:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:41:47,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:47,099 INFO L380 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] [2019-10-14 21:41:47,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:47,312 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash -78769546, now seen corresponding path program 2 times [2019-10-14 21:41:47,314 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:47,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130918647] [2019-10-14 21:41:47,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:47,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:47,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:41:47,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130918647] [2019-10-14 21:41:47,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58796339] [2019-10-14 21:41:47,427 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 [2019-10-14 21:41:47,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:47,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:47,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:47,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:41:47,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:47,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:47,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748055658] [2019-10-14 21:41:47,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:47,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:47,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:47,572 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2019-10-14 21:41:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:47,790 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2019-10-14 21:41:47,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:47,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-10-14 21:41:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:47,792 INFO L225 Difference]: With dead ends: 85 [2019-10-14 21:41:47,792 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:41:47,792 INFO L600 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 [2019-10-14 21:41:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:41:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2019-10-14 21:41:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:41:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-10-14 21:41:47,801 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2019-10-14 21:41:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:47,802 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-10-14 21:41:47,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-10-14 21:41:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:41:47,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:47,803 INFO L380 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] [2019-10-14 21:41:48,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:48,012 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash 805210282, now seen corresponding path program 3 times [2019-10-14 21:41:48,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:48,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444437613] [2019-10-14 21:41:48,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:48,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:48,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:50,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444437613] [2019-10-14 21:41:50,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871323415] [2019-10-14 21:41:50,154 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 [2019-10-14 21:41:50,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:50,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:50,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 70 conjunts are in the unsatisfiable core [2019-10-14 21:41:50,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:53,355 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:53,356 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 [2019-10-14 21:41:53,358 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-14 21:41:53,371 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:53,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:53,377 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. [2019-10-14 21:41:53,377 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-10-14 21:41:53,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:53,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:53,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:53,820 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:53,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 38] total 67 [2019-10-14 21:41:53,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370173234] [2019-10-14 21:41:53,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-10-14 21:41:53,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-10-14 21:41:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4214, Unknown=0, NotChecked=0, Total=4422 [2019-10-14 21:41:53,824 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 67 states. [2019-10-14 21:42:00,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:00,345 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2019-10-14 21:42:00,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-14 21:42:00,346 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 52 [2019-10-14 21:42:00,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:00,348 INFO L225 Difference]: With dead ends: 136 [2019-10-14 21:42:00,348 INFO L226 Difference]: Without dead ends: 130 [2019-10-14 21:42:00,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=433, Invalid=8879, Unknown=0, NotChecked=0, Total=9312 [2019-10-14 21:42:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-14 21:42:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2019-10-14 21:42:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:42:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-10-14 21:42:00,366 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2019-10-14 21:42:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:00,366 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-10-14 21:42:00,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-10-14 21:42:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-10-14 21:42:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:42:00,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:00,368 INFO L380 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] [2019-10-14 21:42:00,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:00,577 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:00,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1759673384, now seen corresponding path program 4 times [2019-10-14 21:42:00,578 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:00,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234494200] [2019-10-14 21:42:00,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:00,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:00,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:42:00,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234494200] [2019-10-14 21:42:00,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952499270] [2019-10-14 21:42:00,699 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 [2019-10-14 21:42:00,769 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:00,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:00,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:00,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:42:00,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:00,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:42:00,832 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478129345] [2019-10-14 21:42:00,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:00,833 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:00,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:00,834 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2019-10-14 21:42:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:01,177 INFO L93 Difference]: Finished difference Result 181 states and 207 transitions. [2019-10-14 21:42:01,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:01,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-10-14 21:42:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:01,184 INFO L225 Difference]: With dead ends: 181 [2019-10-14 21:42:01,185 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:42:01,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:42:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2019-10-14 21:42:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:42:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2019-10-14 21:42:01,200 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 54 [2019-10-14 21:42:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:01,201 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2019-10-14 21:42:01,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2019-10-14 21:42:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:42:01,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:01,202 INFO L380 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] [2019-10-14 21:42:01,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:01,406 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:01,407 INFO L82 PathProgramCache]: Analyzing trace with hash 41163494, now seen corresponding path program 5 times [2019-10-14 21:42:01,407 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:01,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056843876] [2019-10-14 21:42:01,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:01,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:01,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:01,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056843876] [2019-10-14 21:42:01,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132769255] [2019-10-14 21:42:01,498 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 [2019-10-14 21:42:01,589 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:42:01,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:01,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:01,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:01,665 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:01,665 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:42:01,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948819378] [2019-10-14 21:42:01,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:01,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:01,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:01,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:01,667 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 14 states. [2019-10-14 21:42:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:02,050 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2019-10-14 21:42:02,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:02,051 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-10-14 21:42:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:02,052 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:42:02,052 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:42:02,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:42:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2019-10-14 21:42:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 21:42:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2019-10-14 21:42:02,062 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2019-10-14 21:42:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:02,062 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2019-10-14 21:42:02,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2019-10-14 21:42:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:42:02,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:02,064 INFO L380 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] [2019-10-14 21:42:02,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:02,279 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash 351008988, now seen corresponding path program 6 times [2019-10-14 21:42:02,280 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:02,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545861748] [2019-10-14 21:42:02,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:02,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:02,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,577 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-14 21:42:03,738 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-14 21:42:04,730 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2019-10-14 21:42:05,405 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-10-14 21:42:05,598 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-10-14 21:42:05,780 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2019-10-14 21:42:05,955 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-10-14 21:42:06,583 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-10-14 21:42:06,795 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2019-10-14 21:42:07,008 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2019-10-14 21:42:07,242 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-10-14 21:42:07,469 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-10-14 21:42:07,721 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2019-10-14 21:42:08,097 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2019-10-14 21:42:08,363 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2019-10-14 21:42:08,637 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-10-14 21:42:08,850 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2019-10-14 21:42:09,098 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2019-10-14 21:42:09,621 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-10-14 21:42:09,813 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-14 21:42:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:10,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545861748] [2019-10-14 21:42:10,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854739633] [2019-10-14 21:42:10,622 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 [2019-10-14 21:42:10,688 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:42:10,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:10,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2019-10-14 21:42:10,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:14,422 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:14,424 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:14,425 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:14,430 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:14,430 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 23 [2019-10-14 21:42:14,431 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:14,435 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:14,435 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:14,436 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:3 [2019-10-14 21:42:14,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:14,641 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:14,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 47] total 104 [2019-10-14 21:42:14,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537916065] [2019-10-14 21:42:14,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-10-14 21:42:14,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-10-14 21:42:14,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=10019, Unknown=0, NotChecked=0, Total=10712 [2019-10-14 21:42:14,646 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 104 states. [2019-10-14 21:42:17,265 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 32 [2019-10-14 21:42:17,770 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 36 [2019-10-14 21:42:18,279 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 56 [2019-10-14 21:42:18,638 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 33 [2019-10-14 21:42:18,958 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 35 [2019-10-14 21:42:19,307 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2019-10-14 21:42:20,653 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2019-10-14 21:42:22,002 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 42 [2019-10-14 21:42:22,298 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2019-10-14 21:42:24,890 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 37 [2019-10-14 21:42:25,249 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2019-10-14 21:42:25,524 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2019-10-14 21:42:25,825 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 40 [2019-10-14 21:42:27,341 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 54