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/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:52,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:52,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:52,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:52,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:52,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:52,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:52,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:52,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:52,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:52,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:52,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:52,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:52,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:52,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:52,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:52,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:52,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:52,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:52,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:52,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:52,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:52,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:52,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:52,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:52,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:52,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:52,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:53,000 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 23:16:53,036 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:53,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:53,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:53,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:53,041 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:53,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:53,042 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:53,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:53,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:53,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:53,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:53,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:53,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:53,043 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:53,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:53,043 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:53,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:53,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:53,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:53,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:53,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:53,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:53,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:53,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:53,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:53,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:53,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:53,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:53,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:53,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:53,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:53,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:53,378 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:53,378 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:53,379 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2019-10-14 23:16:53,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beabcb843/25cda2b820d247c7beddfb2ba53d9014/FLAG9e2f23809 [2019-10-14 23:16:53,877 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:53,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i [2019-10-14 23:16:53,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beabcb843/25cda2b820d247c7beddfb2ba53d9014/FLAG9e2f23809 [2019-10-14 23:16:54,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beabcb843/25cda2b820d247c7beddfb2ba53d9014 [2019-10-14 23:16:54,330 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:54,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:54,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:54,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:54,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:54,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54, skipping insertion in model container [2019-10-14 23:16:54,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,352 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:54,374 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:54,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:54,625 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:54,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:54,773 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:54,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54 WrapperNode [2019-10-14 23:16:54,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:54,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:54,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:54,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:54,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (1/1) ... [2019-10-14 23:16:54,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:54,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:54,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:54,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:54,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:54,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:54,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:54,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:54,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:16:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:16:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 23:16:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:16:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:16:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:16:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:55,220 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:55,220 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 23:16:55,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:55 BoogieIcfgContainer [2019-10-14 23:16:55,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:55,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:55,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:55,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:55,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:54" (1/3) ... [2019-10-14 23:16:55,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0e3df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:55, skipping insertion in model container [2019-10-14 23:16:55,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:54" (2/3) ... [2019-10-14 23:16:55,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0e3df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:55, skipping insertion in model container [2019-10-14 23:16:55,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:55" (3/3) ... [2019-10-14 23:16:55,230 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2019-10-14 23:16:55,238 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:55,245 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:55,254 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:55,277 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:55,277 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:55,277 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:55,277 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:55,277 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:55,278 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:55,278 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:55,278 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 23:16:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:16:55,301 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:55,302 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:55,303 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1823924036, now seen corresponding path program 1 times [2019-10-14 23:16:55,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:55,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642724180] [2019-10-14 23:16:55,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:55,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:55,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,507 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 23:16:55,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642724180] [2019-10-14 23:16:55,509 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:55,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:55,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471843115] [2019-10-14 23:16:55,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:55,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:55,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:55,538 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 23:16:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:55,681 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2019-10-14 23:16:55,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:55,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 23:16:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:55,691 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:16:55,691 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:16:55,694 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 23:16:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:16:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:16:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:16:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 23:16:55,733 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-10-14 23:16:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:55,734 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 23:16:55,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 23:16:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:16:55,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:55,735 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:55,736 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1169658974, now seen corresponding path program 1 times [2019-10-14 23:16:55,736 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:55,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792955488] [2019-10-14 23:16:55,737 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:55,737 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:55,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,969 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 23:16:55,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792955488] [2019-10-14 23:16:55,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:55,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:55,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14275149] [2019-10-14 23:16:55,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:55,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:55,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:55,974 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2019-10-14 23:16:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:56,174 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2019-10-14 23:16:56,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:56,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-14 23:16:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:56,178 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:16:56,178 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:16:56,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:56,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:16:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2019-10-14 23:16:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:16:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-10-14 23:16:56,194 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2019-10-14 23:16:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:56,195 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-10-14 23:16:56,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-14 23:16:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:16:56,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:56,199 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] [2019-10-14 23:16:56,201 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1835570138, now seen corresponding path program 1 times [2019-10-14 23:16:56,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:56,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828272075] [2019-10-14 23:16:56,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:56,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:56,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,222 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 34 [2019-10-14 23:16:57,525 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 44 [2019-10-14 23:16:57,883 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 47 [2019-10-14 23:16:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:57,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828272075] [2019-10-14 23:16:57,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745295295] [2019-10-14 23:16:57,968 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 23:16:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 23:16:58,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:58,152 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:58,153 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 27 [2019-10-14 23:16:58,154 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:58,160 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:58,160 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:58,160 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2019-10-14 23:16:58,227 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-10-14 23:16:58,229 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:58,256 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:58,257 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:58,257 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-10-14 23:16:58,349 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2019-10-14 23:16:58,350 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:58,358 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:58,359 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:58,359 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:51, output treesize:5 [2019-10-14 23:16:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:16:58,422 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:58,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2019-10-14 23:16:58,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26533789] [2019-10-14 23:16:58,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:16:58,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:16:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:58,425 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 20 states. [2019-10-14 23:16:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:59,323 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2019-10-14 23:16:59,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:16:59,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-10-14 23:16:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:59,325 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:16:59,325 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:16:59,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:16:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2019-10-14 23:16:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:16:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-10-14 23:16:59,334 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2019-10-14 23:16:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:59,334 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-10-14 23:16:59,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:16:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-10-14 23:16:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:16:59,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:59,336 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:59,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:59,541 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:59,542 INFO L82 PathProgramCache]: Analyzing trace with hash 997765806, now seen corresponding path program 1 times [2019-10-14 23:16:59,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:59,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709614400] [2019-10-14 23:16:59,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:59,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:59,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:59,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709614400] [2019-10-14 23:16:59,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671071033] [2019-10-14 23:16:59,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:59,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:16:59,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:16:59,923 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:59,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-10-14 23:16:59,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168311326] [2019-10-14 23:16:59,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:16:59,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:59,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:16:59,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:59,927 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 12 states. [2019-10-14 23:17:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:00,219 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2019-10-14 23:17:00,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:00,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-10-14 23:17:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:00,223 INFO L225 Difference]: With dead ends: 76 [2019-10-14 23:17:00,223 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:17:00,225 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:17:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:17:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2019-10-14 23:17:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:17:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-10-14 23:17:00,239 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2019-10-14 23:17:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:00,240 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-10-14 23:17:00,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:17:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-10-14 23:17:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:17:00,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:00,243 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:17:00,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:00,448 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1913486187, now seen corresponding path program 2 times [2019-10-14 23:17:00,449 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:00,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795736259] [2019-10-14 23:17:00,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:00,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:00,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:00,901 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2019-10-14 23:17:01,225 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2019-10-14 23:17:01,567 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 47 [2019-10-14 23:17:01,734 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 40 [2019-10-14 23:17:02,057 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 39 [2019-10-14 23:17:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:02,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795736259] [2019-10-14 23:17:02,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521061155] [2019-10-14 23:17:02,183 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 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 23:17:02,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:02,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:02,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-14 23:17:02,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:02,275 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:02,276 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 27 [2019-10-14 23:17:02,277 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:02,284 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:02,285 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:02,286 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2019-10-14 23:17:02,395 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-10-14 23:17:02,397 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:02,408 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:02,408 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:02,409 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2019-10-14 23:17:02,899 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 15 [2019-10-14 23:17:02,899 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:02,908 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:02,909 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:02,910 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:5 [2019-10-14 23:17:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:17:02,979 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:02,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 30 [2019-10-14 23:17:02,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112936656] [2019-10-14 23:17:02,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:17:02,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:02,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:17:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:17:02,981 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 30 states. [2019-10-14 23:17:03,479 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2019-10-14 23:17:06,054 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2019-10-14 23:17:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:07,431 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2019-10-14 23:17:07,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:17:07,431 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2019-10-14 23:17:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:07,433 INFO L225 Difference]: With dead ends: 88 [2019-10-14 23:17:07,433 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:17:07,435 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=347, Invalid=2409, Unknown=0, NotChecked=0, Total=2756 [2019-10-14 23:17:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:17:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-10-14 23:17:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:17:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2019-10-14 23:17:07,447 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 41 [2019-10-14 23:17:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:07,448 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2019-10-14 23:17:07,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:17:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2019-10-14 23:17:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:17:07,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:07,450 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-14 23:17:07,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:07,653 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:07,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1732717085, now seen corresponding path program 3 times [2019-10-14 23:17:07,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:07,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842683467] [2019-10-14 23:17:07,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:07,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:07,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:17:07,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842683467] [2019-10-14 23:17:07,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305081039] [2019-10-14 23:17:07,930 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 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 23:17:07,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:17:07,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:07,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:17:07,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 23:17:08,186 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:08,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-10-14 23:17:08,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315211972] [2019-10-14 23:17:08,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:17:08,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:08,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:17:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:17:08,188 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 17 states. [2019-10-14 23:17:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:08,708 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2019-10-14 23:17:08,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:17:08,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2019-10-14 23:17:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:08,710 INFO L225 Difference]: With dead ends: 102 [2019-10-14 23:17:08,710 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 23:17:08,711 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:17:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 23:17:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-10-14 23:17:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 23:17:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-10-14 23:17:08,722 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 52 [2019-10-14 23:17:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:08,722 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-10-14 23:17:08,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:17:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-10-14 23:17:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 23:17:08,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:08,725 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:08,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:08,936 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1071400400, now seen corresponding path program 4 times [2019-10-14 23:17:08,937 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:08,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542345812] [2019-10-14 23:17:08,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:08,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:08,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,899 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 37 [2019-10-14 23:17:10,369 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 42 [2019-10-14 23:17:10,580 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 36 [2019-10-14 23:17:10,908 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 31 [2019-10-14 23:17:11,329 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 60 [2019-10-14 23:17:11,556 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 60 [2019-10-14 23:17:11,973 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 40 [2019-10-14 23:17:12,147 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2019-10-14 23:17:12,467 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 41 [2019-10-14 23:17:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:12,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542345812] [2019-10-14 23:17:12,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982213908] [2019-10-14 23:17:12,641 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 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 23:17:12,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:12,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:12,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-14 23:17:12,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:12,736 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:12,736 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 27 [2019-10-14 23:17:12,737 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:12,745 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:12,745 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:12,745 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2019-10-14 23:17:12,923 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 23:17:12,924 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:12,931 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:12,932 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:12,932 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2019-10-14 23:17:12,945 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 62 [2019-10-14 23:17:12,946 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:12,982 INFO L567 ElimStorePlain]: treesize reduction 70, result has 42.1 percent of original size [2019-10-14 23:17:12,983 INFO L464 ElimStorePlain]: Eliminatee v_prenex_2 vanished before elimination [2019-10-14 23:17:12,983 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:12,983 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:125, output treesize:51 [2019-10-14 23:17:13,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:13,099 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:17:13,101 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:17:13,102 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:17:13,127 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 112 [2019-10-14 23:17:13,128 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:13,140 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 23:17:13,140 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:13,172 INFO L567 ElimStorePlain]: treesize reduction 5, result has 94.8 percent of original size [2019-10-14 23:17:13,172 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:13,172 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:207, output treesize:92 [2019-10-14 23:17:13,343 INFO L341 Elim1Store]: treesize reduction 124, result has 12.1 percent of original size [2019-10-14 23:17:13,344 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 88 [2019-10-14 23:17:13,345 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:13,361 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:13,362 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:13,362 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2019-10-14 23:17:15,554 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#C~0.base_BEFORE_CALL_2| Int) (|v_main_~#C~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.base_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#C~0.base_BEFORE_CALL_2|)) (.cse1 (select |c_#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|)) (.cse2 (select |c_#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|))) (and (not (= |v_main_~#C~0.base_BEFORE_CALL_2| |v_main_~#B~0.base_BEFORE_CALL_2|)) (= (select .cse0 (+ |v_main_~#C~0.offset_BEFORE_CALL_2| 8)) (+ (select .cse1 (+ |v_main_~#B~0.offset_BEFORE_CALL_2| 8)) (select .cse2 (+ |v_main_~#A~0.offset_BEFORE_CALL_2| 8)))) (= (select .cse0 (+ |v_main_~#C~0.offset_BEFORE_CALL_2| 4)) (+ (select .cse1 (+ |v_main_~#B~0.offset_BEFORE_CALL_2| 4)) (select .cse2 (+ |v_main_~#A~0.offset_BEFORE_CALL_2| 4)))) (= (select .cse0 |v_main_~#C~0.offset_BEFORE_CALL_2|) (+ (select .cse1 |v_main_~#B~0.offset_BEFORE_CALL_2|) (select .cse2 |v_main_~#A~0.offset_BEFORE_CALL_2|))) (not (= |v_main_~#A~0.base_BEFORE_CALL_2| |v_main_~#C~0.base_BEFORE_CALL_2|)) (not (= |v_main_~#A~0.base_BEFORE_CALL_2| |v_main_~#B~0.base_BEFORE_CALL_2|))))) is different from true [2019-10-14 23:17:17,982 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#C~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#C~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (let ((.cse2 (select |c_#memory_int| |v_main_~#C~0.base_BEFORE_CALL_3|)) (.cse1 (select |c_#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|)) (.cse0 (select |c_#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|))) (and (not (= |v_main_~#C~0.base_BEFORE_CALL_3| |v_main_~#B~0.base_BEFORE_CALL_3|)) (= (+ (select .cse0 |v_main_~#B~0.offset_BEFORE_CALL_3|) (select .cse1 |v_main_~#A~0.offset_BEFORE_CALL_3|)) (select .cse2 |v_main_~#C~0.offset_BEFORE_CALL_3|)) (not (= |v_main_~#A~0.base_BEFORE_CALL_3| |v_main_~#B~0.base_BEFORE_CALL_3|)) (not (= |v_main_~#A~0.base_BEFORE_CALL_3| |v_main_~#C~0.base_BEFORE_CALL_3|)) (= (select .cse2 (+ |v_main_~#C~0.offset_BEFORE_CALL_3| 8)) (+ (select .cse0 (+ |v_main_~#B~0.offset_BEFORE_CALL_3| 8)) (select .cse1 (+ |v_main_~#A~0.offset_BEFORE_CALL_3| 8)))) (= (select .cse2 (+ |v_main_~#C~0.offset_BEFORE_CALL_3| 4)) (+ (select .cse1 (+ |v_main_~#A~0.offset_BEFORE_CALL_3| 4)) (select .cse0 (+ |v_main_~#B~0.offset_BEFORE_CALL_3| 4))))))) is different from true [2019-10-14 23:17:18,216 INFO L341 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2019-10-14 23:17:18,217 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 9 case distinctions, treesize of input 91 treesize of output 25 [2019-10-14 23:17:18,217 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:18,224 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:18,225 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:18,226 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:103, output treesize:5 [2019-10-14 23:17:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2019-10-14 23:17:18,326 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:18,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2019-10-14 23:17:18,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976302210] [2019-10-14 23:17:18,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 23:17:18,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 23:17:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1353, Unknown=2, NotChecked=150, Total=1640 [2019-10-14 23:17:18,329 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 41 states. [2019-10-14 23:17:19,887 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2019-10-14 23:17:20,139 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2019-10-14 23:17:21,987 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2019-10-14 23:17:24,391 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2019-10-14 23:17:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:24,966 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2019-10-14 23:17:24,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-14 23:17:24,966 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 57 [2019-10-14 23:17:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:24,968 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:17:24,968 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:17:24,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=484, Invalid=3812, Unknown=2, NotChecked=258, Total=4556 [2019-10-14 23:17:24,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:17:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2019-10-14 23:17:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:17:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2019-10-14 23:17:24,997 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 57 [2019-10-14 23:17:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:24,998 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2019-10-14 23:17:24,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 23:17:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2019-10-14 23:17:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 23:17:25,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:25,002 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-10-14 23:17:25,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:25,213 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1892204120, now seen corresponding path program 5 times [2019-10-14 23:17:25,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:25,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656342635] [2019-10-14 23:17:25,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:25,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:25,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 23:17:25,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656342635] [2019-10-14 23:17:25,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100034355] [2019-10-14 23:17:25,483 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 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