/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:38:36,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:38:36,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:38:36,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:38:36,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:38:36,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:38:36,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:38:36,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:38:36,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:38:36,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:38:36,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:38:36,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:38:36,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:38:36,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:38:36,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:38:36,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:38:36,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:38:36,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:38:36,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:38:36,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:38:36,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:38:36,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:38:36,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:38:36,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:38:36,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:38:36,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:38:36,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:38:36,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:38:36,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:38:36,585 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:38:36,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:38:36,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:38:36,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:38:36,593 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:38:36,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:38:36,593 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:38:36,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:38:36,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:38:36,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:38:36,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:38:36,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:38:36,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:38:36,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:38:36,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:38:36,596 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:38:36,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:38:36,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:38:36,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:38:36,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:38:36,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:38:36,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:38:36,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:38:36,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:38:36,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:38:36,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:38:36,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:38:36,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:38:36,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:38:36,887 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:38:36,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:38:36,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:38:36,905 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:38:36,906 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:38:36,907 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2019-11-06 18:38:36,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b901865/a878a36416e044b8bca62678db0697bf/FLAGb5c1bd10c [2019-11-06 18:38:37,427 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:38:37,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2019-11-06 18:38:37,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b901865/a878a36416e044b8bca62678db0697bf/FLAGb5c1bd10c [2019-11-06 18:38:37,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b901865/a878a36416e044b8bca62678db0697bf [2019-11-06 18:38:37,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:38:37,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:38:37,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:38:37,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:38:37,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:38:37,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:38:37" (1/1) ... [2019-11-06 18:38:37,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:37, skipping insertion in model container [2019-11-06 18:38:37,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:38:37" (1/1) ... [2019-11-06 18:38:37,840 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:38:37,868 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:38:38,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:38:38,109 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:38:38,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:38:38,236 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:38:38,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38 WrapperNode [2019-11-06 18:38:38,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:38:38,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:38:38,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:38:38,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:38:38,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (1/1) ... [2019-11-06 18:38:38,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (1/1) ... [2019-11-06 18:38:38,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (1/1) ... [2019-11-06 18:38:38,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (1/1) ... [2019-11-06 18:38:38,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (1/1) ... [2019-11-06 18:38:38,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (1/1) ... [2019-11-06 18:38:38,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (1/1) ... [2019-11-06 18:38:38,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:38:38,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:38:38,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:38:38,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:38:38,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:38:38,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:38:38,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:38:38,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:38:38,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:38:38,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:38:38,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:38:38,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:38:38,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-06 18:38:38,339 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:38:38,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:38:38,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:38:38,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:38:38,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:38:38,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:38:38,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:38:38,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:38:38,688 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:38:38,688 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-06 18:38:38,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:38:38 BoogieIcfgContainer [2019-11-06 18:38:38,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:38:38,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:38:38,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:38:38,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:38:38,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:38:37" (1/3) ... [2019-11-06 18:38:38,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1669f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:38:38, skipping insertion in model container [2019-11-06 18:38:38,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:38" (2/3) ... [2019-11-06 18:38:38,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1669f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:38:38, skipping insertion in model container [2019-11-06 18:38:38,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:38:38" (3/3) ... [2019-11-06 18:38:38,699 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2019-11-06 18:38:38,709 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:38:38,717 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:38:38,729 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:38:38,759 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:38:38,760 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:38:38,760 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:38:38,760 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:38:38,760 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:38:38,760 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:38:38,760 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:38:38,760 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:38:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-11-06 18:38:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:38:38,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:38,787 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:38,789 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:38,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1272746570, now seen corresponding path program 1 times [2019-11-06 18:38:38,803 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:38,804 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839876545] [2019-11-06 18:38:38,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:38,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839876545] [2019-11-06 18:38:39,001 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:39,001 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:38:39,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578706870] [2019-11-06 18:38:39,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:38:39,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:38:39,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:38:39,029 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-11-06 18:38:39,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:39,203 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-11-06 18:38:39,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:38:39,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:38:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:39,214 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:38:39,214 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:38:39,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:38:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:38:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 18:38:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:38:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-11-06 18:38:39,287 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-11-06 18:38:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:39,288 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-11-06 18:38:39,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:38:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-11-06 18:38:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:38:39,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:39,293 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:39,293 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1923539238, now seen corresponding path program 1 times [2019-11-06 18:38:39,294 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:39,295 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523366983] [2019-11-06 18:38:39,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:39,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523366983] [2019-11-06 18:38:39,471 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:39,477 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:38:39,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872994842] [2019-11-06 18:38:39,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:38:39,479 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:39,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:38:39,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:38:39,480 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 6 states. [2019-11-06 18:38:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:39,745 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2019-11-06 18:38:39,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:39,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-06 18:38:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:39,749 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:38:39,750 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:38:39,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:38:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-06 18:38:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 18:38:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-11-06 18:38:39,778 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2019-11-06 18:38:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:39,778 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-11-06 18:38:39,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:38:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-11-06 18:38:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:38:39,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:39,784 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:39,784 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash -772301532, now seen corresponding path program 1 times [2019-11-06 18:38:39,800 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:39,801 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220239454] [2019-11-06 18:38:39,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:38:39,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220239454] [2019-11-06 18:38:39,895 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:39,895 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:38:39,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911466060] [2019-11-06 18:38:39,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:38:39,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:39,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:38:39,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:38:39,897 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2019-11-06 18:38:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:40,083 INFO L93 Difference]: Finished difference Result 119 states and 157 transitions. [2019-11-06 18:38:40,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:38:40,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-11-06 18:38:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:40,086 INFO L225 Difference]: With dead ends: 119 [2019-11-06 18:38:40,086 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 18:38:40,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:38:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 18:38:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-06 18:38:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:38:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-11-06 18:38:40,109 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2019-11-06 18:38:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:40,109 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-11-06 18:38:40,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:38:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-11-06 18:38:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:38:40,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:40,111 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:40,112 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash -213249118, now seen corresponding path program 1 times [2019-11-06 18:38:40,113 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:40,113 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128046687] [2019-11-06 18:38:40,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:38:40,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128046687] [2019-11-06 18:38:40,239 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:40,239 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:38:40,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146528000] [2019-11-06 18:38:40,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:38:40,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:38:40,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:38:40,241 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 5 states. [2019-11-06 18:38:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:40,446 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2019-11-06 18:38:40,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:40,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-11-06 18:38:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:40,450 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:38:40,450 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:38:40,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:38:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:38:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2019-11-06 18:38:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:38:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-11-06 18:38:40,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 36 [2019-11-06 18:38:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:40,471 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-11-06 18:38:40,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:38:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-11-06 18:38:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:38:40,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:40,476 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:40,476 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 25817296, now seen corresponding path program 1 times [2019-11-06 18:38:40,477 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:40,477 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700726652] [2019-11-06 18:38:40,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:38:40,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700726652] [2019-11-06 18:38:40,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835824542] [2019-11-06 18:38:40,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:40,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:40,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:38:40,753 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:40,753 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:38:40,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50909083] [2019-11-06 18:38:40,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:38:40,754 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:40,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:38:40,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:40,755 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 7 states. [2019-11-06 18:38:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:40,964 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2019-11-06 18:38:40,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:40,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-11-06 18:38:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:40,966 INFO L225 Difference]: With dead ends: 103 [2019-11-06 18:38:40,966 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:38:40,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:38:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-06 18:38:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:38:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-11-06 18:38:40,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2019-11-06 18:38:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:40,976 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-11-06 18:38:40,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:38:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-11-06 18:38:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:38:40,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:40,977 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:41,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:41,187 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:41,188 INFO L82 PathProgramCache]: Analyzing trace with hash -95536050, now seen corresponding path program 2 times [2019-11-06 18:38:41,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:41,188 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947811421] [2019-11-06 18:38:41,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:38:41,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947811421] [2019-11-06 18:38:41,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039875404] [2019-11-06 18:38:41,315 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:41,372 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:38:41,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:41,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:41,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:38:41,417 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:41,418 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 18:38:41,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219058723] [2019-11-06 18:38:41,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:38:41,419 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:38:41,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:41,423 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 8 states. [2019-11-06 18:38:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:41,712 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2019-11-06 18:38:41,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:38:41,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-11-06 18:38:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:41,715 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:38:41,715 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:38:41,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:38:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:38:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2019-11-06 18:38:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:38:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-06 18:38:41,726 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2019-11-06 18:38:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:41,727 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-06 18:38:41,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:38:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-06 18:38:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:38:41,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:41,729 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:41,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:41,933 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1296186118, now seen corresponding path program 3 times [2019-11-06 18:38:41,934 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:41,934 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956764724] [2019-11-06 18:38:41,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:45,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956764724] [2019-11-06 18:38:45,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299271722] [2019-11-06 18:38:45,990 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:46,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:38:46,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:46,065 WARN L254 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 108 conjunts are in the unsatisfiable core [2019-11-06 18:38:46,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:07,627 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:07,628 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-06 18:39:07,629 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-06 18:39:07,639 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:07,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:07,645 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:39:07,645 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-11-06 18:39:07,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:07,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:08,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:08,424 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:08,425 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 60] total 103 [2019-11-06 18:39:08,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026412018] [2019-11-06 18:39:08,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-11-06 18:39:08,426 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:08,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-11-06 18:39:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=10180, Unknown=0, NotChecked=0, Total=10506 [2019-11-06 18:39:08,431 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 103 states.