/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/loop-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:57:56,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:57:56,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:57:56,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:57:56,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:57:56,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:57:56,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:57:56,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:57:56,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:57:56,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:57:56,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:57:56,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:57:56,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:57:56,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:57:56,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:57:56,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:57:56,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:57:56,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:57:56,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:57:56,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:57:56,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:57:56,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:57:56,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:57:56,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:57:56,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:57:56,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:57:56,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:57:56,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:57:56,643 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 [2020-08-22 16:57:56,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:57:56,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:57:56,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:57:56,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:57:56,666 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:57:56,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:57:56,666 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:57:56,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:57:56,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:57:56,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:57:56,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:57:56,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:57:56,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:57:56,668 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:57:56,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:57:56,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:57:56,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:57:56,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:57:56,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:57:56,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:57:56,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:57:56,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:57:56,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:57:56,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:57:56,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:57:56,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:57:56,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:57:56,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:57:56,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:57:56,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:57:56,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:57:57,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:57:57,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:57:57,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:57:57,016 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:57:57,016 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-08-22 16:57:57,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77c6079e0/0974e607ee87440bb6ad5c4219a5c7c2/FLAG0491aa406 [2020-08-22 16:57:57,504 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:57:57,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-08-22 16:57:57,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77c6079e0/0974e607ee87440bb6ad5c4219a5c7c2/FLAG0491aa406 [2020-08-22 16:57:57,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77c6079e0/0974e607ee87440bb6ad5c4219a5c7c2 [2020-08-22 16:57:57,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:57:57,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:57:57,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:57,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:57:57,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:57:57,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:57" (1/1) ... [2020-08-22 16:57:57,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2f7fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:57, skipping insertion in model container [2020-08-22 16:57:57,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:57" (1/1) ... [2020-08-22 16:57:57,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:57:57,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:57:58,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:58,110 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:57:58,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:58,140 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:57:58,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58 WrapperNode [2020-08-22 16:57:58,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:58,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:57:58,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:57:58,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:57:58,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (1/1) ... [2020-08-22 16:57:58,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (1/1) ... [2020-08-22 16:57:58,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (1/1) ... [2020-08-22 16:57:58,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (1/1) ... [2020-08-22 16:57:58,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (1/1) ... [2020-08-22 16:57:58,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (1/1) ... [2020-08-22 16:57:58,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (1/1) ... [2020-08-22 16:57:58,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:57:58,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:57:58,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:57:58,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:57:58,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (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 [2020-08-22 16:57:58,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:57:58,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:57:58,305 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:57:58,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:57:58,306 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:57:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:57:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:57:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:57:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:57:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:57:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:57:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:57:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:57:58,465 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:57:58,465 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:57:58,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:58 BoogieIcfgContainer [2020-08-22 16:57:58,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:57:58,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:57:58,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:57:58,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:57:58,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:57:57" (1/3) ... [2020-08-22 16:57:58,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4287d0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:58, skipping insertion in model container [2020-08-22 16:57:58,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:58" (2/3) ... [2020-08-22 16:57:58,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4287d0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:58, skipping insertion in model container [2020-08-22 16:57:58,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:58" (3/3) ... [2020-08-22 16:57:58,478 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2020-08-22 16:57:58,489 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:57:58,497 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:57:58,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:57:58,540 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:57:58,541 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:57:58,541 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:57:58,541 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:57:58,541 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:57:58,541 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:57:58,541 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:57:58,542 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:57:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-22 16:57:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 16:57:58,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:58,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:58,580 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:58,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:58,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1782755915, now seen corresponding path program 1 times [2020-08-22 16:57:58,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:58,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492481896] [2020-08-22 16:57:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:58,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:58,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492481896] [2020-08-22 16:57:58,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:58,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:57:58,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069314037] [2020-08-22 16:57:58,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:57:58,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:58,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:57:58,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:57:58,808 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-08-22 16:57:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:58,852 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-08-22 16:57:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:57:58,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-22 16:57:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:58,866 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:57:58,867 INFO L226 Difference]: Without dead ends: 12 [2020-08-22 16:57:58,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:57:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-22 16:57:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-22 16:57:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-22 16:57:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-08-22 16:57:58,907 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-08-22 16:57:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:58,907 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-08-22 16:57:58,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:57:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-08-22 16:57:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 16:57:58,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:58,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:58,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:57:58,909 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash 604679234, now seen corresponding path program 1 times [2020-08-22 16:57:58,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:58,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990682222] [2020-08-22 16:57:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:58,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:58,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990682222] [2020-08-22 16:57:58,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214280123] [2020-08-22 16:57:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:58,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:57:58,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:59,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:59,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-08-22 16:57:59,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039591842] [2020-08-22 16:57:59,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:59,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:59,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:59,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:59,097 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-08-22 16:57:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:59,125 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-08-22 16:57:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:57:59,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-22 16:57:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:59,127 INFO L225 Difference]: With dead ends: 18 [2020-08-22 16:57:59,127 INFO L226 Difference]: Without dead ends: 13 [2020-08-22 16:57:59,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-22 16:57:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-22 16:57:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-22 16:57:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-22 16:57:59,134 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-22 16:57:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:59,135 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-22 16:57:59,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-22 16:57:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 16:57:59,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:59,136 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:59,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:57:59,351 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:59,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1600724821, now seen corresponding path program 2 times [2020-08-22 16:57:59,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:59,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681104762] [2020-08-22 16:57:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:59,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:59,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681104762] [2020-08-22 16:57:59,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883053670] [2020-08-22 16:57:59,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 16:57:59,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:57:59,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:59,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:57:59,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:59,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:59,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-08-22 16:57:59,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146925091] [2020-08-22 16:57:59,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:57:59,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:59,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:57:59,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:59,527 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2020-08-22 16:57:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:59,544 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-22 16:57:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:59,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-08-22 16:57:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:59,546 INFO L225 Difference]: With dead ends: 19 [2020-08-22 16:57:59,546 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 16:57:59,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 16:57:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 16:57:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 16:57:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-22 16:57:59,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-22 16:57:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:59,552 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-22 16:57:59,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:57:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-22 16:57:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:57:59,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:59,554 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:59,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:59,768 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1881600350, now seen corresponding path program 3 times [2020-08-22 16:57:59,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:59,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047261525] [2020-08-22 16:57:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:59,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:59,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047261525] [2020-08-22 16:57:59,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825781067] [2020-08-22 16:57:59,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-08-22 16:57:59,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 16:57:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:59,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:57:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:59,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:59,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-08-22 16:57:59,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417892139] [2020-08-22 16:57:59,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:57:59,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:57:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:59,951 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2020-08-22 16:57:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:59,974 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-08-22 16:57:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:57:59,975 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-08-22 16:57:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:59,976 INFO L225 Difference]: With dead ends: 20 [2020-08-22 16:57:59,976 INFO L226 Difference]: Without dead ends: 15 [2020-08-22 16:57:59,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-22 16:57:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-22 16:57:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 16:57:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-22 16:57:59,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-08-22 16:57:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:59,982 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-22 16:57:59,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:57:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-22 16:57:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:57:59,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:59,983 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:00,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:00,199 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1835469045, now seen corresponding path program 4 times [2020-08-22 16:58:00,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:00,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357073102] [2020-08-22 16:58:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:00,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:00,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357073102] [2020-08-22 16:58:00,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603247893] [2020-08-22 16:58:00,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-08-22 16:58:00,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:58:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:00,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:58:00,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:00,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:58:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:00,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:00,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-08-22 16:58:00,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665056253] [2020-08-22 16:58:00,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:58:00,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:58:00,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:58:00,465 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2020-08-22 16:58:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:00,530 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-22 16:58:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:58:00,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-08-22 16:58:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:00,531 INFO L225 Difference]: With dead ends: 21 [2020-08-22 16:58:00,531 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 16:58:00,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:58:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 16:58:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-22 16:58:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-22 16:58:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-22 16:58:00,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-08-22 16:58:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:00,537 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-22 16:58:00,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:58:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-22 16:58:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:58:00,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:00,538 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:00,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:00,749 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503298, now seen corresponding path program 5 times [2020-08-22 16:58:00,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:00,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33454932] [2020-08-22 16:58:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:00,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:00,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33454932] [2020-08-22 16:58:00,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:58:00,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:58:00,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895139801] [2020-08-22 16:58:00,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:58:00,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:00,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:58:00,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:58:00,836 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-08-22 16:58:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:00,856 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-08-22 16:58:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:58:00,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-22 16:58:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:00,858 INFO L225 Difference]: With dead ends: 16 [2020-08-22 16:58:00,858 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:58:00,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:58:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:58:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:58:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:58:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:58:00,861 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-08-22 16:58:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:00,861 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:58:00,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:58:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:58:00,862 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:58:00,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:58:00,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:58:01,009 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:58:01,010 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:58:01,010 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:58:01,010 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:58:01,010 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:58:01,010 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:58:01,011 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 16:58:01,011 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 16:58:01,011 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-22 16:58:01,011 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 16:58:01,011 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-08-22 16:58:01,012 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-08-22 16:58:01,012 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-22 16:58:01,012 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (or (and (<= main_~j~0 6) (<= (+ main_~j~0 3) main_~i~0) (<= 6 main_~j~0)) (and (<= 10 main_~j~0) (<= main_~j~0 (+ main_~i~0 9)) (<= main_~i~0 1)) (and (<= main_~j~0 (+ main_~i~0 3)) (<= main_~i~0 5) (<= 8 main_~j~0)) (and (<= main_~j~0 (+ main_~i~0 6)) (<= main_~i~0 3) (<= 9 main_~j~0)) (and (<= 7 main_~j~0) (<= main_~i~0 7) (<= main_~j~0 main_~i~0))) [2020-08-22 16:58:01,012 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 20) the Hoare annotation is: (and (<= main_~j~0 6) (<= 6 main_~j~0)) [2020-08-22 16:58:01,012 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-08-22 16:58:01,013 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 16:58:01,013 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-22 16:58:01,013 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-22 16:58:01,013 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-22 16:58:01,013 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-22 16:58:01,013 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-22 16:58:01,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:58:01 BoogieIcfgContainer [2020-08-22 16:58:01,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:58:01,035 INFO L168 Benchmark]: Toolchain (without parser) took 3173.74 ms. Allocated memory was 141.0 MB in the beginning and 233.3 MB in the end (delta: 92.3 MB). Free memory was 104.6 MB in the beginning and 148.0 MB in the end (delta: -43.5 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:01,036 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:58:01,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.10 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 94.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:01,038 INFO L168 Benchmark]: Boogie Preprocessor took 106.46 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.9 MB in the beginning and 182.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:01,039 INFO L168 Benchmark]: RCFGBuilder took 221.15 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:01,040 INFO L168 Benchmark]: TraceAbstraction took 2561.62 ms. Allocated memory was 203.4 MB in the beginning and 233.3 MB in the end (delta: 29.9 MB). Free memory was 169.8 MB in the beginning and 148.0 MB in the end (delta: 21.7 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:01,044 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.10 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 94.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.46 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.9 MB in the beginning and 182.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 221.15 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2561.62 ms. Allocated memory was 203.4 MB in the beginning and 233.3 MB in the end (delta: 29.9 MB). Free memory was 169.8 MB in the beginning and 148.0 MB in the end (delta: 21.7 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((j <= 6 && j + 3 <= i) && 6 <= j) || ((10 <= j && j <= i + 9) && i <= 1)) || ((j <= i + 3 && i <= 5) && 8 <= j)) || ((j <= i + 6 && i <= 3) && 9 <= j)) || ((7 <= j && i <= 7) && j <= i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 2 SDslu, 164 SDs, 0 SdLazy, 96 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 71 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 3685 SizeOfPredicates, 8 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 15/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...