/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:48:06,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:48:06,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:48:06,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:48:06,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:48:06,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:48:06,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:48:06,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:48:06,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:48:06,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:48:06,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:48:06,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:48:06,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:48:06,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:48:06,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:48:06,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:48:06,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:48:06,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:48:06,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:48:06,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:48:06,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:48:06,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:48:06,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:48:06,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:48:06,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:48:06,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:48:06,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:48:06,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:48:06,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:48:06,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:48:06,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:48:06,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:48:06,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:48:06,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:48:06,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:48:06,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:48:06,797 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:48:06,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:48:06,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:48:06,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:48:06,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:48:06,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:48:06,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:48:06,799 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:48:07,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:48:07,110 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:48:07,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:48:07,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:48:07,116 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:48:07,117 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-08-22 19:48:07,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f0318d7/927e4ae88e8742428c3a8448b374bad9/FLAG868ee21ed [2020-08-22 19:48:07,635 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:48:07,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-08-22 19:48:07,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f0318d7/927e4ae88e8742428c3a8448b374bad9/FLAG868ee21ed [2020-08-22 19:48:08,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f0318d7/927e4ae88e8742428c3a8448b374bad9 [2020-08-22 19:48:08,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:48:08,015 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:48:08,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:48:08,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:48:08,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:48:08,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182b6862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08, skipping insertion in model container [2020-08-22 19:48:08,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:48:08,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:48:08,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:48:08,305 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:48:08,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:48:08,342 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:48:08,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08 WrapperNode [2020-08-22 19:48:08,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:48:08,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:48:08,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:48:08,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:48:08,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (1/1) ... [2020-08-22 19:48:08,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:48:08,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:48:08,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:48:08,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:48:08,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (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 19:48:08,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:48:08,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:48:08,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:48:08,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:48:08,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:48:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:48:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:48:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:48:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:48:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:48:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:48:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:48:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:48:08,722 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:48:08,722 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:48:08,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:48:08 BoogieIcfgContainer [2020-08-22 19:48:08,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:48:08,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:48:08,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:48:08,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:48:08,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:48:08" (1/3) ... [2020-08-22 19:48:08,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8924dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:48:08, skipping insertion in model container [2020-08-22 19:48:08,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:08" (2/3) ... [2020-08-22 19:48:08,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8924dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:48:08, skipping insertion in model container [2020-08-22 19:48:08,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:48:08" (3/3) ... [2020-08-22 19:48:08,735 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-08-22 19:48:08,747 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:48:08,755 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:48:08,771 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:48:08,818 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:48:08,818 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:48:08,818 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:48:08,819 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:48:08,819 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:48:08,819 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:48:08,819 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:48:08,819 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:48:08,843 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 19:48:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 19:48:08,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:08,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:08,858 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:08,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1007675669, now seen corresponding path program 1 times [2020-08-22 19:48:08,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:08,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391483440] [2020-08-22 19:48:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:08,949 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,021 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 19:48:09,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391483440] [2020-08-22 19:48:09,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:09,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:48:09,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395560341] [2020-08-22 19:48:09,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:48:09,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:09,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:48:09,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:48:09,050 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-08-22 19:48:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:09,078 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-08-22 19:48:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:48:09,080 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 19:48:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:09,090 INFO L225 Difference]: With dead ends: 42 [2020-08-22 19:48:09,090 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 19:48:09,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:48:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 19:48:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 19:48:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 19:48:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-22 19:48:09,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-08-22 19:48:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:09,132 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-22 19:48:09,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:48:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-22 19:48:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 19:48:09,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:09,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:09,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:48:09,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:09,135 INFO L82 PathProgramCache]: Analyzing trace with hash 993822854, now seen corresponding path program 1 times [2020-08-22 19:48:09,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:09,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726921639] [2020-08-22 19:48:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:09,138 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,232 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 19:48:09,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726921639] [2020-08-22 19:48:09,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:09,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:48:09,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326314885] [2020-08-22 19:48:09,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:48:09,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:09,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:48:09,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:48:09,238 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-08-22 19:48:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:09,316 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-22 19:48:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:48:09,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 19:48:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:09,320 INFO L225 Difference]: With dead ends: 39 [2020-08-22 19:48:09,321 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 19:48:09,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:48:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 19:48:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-08-22 19:48:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 19:48:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-22 19:48:09,350 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2020-08-22 19:48:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:09,350 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-22 19:48:09,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:48:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-22 19:48:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 19:48:09,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:09,353 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:09,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:48:09,354 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:09,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:09,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1988212296, now seen corresponding path program 1 times [2020-08-22 19:48:09,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:09,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870850917] [2020-08-22 19:48:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:09,362 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 19:48:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,497 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 19:48:09,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870850917] [2020-08-22 19:48:09,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:09,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:48:09,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329588080] [2020-08-22 19:48:09,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:48:09,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:09,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:48:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:48:09,500 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-08-22 19:48:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:09,599 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-08-22 19:48:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:48:09,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 19:48:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:09,603 INFO L225 Difference]: With dead ends: 54 [2020-08-22 19:48:09,604 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 19:48:09,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:48:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 19:48:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-08-22 19:48:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 19:48:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 19:48:09,616 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2020-08-22 19:48:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:09,617 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 19:48:09,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:48:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 19:48:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 19:48:09,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:09,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:09,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:48:09,619 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:09,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2096508511, now seen corresponding path program 1 times [2020-08-22 19:48:09,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:09,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287050901] [2020-08-22 19:48:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:09,640 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,703 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 19:48:09,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287050901] [2020-08-22 19:48:09,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:09,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:48:09,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832075081] [2020-08-22 19:48:09,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:48:09,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:48:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:48:09,705 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-08-22 19:48:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:09,769 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-08-22 19:48:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:48:09,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 19:48:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:09,771 INFO L225 Difference]: With dead ends: 41 [2020-08-22 19:48:09,771 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 19:48:09,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:48:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 19:48:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-08-22 19:48:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 19:48:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 19:48:09,782 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-08-22 19:48:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:09,782 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 19:48:09,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:48:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 19:48:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 19:48:09,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:09,784 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:09,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:48:09,785 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1883436929, now seen corresponding path program 1 times [2020-08-22 19:48:09,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:09,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180939492] [2020-08-22 19:48:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:11,034 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 19:48:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:48:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,155 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 19:48:11,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180939492] [2020-08-22 19:48:11,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:11,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:48:11,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23697674] [2020-08-22 19:48:11,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:48:11,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:11,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:48:11,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:48:11,283 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 19:48:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:11,369 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-08-22 19:48:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:48:11,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-22 19:48:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:11,371 INFO L225 Difference]: With dead ends: 40 [2020-08-22 19:48:11,371 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 19:48:11,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:48:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 19:48:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-08-22 19:48:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 19:48:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-08-22 19:48:11,380 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-08-22 19:48:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:11,381 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-08-22 19:48:11,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:48:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-08-22 19:48:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 19:48:11,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:11,382 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:11,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:48:11,383 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:11,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1649594383, now seen corresponding path program 1 times [2020-08-22 19:48:11,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:11,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801847830] [2020-08-22 19:48:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:11,388 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 19:48:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,475 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 19:48:11,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801847830] [2020-08-22 19:48:11,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:11,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:48:11,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561821068] [2020-08-22 19:48:11,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:48:11,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:48:11,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:48:11,483 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2020-08-22 19:48:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:11,569 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-08-22 19:48:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:48:11,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-22 19:48:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:11,570 INFO L225 Difference]: With dead ends: 33 [2020-08-22 19:48:11,570 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:48:11,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:48:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:48:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:48:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:48:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:48:11,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-22 19:48:11,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:11,576 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:48:11,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:48:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:48:11,577 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:48:11,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:48:11,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:48:11,976 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:48:11,976 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:48:11,976 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:48:11,977 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:48:11,977 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:48:11,977 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:48:11,977 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:11,978 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:11,978 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 19:48:11,978 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 19:48:11,978 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:11,978 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 26) the Hoare annotation is: true [2020-08-22 19:48:11,979 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (or (and (<= main_~n~0 0) (<= main_~x~0 0)) (and (<= 0 main_~m~0) (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0))) [2020-08-22 19:48:11,979 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 19:48:11,979 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 0)) [2020-08-22 19:48:11,980 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 .cse1 (<= main_~m~0 0) (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) .cse1))) [2020-08-22 19:48:11,980 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0))) (or (and .cse0 (<= main_~n~0 0) (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0)))) [2020-08-22 19:48:11,980 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 26) the Hoare annotation is: true [2020-08-22 19:48:11,981 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-08-22 19:48:11,981 INFO L271 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: true [2020-08-22 19:48:11,981 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 19:48:11,981 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 20) the Hoare annotation is: (and (<= 0 main_~m~0) (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 19:48:11,982 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (<= main_~m~0 0) (<= main_~x~0 0)) [2020-08-22 19:48:11,982 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 19:48:11,982 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (<= main_~m~0 0) (<= main_~x~0 0)) [2020-08-22 19:48:11,982 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (<= main_~m~0 0) (<= main_~x~0 0)) [2020-08-22 19:48:11,983 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 19:48:11,983 INFO L264 CegarLoopResult]: At program point L18-5(lines 18 20) the Hoare annotation is: (and (<= 0 main_~m~0) (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 19:48:11,983 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 19:48:11,983 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:48:11,983 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:48:11,984 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:48:11,984 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:48:11,984 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:48:12,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:48:12 BoogieIcfgContainer [2020-08-22 19:48:12,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:48:12,015 INFO L168 Benchmark]: Toolchain (without parser) took 3997.13 ms. Allocated memory was 142.1 MB in the beginning and 235.4 MB in the end (delta: 93.3 MB). Free memory was 102.9 MB in the beginning and 107.4 MB in the end (delta: -4.5 MB). Peak memory consumption was 88.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:12,016 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:48:12,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.00 ms. Allocated memory is still 142.1 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:12,025 INFO L168 Benchmark]: Boogie Preprocessor took 118.70 ms. Allocated memory was 142.1 MB in the beginning and 202.4 MB in the end (delta: 60.3 MB). Free memory was 93.3 MB in the beginning and 181.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:12,026 INFO L168 Benchmark]: RCFGBuilder took 263.98 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 167.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:12,027 INFO L168 Benchmark]: TraceAbstraction took 3281.44 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 167.3 MB in the beginning and 107.4 MB in the end (delta: 59.9 MB). Peak memory consumption was 93.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:12,041 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 142.1 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.00 ms. Allocated memory is still 142.1 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.70 ms. Allocated memory was 142.1 MB in the beginning and 202.4 MB in the end (delta: 60.3 MB). Free memory was 93.3 MB in the beginning and 181.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 263.98 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 167.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3281.44 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 167.3 MB in the beginning and 107.4 MB in the end (delta: 59.9 MB). Peak memory consumption was 93.0 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: (((0 <= m && 0 <= x) && m <= 0) && x <= 0) || ((0 <= m && m + 1 <= n) && 0 <= x) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.7s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 66 SDslu, 360 SDs, 0 SdLazy, 156 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, 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, 23 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 71 PreInvPairs, 109 NumberOfFragments, 248 HoareAnnotationTreeSize, 71 FomulaSimplifications, 272 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 29 FomulaSimplificationsInter, 147 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...