/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/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:48:01,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:48:01,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:48:01,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:48:01,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:48:01,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:48:01,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:48:01,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:48:01,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:48:01,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:48:01,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:48:01,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:48:01,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:48:01,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:48:01,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:48:01,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:48:01,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:48:01,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:48:01,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:48:01,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:48:01,492 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 19:48:01,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:48:01,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:48:01,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:48:01,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:48:01,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:48:01,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:48:01,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:48:01,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:48:01,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:48:01,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:48:01,513 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:48:01,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:48:01,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:48:01,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:48:01,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:48:01,514 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:48:01,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:48:01,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:48:01,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:48:01,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:48:01,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:48:01,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:48:01,515 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:48:01,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:48:01,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:48:01,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:48:01,823 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:48:01,824 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:48:01,824 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-08-22 19:48:01,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3aa3078/868b702e1c844f0ab874d5efa564cd2c/FLAG96929b4d2 [2020-08-22 19:48:02,351 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:48:02,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-08-22 19:48:02,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3aa3078/868b702e1c844f0ab874d5efa564cd2c/FLAG96929b4d2 [2020-08-22 19:48:02,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3aa3078/868b702e1c844f0ab874d5efa564cd2c [2020-08-22 19:48:02,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:48:02,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:48:02,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:48:02,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:48:02,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:48:02,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:02,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1deee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02, skipping insertion in model container [2020-08-22 19:48:02,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:02,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:48:02,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:48:02,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:48:02,941 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:48:02,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:48:02,975 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:48:02,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02 WrapperNode [2020-08-22 19:48:02,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:48:02,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:48:02,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:48:02,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:48:02,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:02,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:02,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:02,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:02,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:03,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:03,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (1/1) ... [2020-08-22 19:48:03,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:48:03,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:48:03,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:48:03,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:48:03,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (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 19:48:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:48:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:48:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:48:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:48:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:48:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:48:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:48:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:48:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:48:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:48:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:48:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:48:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:48:03,363 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:48:03,363 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:48:03,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:48:03 BoogieIcfgContainer [2020-08-22 19:48:03,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:48:03,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:48:03,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:48:03,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:48:03,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:48:02" (1/3) ... [2020-08-22 19:48:03,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488c79f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:48:03, skipping insertion in model container [2020-08-22 19:48:03,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:02" (2/3) ... [2020-08-22 19:48:03,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488c79f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:48:03, skipping insertion in model container [2020-08-22 19:48:03,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:48:03" (3/3) ... [2020-08-22 19:48:03,376 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-08-22 19:48:03,388 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:48:03,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:48:03,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:48:03,432 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:48:03,433 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:48:03,433 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:48:03,433 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:48:03,433 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:48:03,433 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:48:03,433 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:48:03,434 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:48:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 19:48:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:48:03,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:03,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:03,459 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1930258608, now seen corresponding path program 1 times [2020-08-22 19:48:03,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:03,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263581123] [2020-08-22 19:48:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:03,533 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:03,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:03,602 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 19:48:03,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263581123] [2020-08-22 19:48:03,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:03,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:48:03,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896381181] [2020-08-22 19:48:03,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:48:03,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:48:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:48:03,630 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-08-22 19:48:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:03,655 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-08-22 19:48:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:48:03,656 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-08-22 19:48:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:03,664 INFO L225 Difference]: With dead ends: 48 [2020-08-22 19:48:03,664 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 19:48:03,668 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 19:48:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 19:48:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 19:48:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 19:48:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-08-22 19:48:03,705 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-08-22 19:48:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:03,706 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-08-22 19:48:03,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:48:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-08-22 19:48:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:48:03,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:03,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:03,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:48:03,708 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1900705936, now seen corresponding path program 1 times [2020-08-22 19:48:03,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:03,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589051901] [2020-08-22 19:48:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:03,712 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:03,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:03,761 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 19:48:03,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589051901] [2020-08-22 19:48:03,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:03,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:48:03,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944303105] [2020-08-22 19:48:03,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:48:03,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:03,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:48:03,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:48:03,765 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2020-08-22 19:48:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:03,804 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-08-22 19:48:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:48:03,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-22 19:48:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:03,807 INFO L225 Difference]: With dead ends: 29 [2020-08-22 19:48:03,807 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 19:48:03,809 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 19:48:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 19:48:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-22 19:48:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 19:48:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-08-22 19:48:03,818 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-08-22 19:48:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:03,819 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-08-22 19:48:03,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:48:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-08-22 19:48:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 19:48:03,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:03,820 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 19:48:03,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:48:03,821 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:03,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1024587775, now seen corresponding path program 1 times [2020-08-22 19:48:03,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:03,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722695773] [2020-08-22 19:48:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:06,089 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-08-22 19:48:06,133 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 19:48:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:06,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:06,222 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 19:48:06,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722695773] [2020-08-22 19:48:06,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:06,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:48:06,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954213750] [2020-08-22 19:48:06,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:48:06,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:48:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:48:06,272 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-08-22 19:48:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:06,328 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-08-22 19:48:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:48:06,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 19:48:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:06,330 INFO L225 Difference]: With dead ends: 38 [2020-08-22 19:48:06,331 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 19:48:06,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:48:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 19:48:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-22 19:48:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 19:48:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-08-22 19:48:06,339 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-08-22 19:48:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:06,339 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-08-22 19:48:06,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:48:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-08-22 19:48:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 19:48:06,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:06,340 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, 1, 1] [2020-08-22 19:48:06,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:48:06,341 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2065885280, now seen corresponding path program 1 times [2020-08-22 19:48:06,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:06,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945075996] [2020-08-22 19:48:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:06,348 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:06,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:06,390 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 19:48:06,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945075996] [2020-08-22 19:48:06,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:06,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:48:06,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590962304] [2020-08-22 19:48:06,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:48:06,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:06,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:48:06,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:48:06,393 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-08-22 19:48:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:06,424 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-08-22 19:48:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:48:06,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-22 19:48:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:06,426 INFO L225 Difference]: With dead ends: 37 [2020-08-22 19:48:06,427 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 19:48:06,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:48:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 19:48:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-22 19:48:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 19:48:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 19:48:06,437 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 19:48:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:06,437 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 19:48:06,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:48:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 19:48:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:48:06,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:06,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:06,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:48:06,440 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1729554991, now seen corresponding path program 2 times [2020-08-22 19:48:06,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:06,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065640653] [2020-08-22 19:48:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:09,100 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-08-22 19:48:09,117 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,170 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 19:48:09,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065640653] [2020-08-22 19:48:09,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:09,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:48:09,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127641739] [2020-08-22 19:48:09,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:48:09,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:48:09,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:48:09,174 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-08-22 19:48:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:09,239 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-22 19:48:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:48:09,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 19:48:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:09,241 INFO L225 Difference]: With dead ends: 50 [2020-08-22 19:48:09,241 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 19:48:09,242 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 19:48:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 19:48:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 19:48:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 19:48:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 19:48:09,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2020-08-22 19:48:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:09,250 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 19:48:09,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:48:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 19:48:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 19:48:09,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:09,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:09,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:48:09,252 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:09,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1385563474, now seen corresponding path program 3 times [2020-08-22 19:48:09,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:09,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959028649] [2020-08-22 19:48:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:11,424 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,491 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 19:48:11,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959028649] [2020-08-22 19:48:11,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:11,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:48:11,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208389813] [2020-08-22 19:48:11,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:48:11,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:11,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:48:11,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:48:11,494 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-08-22 19:48:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:11,604 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-08-22 19:48:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:48:11,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-08-22 19:48:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:11,606 INFO L225 Difference]: With dead ends: 52 [2020-08-22 19:48:11,608 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 19:48:11,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:48:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 19:48:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-22 19:48:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 19:48:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 19:48:11,628 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2020-08-22 19:48:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:11,629 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 19:48:11,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:48:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 19:48:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 19:48:11,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:11,630 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:11,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:48:11,634 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1422203027, now seen corresponding path program 4 times [2020-08-22 19:48:11,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:11,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594385382] [2020-08-22 19:48:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:11,651 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:11,748 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 19:48:11,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594385382] [2020-08-22 19:48:11,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:11,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:48:11,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627821636] [2020-08-22 19:48:11,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:48:11,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:11,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:48:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:48:11,751 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-08-22 19:48:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:11,896 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-08-22 19:48:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:48:11,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 19:48:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:11,899 INFO L225 Difference]: With dead ends: 54 [2020-08-22 19:48:11,899 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 19:48:11,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:48:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 19:48:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 19:48:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 19:48:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-22 19:48:11,917 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-08-22 19:48:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:11,917 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-22 19:48:11,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:48:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-22 19:48:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:48:11,921 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:11,921 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:11,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:48:11,921 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2021892204, now seen corresponding path program 5 times [2020-08-22 19:48:11,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:11,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978963812] [2020-08-22 19:48:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:14,061 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:14,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:14,194 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 19:48:14,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978963812] [2020-08-22 19:48:14,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:14,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:48:14,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120087215] [2020-08-22 19:48:14,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:48:14,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:48:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:48:14,198 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states. [2020-08-22 19:48:14,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:14,390 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-22 19:48:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:48:14,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-08-22 19:48:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:14,392 INFO L225 Difference]: With dead ends: 56 [2020-08-22 19:48:14,392 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 19:48:14,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:48:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 19:48:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-22 19:48:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 19:48:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-22 19:48:14,402 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2020-08-22 19:48:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:14,402 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-22 19:48:14,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:48:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-22 19:48:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 19:48:14,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:14,404 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:14,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:48:14,405 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash 377623979, now seen corresponding path program 6 times [2020-08-22 19:48:14,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:14,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063618977] [2020-08-22 19:48:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:14,414 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:14,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:14,514 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 19:48:14,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063618977] [2020-08-22 19:48:14,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:14,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:48:14,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528295260] [2020-08-22 19:48:14,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:48:14,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:48:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:48:14,517 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 10 states. [2020-08-22 19:48:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:14,721 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-22 19:48:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:48:14,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-08-22 19:48:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:14,722 INFO L225 Difference]: With dead ends: 58 [2020-08-22 19:48:14,723 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 19:48:14,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:48:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 19:48:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 19:48:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 19:48:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-22 19:48:14,732 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2020-08-22 19:48:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:14,733 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-22 19:48:14,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:48:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-22 19:48:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 19:48:14,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:14,734 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:14,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:48:14,735 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:14,735 INFO L82 PathProgramCache]: Analyzing trace with hash 783824682, now seen corresponding path program 7 times [2020-08-22 19:48:14,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:14,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996118895] [2020-08-22 19:48:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:14,744 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:14,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:14,883 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 19:48:14,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996118895] [2020-08-22 19:48:14,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:14,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:48:14,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841530431] [2020-08-22 19:48:14,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:48:14,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:14,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:48:14,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:48:14,886 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 11 states. [2020-08-22 19:48:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:15,113 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-22 19:48:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 19:48:15,114 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-22 19:48:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:15,115 INFO L225 Difference]: With dead ends: 60 [2020-08-22 19:48:15,115 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 19:48:15,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:48:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 19:48:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-22 19:48:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 19:48:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-22 19:48:15,131 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 37 [2020-08-22 19:48:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:15,132 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-22 19:48:15,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:48:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-22 19:48:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 19:48:15,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:15,137 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:15,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:48:15,138 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:15,138 INFO L82 PathProgramCache]: Analyzing trace with hash 300676329, now seen corresponding path program 8 times [2020-08-22 19:48:15,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:15,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358179595] [2020-08-22 19:48:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:15,153 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:15,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:15,316 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 19:48:15,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358179595] [2020-08-22 19:48:15,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:15,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:48:15,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656147671] [2020-08-22 19:48:15,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:48:15,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:15,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:48:15,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:48:15,319 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 12 states. [2020-08-22 19:48:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:15,596 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 19:48:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:48:15,599 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-08-22 19:48:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:15,600 INFO L225 Difference]: With dead ends: 62 [2020-08-22 19:48:15,600 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 19:48:15,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:48:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 19:48:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-22 19:48:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 19:48:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-22 19:48:15,609 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 39 [2020-08-22 19:48:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:15,612 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-22 19:48:15,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:48:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-22 19:48:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 19:48:15,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:15,613 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:15,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:48:15,614 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:15,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:15,614 INFO L82 PathProgramCache]: Analyzing trace with hash -148422936, now seen corresponding path program 9 times [2020-08-22 19:48:15,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:15,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638744207] [2020-08-22 19:48:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:15,622 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:15,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:15,768 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 19:48:15,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638744207] [2020-08-22 19:48:15,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:15,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:48:15,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756949122] [2020-08-22 19:48:15,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:48:15,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:15,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:48:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:48:15,771 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 13 states. [2020-08-22 19:48:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:16,096 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-22 19:48:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:48:16,096 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-22 19:48:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:16,098 INFO L225 Difference]: With dead ends: 64 [2020-08-22 19:48:16,098 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 19:48:16,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:48:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 19:48:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-22 19:48:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 19:48:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 19:48:16,107 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2020-08-22 19:48:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:16,108 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 19:48:16,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:48:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 19:48:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 19:48:16,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:16,109 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:16,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:48:16,109 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:16,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2058880295, now seen corresponding path program 10 times [2020-08-22 19:48:16,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:16,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347213914] [2020-08-22 19:48:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:16,118 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:16,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:16,176 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 19:48:16,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347213914] [2020-08-22 19:48:16,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:16,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:48:16,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688820707] [2020-08-22 19:48:16,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:48:16,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:16,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:48:16,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:48:16,178 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-08-22 19:48:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:16,209 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-08-22 19:48:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:48:16,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-08-22 19:48:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:16,210 INFO L225 Difference]: With dead ends: 60 [2020-08-22 19:48:16,210 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 19:48:16,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:48:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 19:48:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-08-22 19:48:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 19:48:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-08-22 19:48:16,221 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2020-08-22 19:48:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:16,221 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-08-22 19:48:16,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:48:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-08-22 19:48:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 19:48:16,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:16,223 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:16,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:48:16,223 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:16,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:16,224 INFO L82 PathProgramCache]: Analyzing trace with hash -135810616, now seen corresponding path program 11 times [2020-08-22 19:48:16,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:16,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593536914] [2020-08-22 19:48:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:16,233 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:16,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:16,282 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 19:48:16,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593536914] [2020-08-22 19:48:16,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:16,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:48:16,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194442108] [2020-08-22 19:48:16,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:48:16,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:16,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:48:16,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:48:16,285 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 5 states. [2020-08-22 19:48:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:16,306 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-08-22 19:48:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:48:16,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-08-22 19:48:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:16,307 INFO L225 Difference]: With dead ends: 71 [2020-08-22 19:48:16,307 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:48:16,308 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 19:48:16,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:48:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:48:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:48:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:48:16,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-08-22 19:48:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:16,309 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:48:16,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:48:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:48:16,310 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:48:16,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:48:16,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:48:16,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:48:16,592 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:48:16,592 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:48:16,592 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:48:16,592 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:48:16,593 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:48:16,593 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:16,593 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:16,593 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 19:48:16,593 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 19:48:16,594 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:16,594 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: false [2020-08-22 19:48:16,594 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 30) the Hoare annotation is: true [2020-08-22 19:48:16,594 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-08-22 19:48:16,595 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (or (= main_~k~0 4) (and (<= main_~i~0 0) (<= (+ main_~j~0 100) 0))) [2020-08-22 19:48:16,595 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (<= main_~i~0 0) [2020-08-22 19:48:16,595 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 19:48:16,595 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 30) the Hoare annotation is: true [2020-08-22 19:48:16,595 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-08-22 19:48:16,596 INFO L271 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-08-22 19:48:16,596 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= main_~k~0 4) [2020-08-22 19:48:16,596 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (= main_~k~0 4) (and (<= main_~i~0 0) (<= (+ main_~j~0 100) 0))) [2020-08-22 19:48:16,596 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-08-22 19:48:16,597 INFO L264 CegarLoopResult]: At program point L20-3(lines 20 22) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-08-22 19:48:16,597 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (<= main_~i~0 0) [2020-08-22 19:48:16,597 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= main_~k~0 4) [2020-08-22 19:48:16,597 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 19:48:16,597 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-08-22 19:48:16,598 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 19:48:16,598 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-08-22 19:48:16,598 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:48:16,598 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 19:48:16,598 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-08-22 19:48:16,598 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:48:16,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:48:16 BoogieIcfgContainer [2020-08-22 19:48:16,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:48:16,624 INFO L168 Benchmark]: Toolchain (without parser) took 13897.87 ms. Allocated memory was 137.9 MB in the beginning and 285.7 MB in the end (delta: 147.8 MB). Free memory was 101.1 MB in the beginning and 251.2 MB in the end (delta: -150.2 MB). Peak memory consumption was 125.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:16,625 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 118.9 MB in the beginning and 118.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-22 19:48:16,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.22 ms. Allocated memory is still 137.9 MB. Free memory was 100.7 MB in the beginning and 90.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:16,627 INFO L168 Benchmark]: Boogie Preprocessor took 27.86 ms. Allocated memory is still 137.9 MB. Free memory was 90.8 MB in the beginning and 89.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:16,627 INFO L168 Benchmark]: RCFGBuilder took 362.60 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 89.5 MB in the beginning and 167.6 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:16,628 INFO L168 Benchmark]: TraceAbstraction took 13252.73 ms. Allocated memory was 201.3 MB in the beginning and 285.7 MB in the end (delta: 84.4 MB). Free memory was 166.5 MB in the beginning and 251.2 MB in the end (delta: -84.7 MB). Peak memory consumption was 127.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:16,632 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 118.9 MB in the beginning and 118.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.22 ms. Allocated memory is still 137.9 MB. Free memory was 100.7 MB in the beginning and 90.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.86 ms. Allocated memory is still 137.9 MB. Free memory was 90.8 MB in the beginning and 89.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.60 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 89.5 MB in the beginning and 167.6 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13252.73 ms. Allocated memory was 201.3 MB in the beginning and 285.7 MB in the end (delta: 84.4 MB). Free memory was 166.5 MB in the beginning and 251.2 MB in the end (delta: -84.7 MB). Peak memory consumption was 127.4 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: 24]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: k == 4 || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: k == 4 || (i <= 0 && j + 100 <= 0) - 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: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.8s, OverallIterations: 14, TraceHistogramMax: 9, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 300 SDtfs, 136 SDslu, 1063 SDs, 0 SdLazy, 570 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 182 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 12 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 113 PreInvPairs, 187 NumberOfFragments, 90 HoareAnnotationTreeSize, 113 FomulaSimplifications, 5866 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 29 FomulaSimplificationsInter, 223 FormulaSimplificationTreeSizeReductionInter, 0.1s 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...