/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 0.1.25-86f66a4 [2020-07-07 14:01:25,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:01:25,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:01:25,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-07 14:01:25,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:01:25,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:01:25,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:01:25,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:01:25,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:01:25,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:01:25,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:01:25,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:01:25,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:01:25,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:01:25,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:01:25,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:01:25,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:01:25,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:01:25,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:01:25,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:01:25,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:01:25,781 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:01:25,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:01:25,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:01:25,783 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:01:25,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:01:25,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:01:25,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:01:25,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:01:25,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:01:25,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:01:25,785 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:01:25,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:01:25,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:01:25,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:01:25,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:01:25,786 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:01:25,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:01:25,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:01:25,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:01:25,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:01:25,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:01:25,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:01:25,787 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:01:26,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:01:26,079 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:01:26,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:01:26,086 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:01:26,087 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:01:26,088 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-07 14:01:26,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ddc1231e/8c5c0ff01d144f48abe05eff0f5278e2/FLAGd5ee94d8f [2020-07-07 14:01:26,635 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:01:26,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-07 14:01:26,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ddc1231e/8c5c0ff01d144f48abe05eff0f5278e2/FLAGd5ee94d8f [2020-07-07 14:01:27,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ddc1231e/8c5c0ff01d144f48abe05eff0f5278e2 [2020-07-07 14:01:27,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:01:27,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:01:27,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:27,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:01:27,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:01:27,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3582de01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27, skipping insertion in model container [2020-07-07 14:01:27,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:01:27,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:01:27,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:27,292 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:01:27,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:27,319 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:01:27,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27 WrapperNode [2020-07-07 14:01:27,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:27,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:01:27,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:01:27,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:01:27,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (1/1) ... [2020-07-07 14:01:27,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:01:27,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:01:27,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:01:27,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:01:27,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (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 [2020-07-07 14:01:27,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:01:27,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:01:27,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:01:27,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:01:27,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:01:27,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:01:27,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:01:27,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:01:27,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:01:27,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:01:27,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:01:27,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:01:27,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:01:27,705 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:01:27,705 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 14:01:27,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:27 BoogieIcfgContainer [2020-07-07 14:01:27,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:01:27,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:01:27,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:01:27,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:01:27,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:01:27" (1/3) ... [2020-07-07 14:01:27,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f799e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:27, skipping insertion in model container [2020-07-07 14:01:27,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:27" (2/3) ... [2020-07-07 14:01:27,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f799e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:27, skipping insertion in model container [2020-07-07 14:01:27,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:27" (3/3) ... [2020-07-07 14:01:27,720 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-07 14:01:27,732 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:01:27,741 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:01:27,763 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:01:27,815 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:01:27,815 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:01:27,815 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:01:27,816 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:01:27,816 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:01:27,816 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:01:27,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:01:27,817 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:01:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-07 14:01:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 14:01:27,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:27,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:27,853 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1930258608, now seen corresponding path program 1 times [2020-07-07 14:01:27,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:27,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573537719] [2020-07-07 14:01:27,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:28,028 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:28,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573537719] [2020-07-07 14:01:28,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:28,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 14:01:28,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052879777] [2020-07-07 14:01:28,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 14:01:28,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 14:01:28,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:01:28,059 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-07-07 14:01:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:28,095 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-07-07 14:01:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 14:01:28,097 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-07 14:01:28,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:28,106 INFO L225 Difference]: With dead ends: 48 [2020-07-07 14:01:28,107 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 14:01:28,111 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 [2020-07-07 14:01:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 14:01:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-07 14:01:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 14:01:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-07-07 14:01:28,156 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-07-07 14:01:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:28,157 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-07-07 14:01:28,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 14:01:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-07-07 14:01:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 14:01:28,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:28,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:28,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:01:28,159 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:28,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1900705936, now seen corresponding path program 1 times [2020-07-07 14:01:28,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:28,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594461318] [2020-07-07 14:01:28,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:28,270 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:28,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594461318] [2020-07-07 14:01:28,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:28,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 14:01:28,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343096625] [2020-07-07 14:01:28,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 14:01:28,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:28,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 14:01:28,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 14:01:28,276 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2020-07-07 14:01:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:28,321 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-07 14:01:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 14:01:28,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-07 14:01:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:28,323 INFO L225 Difference]: With dead ends: 29 [2020-07-07 14:01:28,324 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 14:01:28,325 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 [2020-07-07 14:01:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 14:01:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-07 14:01:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 14:01:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-07 14:01:28,340 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-07-07 14:01:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:28,341 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-07 14:01:28,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 14:01:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-07 14:01:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 14:01:28,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:28,343 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] [2020-07-07 14:01:28,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:01:28,344 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1024587775, now seen corresponding path program 1 times [2020-07-07 14:01:28,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:28,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016814878] [2020-07-07 14:01:28,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 Garbage collection #3: 37 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 37 to 73 [2020-07-07 14:01:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:30,594 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:30,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016814878] [2020-07-07 14:01:30,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:30,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:01:30,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255214228] [2020-07-07 14:01:30,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:01:30,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:30,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:01:30,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:01:30,597 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-07-07 14:01:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:30,634 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-07-07 14:01:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 14:01:30,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-07 14:01:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:30,636 INFO L225 Difference]: With dead ends: 38 [2020-07-07 14:01:30,637 INFO L226 Difference]: Without dead ends: 26 [2020-07-07 14:01:30,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:01:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-07 14:01:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-07 14:01:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 14:01:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-07 14:01:30,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-07-07 14:01:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:30,646 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-07 14:01:30,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:01:30,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-07 14:01:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 14:01:30,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:30,648 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] [2020-07-07 14:01:30,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:01:30,649 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2065885280, now seen corresponding path program 1 times [2020-07-07 14:01:30,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:30,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453449882] [2020-07-07 14:01:30,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:30,726 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:30,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453449882] [2020-07-07 14:01:30,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:30,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 14:01:30,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232755379] [2020-07-07 14:01:30,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 14:01:30,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:30,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 14:01:30,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 14:01:30,729 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-07 14:01:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:30,769 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-07 14:01:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 14:01:30,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-07 14:01:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:30,771 INFO L225 Difference]: With dead ends: 37 [2020-07-07 14:01:30,771 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 14:01:30,772 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 [2020-07-07 14:01:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 14:01:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-07 14:01:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 14:01:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-07 14:01:30,780 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-07 14:01:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:30,780 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-07 14:01:30,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 14:01:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-07 14:01:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 14:01:30,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:30,782 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] [2020-07-07 14:01:30,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:01:30,783 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1729554991, now seen corresponding path program 2 times [2020-07-07 14:01:30,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:30,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530289610] [2020-07-07 14:01:30,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 Garbage collection #3: 37 nodes / 0 free / 0.001s / 0.001s total Resizing node table from 37 to 73 [2020-07-07 14:01:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:32,925 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:32,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530289610] [2020-07-07 14:01:32,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:32,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:01:32,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958832324] [2020-07-07 14:01:32,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:01:32,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:01:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:01:32,931 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-07-07 14:01:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:32,995 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-07 14:01:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 14:01:32,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-07 14:01:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:32,997 INFO L225 Difference]: With dead ends: 50 [2020-07-07 14:01:32,997 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 14:01:32,998 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 [2020-07-07 14:01:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 14:01:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-07 14:01:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 14:01:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-07 14:01:33,007 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2020-07-07 14:01:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:33,007 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-07 14:01:33,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:01:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-07 14:01:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 14:01:33,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:33,009 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] [2020-07-07 14:01:33,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:01:33,010 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1385563474, now seen corresponding path program 3 times [2020-07-07 14:01:33,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:33,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894210672] [2020-07-07 14:01:33,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 Garbage collection #3: 37 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 37 to 73 [2020-07-07 14:01:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:35,162 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:35,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894210672] [2020-07-07 14:01:35,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:35,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:01:35,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897549668] [2020-07-07 14:01:35,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:01:35,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:35,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:01:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:01:35,168 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-07 14:01:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:35,283 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-07-07 14:01:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 14:01:35,284 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-07-07 14:01:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:35,285 INFO L225 Difference]: With dead ends: 52 [2020-07-07 14:01:35,285 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 14:01:35,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:01:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 14:01:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-07 14:01:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-07 14:01:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-07 14:01:35,295 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2020-07-07 14:01:35,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:35,295 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-07 14:01:35,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:01:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-07 14:01:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 14:01:35,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:35,297 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] [2020-07-07 14:01:35,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:01:35,297 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1422203027, now seen corresponding path program 4 times [2020-07-07 14:01:35,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:35,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042129361] [2020-07-07 14:01:35,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:35,391 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:35,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042129361] [2020-07-07 14:01:35,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:35,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:01:35,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078087081] [2020-07-07 14:01:35,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:01:35,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:35,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:01:35,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:01:35,394 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-07-07 14:01:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:35,536 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-07-07 14:01:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 14:01:35,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-07-07 14:01:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:35,538 INFO L225 Difference]: With dead ends: 54 [2020-07-07 14:01:35,538 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 14:01:35,538 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 [2020-07-07 14:01:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 14:01:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-07 14:01:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 14:01:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-07-07 14:01:35,546 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-07-07 14:01:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:35,547 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-07-07 14:01:35,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:01:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-07-07 14:01:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 14:01:35,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:35,549 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] [2020-07-07 14:01:35,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:01:35,549 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2021892204, now seen corresponding path program 5 times [2020-07-07 14:01:35,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:35,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586153296] [2020-07-07 14:01:35,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 Garbage collection #3: 37 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 37 to 73 [2020-07-07 14:01:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:37,703 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:37,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586153296] [2020-07-07 14:01:37,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:37,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:01:37,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459913364] [2020-07-07 14:01:37,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:01:37,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:37,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:01:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:01:37,705 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states. [2020-07-07 14:01:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:37,866 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-07-07 14:01:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:01:37,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-07-07 14:01:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:37,868 INFO L225 Difference]: With dead ends: 56 [2020-07-07 14:01:37,868 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 14:01:37,869 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 [2020-07-07 14:01:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 14:01:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-07 14:01:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 14:01:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-07 14:01:37,876 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2020-07-07 14:01:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:37,877 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-07 14:01:37,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:01:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-07 14:01:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 14:01:37,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:37,878 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] [2020-07-07 14:01:37,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 14:01:37,879 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:37,880 INFO L82 PathProgramCache]: Analyzing trace with hash 377623979, now seen corresponding path program 6 times [2020-07-07 14:01:37,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:37,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396166569] [2020-07-07 14:01:37,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:37,992 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:37,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396166569] [2020-07-07 14:01:37,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:37,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:01:37,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992433856] [2020-07-07 14:01:37,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:01:37,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:37,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:01:37,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:01:37,995 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 10 states. [2020-07-07 14:01:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:38,223 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-07-07 14:01:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 14:01:38,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-07-07 14:01:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:38,225 INFO L225 Difference]: With dead ends: 58 [2020-07-07 14:01:38,226 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 14:01:38,226 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 [2020-07-07 14:01:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 14:01:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-07 14:01:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 14:01:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-07 14:01:38,241 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2020-07-07 14:01:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:38,242 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-07 14:01:38,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:01:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-07 14:01:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 14:01:38,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:38,244 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] [2020-07-07 14:01:38,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 14:01:38,244 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:38,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 783824682, now seen corresponding path program 7 times [2020-07-07 14:01:38,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:38,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98125614] [2020-07-07 14:01:38,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:38,376 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:38,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98125614] [2020-07-07 14:01:38,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:38,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:01:38,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828983281] [2020-07-07 14:01:38,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:01:38,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:01:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:01:38,378 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 11 states. [2020-07-07 14:01:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:38,655 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-07-07 14:01:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 14:01:38,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-07 14:01:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:38,657 INFO L225 Difference]: With dead ends: 60 [2020-07-07 14:01:38,657 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 14:01:38,659 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 [2020-07-07 14:01:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 14:01:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-07 14:01:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 14:01:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-07-07 14:01:38,666 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 37 [2020-07-07 14:01:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:38,667 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-07-07 14:01:38,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:01:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-07-07 14:01:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 14:01:38,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:38,668 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] [2020-07-07 14:01:38,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 14:01:38,669 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash 300676329, now seen corresponding path program 8 times [2020-07-07 14:01:38,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:38,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720629950] [2020-07-07 14:01:38,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:38,822 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:38,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720629950] [2020-07-07 14:01:38,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:38,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:01:38,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720108551] [2020-07-07 14:01:38,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:01:38,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:01:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:01:38,825 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 12 states. [2020-07-07 14:01:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:39,088 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-07 14:01:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:01:39,088 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-07 14:01:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:39,089 INFO L225 Difference]: With dead ends: 62 [2020-07-07 14:01:39,090 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 14:01:39,090 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 [2020-07-07 14:01:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 14:01:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-07 14:01:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 14:01:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-07 14:01:39,098 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 39 [2020-07-07 14:01:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:39,099 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-07 14:01:39,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:01:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-07 14:01:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 14:01:39,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:39,100 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] [2020-07-07 14:01:39,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 14:01:39,100 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:39,101 INFO L82 PathProgramCache]: Analyzing trace with hash -148422936, now seen corresponding path program 9 times [2020-07-07 14:01:39,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:39,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69487957] [2020-07-07 14:01:39,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:39,251 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:39,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69487957] [2020-07-07 14:01:39,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:39,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:01:39,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275860584] [2020-07-07 14:01:39,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:01:39,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:39,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:01:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:01:39,253 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 13 states. [2020-07-07 14:01:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:39,587 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-07-07 14:01:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:01:39,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-07 14:01:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:39,589 INFO L225 Difference]: With dead ends: 64 [2020-07-07 14:01:39,590 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 14:01:39,591 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 [2020-07-07 14:01:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 14:01:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-07 14:01:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 14:01:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-07 14:01:39,600 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2020-07-07 14:01:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:39,600 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-07 14:01:39,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:01:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-07 14:01:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 14:01:39,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:39,602 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] [2020-07-07 14:01:39,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 14:01:39,602 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:39,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2058880295, now seen corresponding path program 10 times [2020-07-07 14:01:39,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:39,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609685948] [2020-07-07 14:01:39,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:39,655 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:39,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609685948] [2020-07-07 14:01:39,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:39,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:01:39,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786227361] [2020-07-07 14:01:39,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:01:39,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:39,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:01:39,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:01:39,657 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-07-07 14:01:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:39,694 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-07 14:01:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 14:01:39,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-07-07 14:01:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:39,696 INFO L225 Difference]: With dead ends: 60 [2020-07-07 14:01:39,696 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 14:01:39,697 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 [2020-07-07 14:01:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 14:01:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-07-07 14:01:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 14:01:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-07-07 14:01:39,706 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2020-07-07 14:01:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:39,707 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-07-07 14:01:39,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:01:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-07-07 14:01:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-07 14:01:39,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:39,708 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] [2020-07-07 14:01:39,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 14:01:39,709 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash -135810616, now seen corresponding path program 11 times [2020-07-07 14:01:39,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:39,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582052961] [2020-07-07 14:01:39,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:39,782 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:39,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582052961] [2020-07-07 14:01:39,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:39,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:01:39,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57420397] [2020-07-07 14:01:39,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:01:39,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:01:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:01:39,784 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 5 states. [2020-07-07 14:01:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:39,806 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-07-07 14:01:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 14:01:39,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-07-07 14:01:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:39,807 INFO L225 Difference]: With dead ends: 71 [2020-07-07 14:01:39,807 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 14:01:39,808 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 [2020-07-07 14:01:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 14:01:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 14:01:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 14:01:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 14:01:39,809 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-07-07 14:01:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:39,810 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 14:01:39,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:01:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 14:01:39,810 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 14:01:39,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 14:01:39,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 14:01:40,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:01:40,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:01:40,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:01:40,089 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 14:01:40,095 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 14:01:40,095 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:01:40,095 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:40,095 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:40,096 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-07 14:01:40,096 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-07-07 14:01:40,096 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:40,096 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: false [2020-07-07 14:01:40,096 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 30) the Hoare annotation is: true [2020-07-07 14:01:40,096 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-07 14:01:40,097 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (or (and (<= main_~i~0 0) (<= (+ main_~j~0 100) 0)) (= 4 main_~k~0)) [2020-07-07 14:01:40,097 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (<= main_~i~0 0) [2020-07-07 14:01:40,097 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-07-07 14:01:40,097 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 30) the Hoare annotation is: true [2020-07-07 14:01:40,097 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-07 14:01:40,097 INFO L271 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-07-07 14:01:40,097 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-07 14:01:40,098 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (and (<= main_~i~0 0) (<= (+ main_~j~0 100) 0)) (= 4 main_~k~0)) [2020-07-07 14:01:40,098 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-07 14:01:40,098 INFO L264 CegarLoopResult]: At program point L20-3(lines 20 22) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-07 14:01:40,098 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (<= main_~i~0 0) [2020-07-07 14:01:40,098 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-07 14:01:40,098 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-07-07 14:01:40,099 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-07-07 14:01:40,099 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-07 14:01:40,099 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-07-07 14:01:40,099 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:01:40,099 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:01:40,099 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-07-07 14:01:40,100 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:01:40,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 02:01:40 BoogieIcfgContainer [2020-07-07 14:01:40,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 14:01:40,125 INFO L168 Benchmark]: Toolchain (without parser) took 13054.92 ms. Allocated memory was 137.9 MB in the beginning and 271.6 MB in the end (delta: 133.7 MB). Free memory was 101.4 MB in the beginning and 244.0 MB in the end (delta: -142.6 MB). Peak memory consumption was 113.6 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:40,126 INFO L168 Benchmark]: CDTParser took 1.06 ms. Allocated memory is still 137.9 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 14:01:40,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.71 ms. Allocated memory is still 137.9 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:40,128 INFO L168 Benchmark]: Boogie Preprocessor took 108.48 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 181.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:40,129 INFO L168 Benchmark]: RCFGBuilder took 281.09 ms. Allocated memory is still 201.9 MB. Free memory was 181.6 MB in the beginning and 168.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:40,130 INFO L168 Benchmark]: TraceAbstraction took 12411.23 ms. Allocated memory was 201.9 MB in the beginning and 271.6 MB in the end (delta: 69.7 MB). Free memory was 167.4 MB in the beginning and 244.0 MB in the end (delta: -76.6 MB). Peak memory consumption was 115.7 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:40,133 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.06 ms. Allocated memory is still 137.9 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.71 ms. Allocated memory is still 137.9 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.48 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 181.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.09 ms. Allocated memory is still 201.9 MB. Free memory was 181.6 MB in the beginning and 168.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12411.23 ms. Allocated memory was 201.9 MB in the beginning and 271.6 MB in the end (delta: 69.7 MB). Free memory was 167.4 MB in the beginning and 244.0 MB in the end (delta: -76.6 MB). Peak memory consumption was 115.7 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: 4 == k - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 4 == k || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (i <= 0 && j + 100 <= 0) || 4 == k - 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: 12.0s, OverallIterations: 14, TraceHistogramMax: 9, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 135 SDslu, 1052 SDs, 0 SdLazy, 561 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s 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, 5869 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 29 FomulaSimplificationsInter, 226 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...