/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:32:16,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:32:16,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:32:16,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:32:16,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:32:16,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:32:16,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:32:16,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:32:16,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:32:16,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:32:16,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:32:16,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:32:16,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:32:16,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:32:16,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:32:16,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:32:16,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:32:16,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:32:16,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:32:16,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:32:16,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:32:16,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:32:16,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:32:16,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:32:16,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:32:16,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:32:16,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:32:16,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:32:16,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:32:16,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 23:32:16,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:32:16,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:32:16,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:32:16,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:32:16,783 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:32:16,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:32:16,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:32:16,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:32:16,785 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:32:16,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:32:16,785 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:32:16,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:32:16,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:32:16,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:32:16,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:32:16,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:32:16,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:32:16,786 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:32:16,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:32:16,787 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:32:16,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:32:16,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:32:16,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:32:16,788 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:32:16,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:32:16,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:32:16,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:32:16,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:32:16,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:32:16,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:32:16,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:32:16,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:32:16,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:32:16,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:32:17,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:32:17,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:32:17,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:32:17,126 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:32:17,128 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:32:17,129 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 23:32:17,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f169b76a/f03d568a52d04dbfbe5a0a257e20d522/FLAGa9ff74659 [2020-08-18 23:32:17,616 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:32:17,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 23:32:17,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f169b76a/f03d568a52d04dbfbe5a0a257e20d522/FLAGa9ff74659 [2020-08-18 23:32:17,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f169b76a/f03d568a52d04dbfbe5a0a257e20d522 [2020-08-18 23:32:17,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:32:17,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:32:17,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:17,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:32:17,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:32:17,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:17" (1/1) ... [2020-08-18 23:32:17,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbd1661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:17, skipping insertion in model container [2020-08-18 23:32:17,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:17" (1/1) ... [2020-08-18 23:32:17,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:32:18,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:32:18,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:18,312 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:32:18,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:18,353 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:32:18,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18 WrapperNode [2020-08-18 23:32:18,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:18,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:32:18,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:32:18,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:32:18,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (1/1) ... [2020-08-18 23:32:18,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (1/1) ... [2020-08-18 23:32:18,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (1/1) ... [2020-08-18 23:32:18,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (1/1) ... [2020-08-18 23:32:18,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (1/1) ... [2020-08-18 23:32:18,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (1/1) ... [2020-08-18 23:32:18,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (1/1) ... [2020-08-18 23:32:18,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:32:18,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:32:18,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:32:18,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:32:18,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:32:18,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:32:18,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:32:18,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:32:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:32:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:32:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:32:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:32:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:32:18,914 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:32:18,914 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:32:18,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:18 BoogieIcfgContainer [2020-08-18 23:32:18,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:32:18,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:32:18,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:32:18,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:32:18,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:32:17" (1/3) ... [2020-08-18 23:32:18,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed8243b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:18, skipping insertion in model container [2020-08-18 23:32:18,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:18" (2/3) ... [2020-08-18 23:32:18,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed8243b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:18, skipping insertion in model container [2020-08-18 23:32:18,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:18" (3/3) ... [2020-08-18 23:32:18,927 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-18 23:32:18,938 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:32:18,944 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:32:18,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:32:18,984 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:32:18,984 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:32:18,984 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:32:18,984 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:32:18,984 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:32:18,985 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:32:18,985 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:32:18,985 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:32:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-18 23:32:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:32:19,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:19,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:19,014 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-18 23:32:19,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:19,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191664413] [2020-08-18 23:32:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:19,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191664413] [2020-08-18 23:32:19,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:19,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:19,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153184971] [2020-08-18 23:32:19,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:19,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:19,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:19,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,234 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-18 23:32:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:19,300 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-18 23:32:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:19,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 23:32:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:19,314 INFO L225 Difference]: With dead ends: 81 [2020-08-18 23:32:19,314 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 23:32:19,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 23:32:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-18 23:32:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 23:32:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-18 23:32:19,363 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-18 23:32:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:19,363 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-18 23:32:19,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-18 23:32:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:32:19,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:19,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:19,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:32:19,366 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:19,367 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-18 23:32:19,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:19,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559684627] [2020-08-18 23:32:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:19,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559684627] [2020-08-18 23:32:19,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:19,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:19,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240021671] [2020-08-18 23:32:19,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:19,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:19,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,434 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-18 23:32:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:19,462 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-18 23:32:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:19,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 23:32:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:19,465 INFO L225 Difference]: With dead ends: 107 [2020-08-18 23:32:19,465 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 23:32:19,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 23:32:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-18 23:32:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 23:32:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-18 23:32:19,478 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-18 23:32:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:19,479 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-18 23:32:19,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-18 23:32:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:32:19,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:19,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:19,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:32:19,481 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-18 23:32:19,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:19,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351498067] [2020-08-18 23:32:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:19,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351498067] [2020-08-18 23:32:19,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:19,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:19,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903008838] [2020-08-18 23:32:19,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:19,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:19,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:19,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,570 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-18 23:32:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:19,593 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-18 23:32:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:19,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 23:32:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:19,596 INFO L225 Difference]: With dead ends: 99 [2020-08-18 23:32:19,596 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 23:32:19,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 23:32:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-18 23:32:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 23:32:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-18 23:32:19,607 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-18 23:32:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:19,608 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-18 23:32:19,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-18 23:32:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:32:19,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:19,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:19,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:32:19,610 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:19,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:19,610 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-18 23:32:19,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:19,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097349818] [2020-08-18 23:32:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:19,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097349818] [2020-08-18 23:32:19,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:19,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:19,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321827639] [2020-08-18 23:32:19,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:19,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,657 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-18 23:32:19,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:19,678 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-18 23:32:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:19,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 23:32:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:19,681 INFO L225 Difference]: With dead ends: 124 [2020-08-18 23:32:19,681 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 23:32:19,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 23:32:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-18 23:32:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 23:32:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-18 23:32:19,694 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-18 23:32:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:19,695 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-18 23:32:19,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-18 23:32:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:32:19,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:19,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:19,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:32:19,697 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-18 23:32:19,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:19,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872421796] [2020-08-18 23:32:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:19,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872421796] [2020-08-18 23:32:19,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:19,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:19,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980234050] [2020-08-18 23:32:19,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:19,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:19,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,751 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-18 23:32:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:19,774 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-18 23:32:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:19,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 23:32:19,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:19,777 INFO L225 Difference]: With dead ends: 204 [2020-08-18 23:32:19,777 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 23:32:19,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 23:32:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-18 23:32:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 23:32:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-18 23:32:19,793 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-18 23:32:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:19,794 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-18 23:32:19,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-18 23:32:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:19,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:19,796 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] [2020-08-18 23:32:19,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:32:19,796 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-18 23:32:19,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:19,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291849415] [2020-08-18 23:32:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:19,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291849415] [2020-08-18 23:32:19,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:19,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:19,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548973624] [2020-08-18 23:32:19,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:19,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,860 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-18 23:32:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:19,901 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-18 23:32:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:19,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:19,904 INFO L225 Difference]: With dead ends: 183 [2020-08-18 23:32:19,904 INFO L226 Difference]: Without dead ends: 126 [2020-08-18 23:32:19,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-18 23:32:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-18 23:32:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 23:32:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-18 23:32:19,928 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-18 23:32:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:19,929 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-18 23:32:19,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-18 23:32:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:19,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:19,930 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] [2020-08-18 23:32:19,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:32:19,934 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-18 23:32:19,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:19,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044395574] [2020-08-18 23:32:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044395574] [2020-08-18 23:32:20,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314216838] [2020-08-18 23:32:20,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,006 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-18 23:32:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,026 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-18 23:32:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,029 INFO L225 Difference]: With dead ends: 228 [2020-08-18 23:32:20,029 INFO L226 Difference]: Without dead ends: 226 [2020-08-18 23:32:20,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-18 23:32:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-18 23:32:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 23:32:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-18 23:32:20,068 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-18 23:32:20,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,069 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-18 23:32:20,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-18 23:32:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:20,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,071 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] [2020-08-18 23:32:20,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:32:20,071 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-18 23:32:20,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212070182] [2020-08-18 23:32:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212070182] [2020-08-18 23:32:20,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233859830] [2020-08-18 23:32:20,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,149 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-18 23:32:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,187 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-18 23:32:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,190 INFO L225 Difference]: With dead ends: 392 [2020-08-18 23:32:20,190 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 23:32:20,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 23:32:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-18 23:32:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-18 23:32:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-18 23:32:20,212 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-18 23:32:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,213 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-18 23:32:20,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-18 23:32:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:20,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:20,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:32:20,216 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-18 23:32:20,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371249047] [2020-08-18 23:32:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371249047] [2020-08-18 23:32:20,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240812007] [2020-08-18 23:32:20,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,243 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-18 23:32:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,264 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-18 23:32:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,267 INFO L225 Difference]: With dead ends: 348 [2020-08-18 23:32:20,267 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 23:32:20,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 23:32:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-18 23:32:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-18 23:32:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-18 23:32:20,280 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-18 23:32:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,281 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-18 23:32:20,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-18 23:32:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:20,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:20,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:32:20,283 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,284 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-18 23:32:20,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599884826] [2020-08-18 23:32:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599884826] [2020-08-18 23:32:20,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560758899] [2020-08-18 23:32:20,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,317 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-18 23:32:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,336 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-18 23:32:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,340 INFO L225 Difference]: With dead ends: 428 [2020-08-18 23:32:20,340 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 23:32:20,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 23:32:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-18 23:32:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-18 23:32:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-18 23:32:20,354 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-18 23:32:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,355 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-18 23:32:20,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,355 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-18 23:32:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:20,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:20,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:32:20,357 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-18 23:32:20,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994374697] [2020-08-18 23:32:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994374697] [2020-08-18 23:32:20,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883838107] [2020-08-18 23:32:20,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,383 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-18 23:32:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,406 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-18 23:32:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,410 INFO L225 Difference]: With dead ends: 764 [2020-08-18 23:32:20,410 INFO L226 Difference]: Without dead ends: 450 [2020-08-18 23:32:20,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-18 23:32:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-18 23:32:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-18 23:32:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-18 23:32:20,429 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-18 23:32:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,429 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-18 23:32:20,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-18 23:32:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:20,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,431 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, 1] [2020-08-18 23:32:20,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:32:20,431 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-18 23:32:20,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128109673] [2020-08-18 23:32:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128109673] [2020-08-18 23:32:20,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063466048] [2020-08-18 23:32:20,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,460 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-18 23:32:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,480 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-18 23:32:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,484 INFO L225 Difference]: With dead ends: 672 [2020-08-18 23:32:20,484 INFO L226 Difference]: Without dead ends: 458 [2020-08-18 23:32:20,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-18 23:32:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-18 23:32:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-18 23:32:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-18 23:32:20,501 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-18 23:32:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,501 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-18 23:32:20,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,501 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-18 23:32:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:20,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,503 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, 1] [2020-08-18 23:32:20,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:32:20,503 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-18 23:32:20,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424923475] [2020-08-18 23:32:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424923475] [2020-08-18 23:32:20,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306691461] [2020-08-18 23:32:20,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,536 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-18 23:32:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,563 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-18 23:32:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,568 INFO L225 Difference]: With dead ends: 812 [2020-08-18 23:32:20,568 INFO L226 Difference]: Without dead ends: 810 [2020-08-18 23:32:20,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-18 23:32:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-18 23:32:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-18 23:32:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-18 23:32:20,590 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-18 23:32:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,590 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-18 23:32:20,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-18 23:32:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:20,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,592 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, 1] [2020-08-18 23:32:20,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:32:20,593 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-18 23:32:20,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115151892] [2020-08-18 23:32:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115151892] [2020-08-18 23:32:20,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011695100] [2020-08-18 23:32:20,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,620 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-18 23:32:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,647 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-18 23:32:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,652 INFO L225 Difference]: With dead ends: 1500 [2020-08-18 23:32:20,652 INFO L226 Difference]: Without dead ends: 874 [2020-08-18 23:32:20,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-18 23:32:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-18 23:32:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-18 23:32:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-18 23:32:20,683 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-18 23:32:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,683 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-18 23:32:20,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-18 23:32:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:20,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,685 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, 1, 1] [2020-08-18 23:32:20,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:32:20,686 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,686 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-18 23:32:20,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460973352] [2020-08-18 23:32:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460973352] [2020-08-18 23:32:20,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889136485] [2020-08-18 23:32:20,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,713 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-18 23:32:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,742 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-18 23:32:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,748 INFO L225 Difference]: With dead ends: 1308 [2020-08-18 23:32:20,748 INFO L226 Difference]: Without dead ends: 890 [2020-08-18 23:32:20,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-18 23:32:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-18 23:32:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-18 23:32:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-18 23:32:20,781 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-18 23:32:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,782 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-18 23:32:20,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-18 23:32:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:20,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,784 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, 1, 1] [2020-08-18 23:32:20,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:32:20,785 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,785 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-18 23:32:20,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012224553] [2020-08-18 23:32:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012224553] [2020-08-18 23:32:20,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471394714] [2020-08-18 23:32:20,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,815 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-18 23:32:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,853 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-18 23:32:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,861 INFO L225 Difference]: With dead ends: 1548 [2020-08-18 23:32:20,861 INFO L226 Difference]: Without dead ends: 1546 [2020-08-18 23:32:20,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-18 23:32:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-18 23:32:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-18 23:32:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-18 23:32:20,899 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-18 23:32:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,900 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-18 23:32:20,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-18 23:32:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:20,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,903 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, 1, 1] [2020-08-18 23:32:20,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 23:32:20,903 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-18 23:32:20,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987535798] [2020-08-18 23:32:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987535798] [2020-08-18 23:32:20,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146111126] [2020-08-18 23:32:20,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,925 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-18 23:32:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,976 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-18 23:32:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,984 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 23:32:20,985 INFO L226 Difference]: Without dead ends: 1706 [2020-08-18 23:32:20,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-18 23:32:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-18 23:32:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-18 23:32:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-18 23:32:21,040 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-18 23:32:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:21,040 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-18 23:32:21,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-18 23:32:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:21,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:21,043 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, 1, 1, 1] [2020-08-18 23:32:21,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 23:32:21,044 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-18 23:32:21,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:21,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841484376] [2020-08-18 23:32:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:21,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841484376] [2020-08-18 23:32:21,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:21,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:21,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764069190] [2020-08-18 23:32:21,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:21,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:21,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,073 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-18 23:32:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:21,124 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-18 23:32:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:21,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:21,136 INFO L225 Difference]: With dead ends: 2556 [2020-08-18 23:32:21,136 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 23:32:21,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 23:32:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-18 23:32:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-18 23:32:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-18 23:32:21,210 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-18 23:32:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:21,210 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-18 23:32:21,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-18 23:32:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:21,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:21,213 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, 1, 1, 1] [2020-08-18 23:32:21,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 23:32:21,214 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-18 23:32:21,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:21,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679740896] [2020-08-18 23:32:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:21,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679740896] [2020-08-18 23:32:21,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:21,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:21,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326695122] [2020-08-18 23:32:21,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:21,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:21,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:21,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,240 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-18 23:32:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:21,313 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-18 23:32:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:21,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:21,330 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 23:32:21,331 INFO L226 Difference]: Without dead ends: 2954 [2020-08-18 23:32:21,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-18 23:32:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-18 23:32:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-18 23:32:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-18 23:32:21,421 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-18 23:32:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:21,421 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-18 23:32:21,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-18 23:32:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:21,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:21,426 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, 1, 1, 1] [2020-08-18 23:32:21,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 23:32:21,427 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:21,427 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-18 23:32:21,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:21,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616525702] [2020-08-18 23:32:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:21,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616525702] [2020-08-18 23:32:21,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:21,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:21,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562696758] [2020-08-18 23:32:21,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:21,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:21,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:21,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,484 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-18 23:32:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:21,553 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-18 23:32:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:21,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:21,567 INFO L225 Difference]: With dead ends: 5836 [2020-08-18 23:32:21,567 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 23:32:21,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 23:32:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-18 23:32:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-18 23:32:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-18 23:32:21,671 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-18 23:32:21,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:21,671 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-18 23:32:21,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-18 23:32:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:21,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:21,676 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, 1, 1, 1, 1] [2020-08-18 23:32:21,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 23:32:21,677 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-18 23:32:21,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:21,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306953770] [2020-08-18 23:32:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:21,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306953770] [2020-08-18 23:32:21,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:21,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:21,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185193311] [2020-08-18 23:32:21,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:21,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:21,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:21,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,698 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-18 23:32:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:21,756 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-18 23:32:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:21,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:21,772 INFO L225 Difference]: With dead ends: 5004 [2020-08-18 23:32:21,772 INFO L226 Difference]: Without dead ends: 3402 [2020-08-18 23:32:21,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-18 23:32:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-18 23:32:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-18 23:32:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-18 23:32:21,880 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-18 23:32:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:21,880 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-18 23:32:21,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-18 23:32:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:21,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:21,885 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, 1, 1, 1, 1] [2020-08-18 23:32:21,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 23:32:21,885 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-18 23:32:21,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:21,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989918020] [2020-08-18 23:32:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:21,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989918020] [2020-08-18 23:32:21,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:21,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:21,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25123619] [2020-08-18 23:32:21,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:21,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,907 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-18 23:32:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:22,036 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-18 23:32:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:22,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:22,064 INFO L225 Difference]: With dead ends: 9804 [2020-08-18 23:32:22,064 INFO L226 Difference]: Without dead ends: 6538 [2020-08-18 23:32:22,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-18 23:32:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-18 23:32:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 23:32:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-18 23:32:22,255 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-18 23:32:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:22,255 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-18 23:32:22,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-18 23:32:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:22,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:22,266 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, 1, 1, 1, 1] [2020-08-18 23:32:22,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 23:32:22,267 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-18 23:32:22,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:22,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983452215] [2020-08-18 23:32:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:22,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:22,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983452215] [2020-08-18 23:32:22,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:22,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:22,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236194792] [2020-08-18 23:32:22,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:22,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:22,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:22,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:22,290 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-18 23:32:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:22,437 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-18 23:32:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:22,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:22,459 INFO L225 Difference]: With dead ends: 7052 [2020-08-18 23:32:22,459 INFO L226 Difference]: Without dead ends: 7050 [2020-08-18 23:32:22,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-18 23:32:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-18 23:32:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 23:32:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-18 23:32:22,711 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-18 23:32:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:22,711 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-18 23:32:22,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-18 23:32:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:32:22,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:22,720 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, 1, 1, 1, 1, 1] [2020-08-18 23:32:22,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 23:32:22,721 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-18 23:32:22,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:22,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039200654] [2020-08-18 23:32:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:22,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:22,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039200654] [2020-08-18 23:32:22,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:22,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:22,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904491031] [2020-08-18 23:32:22,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:22,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:22,748 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-18 23:32:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:22,904 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-18 23:32:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:22,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 23:32:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:22,926 INFO L225 Difference]: With dead ends: 10634 [2020-08-18 23:32:22,926 INFO L226 Difference]: Without dead ends: 10632 [2020-08-18 23:32:22,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-18 23:32:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-18 23:32:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-18 23:32:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-18 23:32:23,147 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-18 23:32:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:23,147 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-18 23:32:23,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-18 23:32:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:32:23,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:23,164 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, 1, 1, 1, 1, 1] [2020-08-18 23:32:23,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 23:32:23,164 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:23,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-18 23:32:23,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:23,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109948386] [2020-08-18 23:32:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:23,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:23,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109948386] [2020-08-18 23:32:23,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:23,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:23,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900570700] [2020-08-18 23:32:23,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:23,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:23,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:23,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:23,189 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-18 23:32:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:23,431 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-18 23:32:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:23,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 23:32:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:23,432 INFO L225 Difference]: With dead ends: 22664 [2020-08-18 23:32:23,432 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 23:32:23,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 23:32:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 23:32:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 23:32:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 23:32:23,466 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-18 23:32:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:23,466 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 23:32:23,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 23:32:23,466 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 23:32:23,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 23:32:23,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 23:32:23,494 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 23:32:23,495 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:32:23,495 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:32:23,495 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 23:32:23,495 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 23:32:23,495 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 23:32:23,495 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,495 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-18 23:32:23,495 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,495 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-18 23:32:23,496 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,496 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-18 23:32:23,496 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,496 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-18 23:32:23,496 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,497 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,497 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-18 23:32:23,497 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-18 23:32:23,497 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-18 23:32:23,497 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,497 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 23:32:23,498 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,498 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-18 23:32:23,498 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-18 23:32:23,498 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-18 23:32:23,498 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-18 23:32:23,498 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,498 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,498 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,499 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-18 23:32:23,499 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,499 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,499 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-18 23:32:23,499 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-18 23:32:23,499 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-18 23:32:23,499 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,499 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,499 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-18 23:32:23,500 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-18 23:32:23,500 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,500 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 23:32:23,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:32:23 BoogieIcfgContainer [2020-08-18 23:32:23,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:32:23,522 INFO L168 Benchmark]: Toolchain (without parser) took 5553.52 ms. Allocated memory was 138.4 MB in the beginning and 369.6 MB in the end (delta: 231.2 MB). Free memory was 102.0 MB in the beginning and 219.6 MB in the end (delta: -117.6 MB). Peak memory consumption was 113.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:23,523 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 23:32:23,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.48 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 89.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:23,524 INFO L168 Benchmark]: Boogie Preprocessor took 109.18 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 89.9 MB in the beginning and 178.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:23,527 INFO L168 Benchmark]: RCFGBuilder took 454.82 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 159.5 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:23,533 INFO L168 Benchmark]: TraceAbstraction took 4599.81 ms. Allocated memory was 200.3 MB in the beginning and 369.6 MB in the end (delta: 169.3 MB). Free memory was 158.8 MB in the beginning and 219.6 MB in the end (delta: -60.8 MB). Peak memory consumption was 108.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:23,535 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 384.48 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 89.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.18 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 89.9 MB in the beginning and 178.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 454.82 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 159.5 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4599.81 ms. Allocated memory was 200.3 MB in the beginning and 369.6 MB in the end (delta: 169.3 MB). Free memory was 158.8 MB in the beginning and 219.6 MB in the end (delta: -60.8 MB). Peak memory consumption was 108.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...