/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=SMALLESTAMONGWIDE --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 [2020-08-19 04:23:39,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:23:39,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:23:39,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:23:39,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:23:39,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:23:39,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:23:39,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:23:39,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:23:39,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:23:39,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:23:39,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:23:39,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:23:39,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:23:39,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:23:39,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:23:39,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:23:39,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:23:39,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:23:39,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:23:39,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:23:39,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:23:39,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:23:39,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:23:39,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:23:39,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:23:39,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:23:39,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:23:39,802 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 [2020-08-19 04:23:39,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:23:39,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:23:39,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:23:39,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:23:39,840 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:23:39,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:23:39,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:23:39,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:23:39,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:23:39,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:23:39,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:23:39,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:23:39,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:23:39,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:23:39,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:23:39,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:23:39,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:23:39,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:23:39,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:23:39,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:23:39,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:23:39,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:23:39,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:23:39,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:23:39,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:23:39,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:23:39,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:23:39,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:23:39,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:23:39,847 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=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:23:40,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:23:40,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:23:40,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:23:40,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:23:40,218 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:23:40,218 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-19 04:23:40,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4306f71b4/0d3b90201b55456e93498f5402c1c665/FLAG352a01486 [2020-08-19 04:23:40,756 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:23:40,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-19 04:23:40,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4306f71b4/0d3b90201b55456e93498f5402c1c665/FLAG352a01486 [2020-08-19 04:23:41,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4306f71b4/0d3b90201b55456e93498f5402c1c665 [2020-08-19 04:23:41,120 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:23:41,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:23:41,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:23:41,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:23:41,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:23:41,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67fc17d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41, skipping insertion in model container [2020-08-19 04:23:41,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:23:41,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:23:41,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:23:41,456 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:23:41,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:23:41,511 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:23:41,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41 WrapperNode [2020-08-19 04:23:41,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:23:41,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:23:41,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:23:41,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:23:41,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (1/1) ... [2020-08-19 04:23:41,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:23:41,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:23:41,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:23:41,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:23:41,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (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 [2020-08-19 04:23:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:23:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:23:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:23:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:23:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:23:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:23:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:23:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:23:42,008 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:23:42,009 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 04:23:42,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:23:42 BoogieIcfgContainer [2020-08-19 04:23:42,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:23:42,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:23:42,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:23:42,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:23:42,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:23:41" (1/3) ... [2020-08-19 04:23:42,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e533fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:23:42, skipping insertion in model container [2020-08-19 04:23:42,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:41" (2/3) ... [2020-08-19 04:23:42,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e533fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:23:42, skipping insertion in model container [2020-08-19 04:23:42,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:23:42" (3/3) ... [2020-08-19 04:23:42,025 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-19 04:23:42,043 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:23:42,051 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:23:42,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:23:42,112 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:23:42,112 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:23:42,112 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:23:42,112 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:23:42,113 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:23:42,113 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:23:42,113 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:23:42,114 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:23:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-19 04:23:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:23:42,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,146 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-19 04:23:42,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052224374] [2020-08-19 04:23:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052224374] [2020-08-19 04:23:42,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507581543] [2020-08-19 04:23:42,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,427 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-19 04:23:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,505 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-19 04:23:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 04:23:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,519 INFO L225 Difference]: With dead ends: 81 [2020-08-19 04:23:42,519 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 04:23:42,523 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 [2020-08-19 04:23:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 04:23:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-19 04:23:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 04:23:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-19 04:23:42,566 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-19 04:23:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,566 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-19 04:23:42,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,567 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-19 04:23:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:23:42,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:23:42,569 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-19 04:23:42,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130961274] [2020-08-19 04:23:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130961274] [2020-08-19 04:23:42,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582023558] [2020-08-19 04:23:42,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,635 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-19 04:23:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,662 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-19 04:23:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 04:23:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,664 INFO L225 Difference]: With dead ends: 107 [2020-08-19 04:23:42,665 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 04:23:42,666 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 [2020-08-19 04:23:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 04:23:42,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-19 04:23:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 04:23:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-19 04:23:42,677 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-19 04:23:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,677 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-19 04:23:42,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-19 04:23:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:42,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,679 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] [2020-08-19 04:23:42,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:23:42,680 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,680 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-19 04:23:42,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171160457] [2020-08-19 04:23:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171160457] [2020-08-19 04:23:42,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199353521] [2020-08-19 04:23:42,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,754 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-19 04:23:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,790 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-19 04:23:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,796 INFO L225 Difference]: With dead ends: 99 [2020-08-19 04:23:42,796 INFO L226 Difference]: Without dead ends: 69 [2020-08-19 04:23:42,797 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 [2020-08-19 04:23:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-19 04:23:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-19 04:23:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 04:23:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-19 04:23:42,811 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-19 04:23:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,811 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-19 04:23:42,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-19 04:23:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:42,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,813 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] [2020-08-19 04:23:42,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:23:42,814 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,815 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-19 04:23:42,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546144611] [2020-08-19 04:23:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546144611] [2020-08-19 04:23:42,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814845137] [2020-08-19 04:23:42,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,870 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-19 04:23:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,894 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-19 04:23:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,897 INFO L225 Difference]: With dead ends: 124 [2020-08-19 04:23:42,897 INFO L226 Difference]: Without dead ends: 122 [2020-08-19 04:23:42,898 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 [2020-08-19 04:23:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-19 04:23:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-19 04:23:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 04:23:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-19 04:23:42,911 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-19 04:23:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,911 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-19 04:23:42,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-19 04:23:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:42,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,913 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] [2020-08-19 04:23:42,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:23:42,913 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,914 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-19 04:23:42,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647647286] [2020-08-19 04:23:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647647286] [2020-08-19 04:23:42,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868054841] [2020-08-19 04:23:42,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,971 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-19 04:23:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,004 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-19 04:23:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,007 INFO L225 Difference]: With dead ends: 204 [2020-08-19 04:23:43,007 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 04:23:43,009 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 [2020-08-19 04:23:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 04:23:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-19 04:23:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-19 04:23:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-19 04:23:43,025 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-19 04:23:43,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,025 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-19 04:23:43,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-19 04:23:43,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:43,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,027 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] [2020-08-19 04:23:43,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:23:43,028 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-19 04:23:43,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080531607] [2020-08-19 04:23:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080531607] [2020-08-19 04:23:43,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589489106] [2020-08-19 04:23:43,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,066 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-19 04:23:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,104 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-19 04:23:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,107 INFO L225 Difference]: With dead ends: 183 [2020-08-19 04:23:43,107 INFO L226 Difference]: Without dead ends: 126 [2020-08-19 04:23:43,108 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 [2020-08-19 04:23:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-19 04:23:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-19 04:23:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-19 04:23:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-19 04:23:43,126 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-19 04:23:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,128 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-19 04:23:43,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-19 04:23:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:43,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,130 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] [2020-08-19 04:23:43,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:23:43,131 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-19 04:23:43,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696375620] [2020-08-19 04:23:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696375620] [2020-08-19 04:23:43,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185413589] [2020-08-19 04:23:43,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,216 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-19 04:23:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,243 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-19 04:23:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,246 INFO L225 Difference]: With dead ends: 228 [2020-08-19 04:23:43,246 INFO L226 Difference]: Without dead ends: 226 [2020-08-19 04:23:43,247 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 [2020-08-19 04:23:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-19 04:23:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-19 04:23:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 04:23:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-19 04:23:43,260 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-19 04:23:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,261 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-19 04:23:43,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-19 04:23:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:43,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,263 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] [2020-08-19 04:23:43,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:23:43,263 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-19 04:23:43,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778855055] [2020-08-19 04:23:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778855055] [2020-08-19 04:23:43,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651722403] [2020-08-19 04:23:43,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,297 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-19 04:23:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,321 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-19 04:23:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,324 INFO L225 Difference]: With dead ends: 392 [2020-08-19 04:23:43,324 INFO L226 Difference]: Without dead ends: 234 [2020-08-19 04:23:43,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-19 04:23:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-19 04:23:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-19 04:23:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-19 04:23:43,339 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-19 04:23:43,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,340 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-19 04:23:43,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,340 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-19 04:23:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:23:43,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,342 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] [2020-08-19 04:23:43,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:23:43,342 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-19 04:23:43,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418617871] [2020-08-19 04:23:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418617871] [2020-08-19 04:23:43,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017156479] [2020-08-19 04:23:43,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,373 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-19 04:23:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,393 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-19 04:23:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 04:23:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,395 INFO L225 Difference]: With dead ends: 348 [2020-08-19 04:23:43,396 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 04:23:43,397 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 [2020-08-19 04:23:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 04:23:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-19 04:23:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-19 04:23:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-19 04:23:43,409 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-19 04:23:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,409 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-19 04:23:43,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-19 04:23:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:23:43,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,411 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] [2020-08-19 04:23:43,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:23:43,412 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,412 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-19 04:23:43,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561111144] [2020-08-19 04:23:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561111144] [2020-08-19 04:23:43,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054126660] [2020-08-19 04:23:43,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,450 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-19 04:23:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,495 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-19 04:23:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 04:23:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,498 INFO L225 Difference]: With dead ends: 428 [2020-08-19 04:23:43,498 INFO L226 Difference]: Without dead ends: 426 [2020-08-19 04:23:43,499 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 [2020-08-19 04:23:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-19 04:23:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-19 04:23:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-19 04:23:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-19 04:23:43,513 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-19 04:23:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,513 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-19 04:23:43,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-19 04:23:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:23:43,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,515 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] [2020-08-19 04:23:43,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:23:43,516 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-19 04:23:43,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470224548] [2020-08-19 04:23:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470224548] [2020-08-19 04:23:43,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258663756] [2020-08-19 04:23:43,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,540 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-19 04:23:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,564 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-19 04:23:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 04:23:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,567 INFO L225 Difference]: With dead ends: 764 [2020-08-19 04:23:43,567 INFO L226 Difference]: Without dead ends: 450 [2020-08-19 04:23:43,569 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 [2020-08-19 04:23:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-19 04:23:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-19 04:23:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-19 04:23:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-19 04:23:43,587 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-19 04:23:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,587 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-19 04:23:43,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-19 04:23:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 04:23:43,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,589 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] [2020-08-19 04:23:43,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:23:43,589 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-19 04:23:43,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939793396] [2020-08-19 04:23:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939793396] [2020-08-19 04:23:43,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756448611] [2020-08-19 04:23:43,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,633 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-19 04:23:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,658 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-19 04:23:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 04:23:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,662 INFO L225 Difference]: With dead ends: 672 [2020-08-19 04:23:43,662 INFO L226 Difference]: Without dead ends: 458 [2020-08-19 04:23:43,663 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 [2020-08-19 04:23:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-19 04:23:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-19 04:23:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-19 04:23:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-19 04:23:43,682 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-19 04:23:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,682 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-19 04:23:43,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-19 04:23:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 04:23:43,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,686 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] [2020-08-19 04:23:43,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:23:43,687 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-19 04:23:43,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330287982] [2020-08-19 04:23:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330287982] [2020-08-19 04:23:43,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964317610] [2020-08-19 04:23:43,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,729 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-19 04:23:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,757 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-19 04:23:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 04:23:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,763 INFO L225 Difference]: With dead ends: 812 [2020-08-19 04:23:43,763 INFO L226 Difference]: Without dead ends: 810 [2020-08-19 04:23:43,764 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 [2020-08-19 04:23:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-19 04:23:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-19 04:23:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-19 04:23:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-19 04:23:43,785 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-19 04:23:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,786 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-19 04:23:43,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-19 04:23:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 04:23:43,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,787 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] [2020-08-19 04:23:43,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:23:43,788 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-19 04:23:43,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273220795] [2020-08-19 04:23:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273220795] [2020-08-19 04:23:43,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356360479] [2020-08-19 04:23:43,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,859 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-19 04:23:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,895 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-19 04:23:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 04:23:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,902 INFO L225 Difference]: With dead ends: 1500 [2020-08-19 04:23:43,902 INFO L226 Difference]: Without dead ends: 874 [2020-08-19 04:23:43,905 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 [2020-08-19 04:23:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-19 04:23:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-19 04:23:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-19 04:23:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-19 04:23:43,939 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-19 04:23:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,941 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-19 04:23:43,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-19 04:23:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 04:23:43,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,943 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] [2020-08-19 04:23:43,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:23:43,944 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,944 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-19 04:23:43,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775716169] [2020-08-19 04:23:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775716169] [2020-08-19 04:23:43,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647394694] [2020-08-19 04:23:43,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,987 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-19 04:23:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,031 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-19 04:23:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 04:23:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,035 INFO L225 Difference]: With dead ends: 1308 [2020-08-19 04:23:44,035 INFO L226 Difference]: Without dead ends: 890 [2020-08-19 04:23:44,036 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 [2020-08-19 04:23:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-19 04:23:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-19 04:23:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-19 04:23:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-19 04:23:44,063 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-19 04:23:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:44,064 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-19 04:23:44,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-19 04:23:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 04:23:44,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:44,066 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] [2020-08-19 04:23:44,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:23:44,066 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-19 04:23:44,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:44,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549694981] [2020-08-19 04:23:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:44,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549694981] [2020-08-19 04:23:44,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:44,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:44,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507881628] [2020-08-19 04:23:44,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:44,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:44,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:44,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,090 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-19 04:23:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,122 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-19 04:23:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 04:23:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,131 INFO L225 Difference]: With dead ends: 1548 [2020-08-19 04:23:44,131 INFO L226 Difference]: Without dead ends: 1546 [2020-08-19 04:23:44,132 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 [2020-08-19 04:23:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-19 04:23:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-19 04:23:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-19 04:23:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-19 04:23:44,173 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-19 04:23:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:44,174 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-19 04:23:44,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-19 04:23:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 04:23:44,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:44,177 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] [2020-08-19 04:23:44,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:23:44,177 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-19 04:23:44,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:44,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084699905] [2020-08-19 04:23:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:44,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084699905] [2020-08-19 04:23:44,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:44,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:44,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111868559] [2020-08-19 04:23:44,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:44,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:44,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:44,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,202 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-19 04:23:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,246 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-19 04:23:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 04:23:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,255 INFO L225 Difference]: With dead ends: 2956 [2020-08-19 04:23:44,256 INFO L226 Difference]: Without dead ends: 1706 [2020-08-19 04:23:44,259 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 [2020-08-19 04:23:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-19 04:23:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-19 04:23:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-19 04:23:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-19 04:23:44,336 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-19 04:23:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:44,337 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-19 04:23:44,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-19 04:23:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:23:44,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:44,342 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] [2020-08-19 04:23:44,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 04:23:44,342 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:44,343 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-19 04:23:44,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:44,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442469502] [2020-08-19 04:23:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:44,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442469502] [2020-08-19 04:23:44,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:44,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:44,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824741847] [2020-08-19 04:23:44,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:44,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:44,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:44,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,381 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-19 04:23:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,445 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-19 04:23:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 04:23:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,455 INFO L225 Difference]: With dead ends: 2556 [2020-08-19 04:23:44,456 INFO L226 Difference]: Without dead ends: 1738 [2020-08-19 04:23:44,462 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 [2020-08-19 04:23:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-19 04:23:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-19 04:23:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-19 04:23:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-19 04:23:44,544 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-19 04:23:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:44,545 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-19 04:23:44,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-19 04:23:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:23:44,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:44,549 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] [2020-08-19 04:23:44,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 04:23:44,550 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-19 04:23:44,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:44,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840746554] [2020-08-19 04:23:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:44,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840746554] [2020-08-19 04:23:44,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:44,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:44,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129697953] [2020-08-19 04:23:44,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:44,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:44,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,592 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-19 04:23:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,678 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-19 04:23:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 04:23:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,694 INFO L225 Difference]: With dead ends: 2956 [2020-08-19 04:23:44,695 INFO L226 Difference]: Without dead ends: 2954 [2020-08-19 04:23:44,696 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 [2020-08-19 04:23:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-19 04:23:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-19 04:23:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-19 04:23:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-19 04:23:44,777 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-19 04:23:44,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:44,777 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-19 04:23:44,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-19 04:23:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:23:44,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:44,785 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] [2020-08-19 04:23:44,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 04:23:44,785 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-19 04:23:44,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:44,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716152719] [2020-08-19 04:23:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:44,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716152719] [2020-08-19 04:23:44,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:44,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:44,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670884395] [2020-08-19 04:23:44,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:44,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,812 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-19 04:23:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,890 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-19 04:23:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 04:23:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,906 INFO L225 Difference]: With dead ends: 5836 [2020-08-19 04:23:44,906 INFO L226 Difference]: Without dead ends: 3338 [2020-08-19 04:23:44,911 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 [2020-08-19 04:23:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-19 04:23:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-19 04:23:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-19 04:23:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-19 04:23:45,024 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-19 04:23:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:45,024 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-19 04:23:45,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-19 04:23:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 04:23:45,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:45,029 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] [2020-08-19 04:23:45,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 04:23:45,032 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-19 04:23:45,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:45,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588500042] [2020-08-19 04:23:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:45,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:45,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588500042] [2020-08-19 04:23:45,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:45,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:45,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014268866] [2020-08-19 04:23:45,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:45,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:45,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:45,053 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-19 04:23:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:45,136 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-19 04:23:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:45,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 04:23:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:45,150 INFO L225 Difference]: With dead ends: 5004 [2020-08-19 04:23:45,151 INFO L226 Difference]: Without dead ends: 3402 [2020-08-19 04:23:45,154 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 [2020-08-19 04:23:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-19 04:23:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-19 04:23:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-19 04:23:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-19 04:23:45,250 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-19 04:23:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:45,250 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-19 04:23:45,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-19 04:23:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 04:23:45,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:45,255 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] [2020-08-19 04:23:45,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 04:23:45,255 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-19 04:23:45,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:45,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725166129] [2020-08-19 04:23:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:45,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:45,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725166129] [2020-08-19 04:23:45,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:45,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:45,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221345559] [2020-08-19 04:23:45,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:45,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:45,281 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-19 04:23:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:45,385 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-19 04:23:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:45,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 04:23:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:45,415 INFO L225 Difference]: With dead ends: 9804 [2020-08-19 04:23:45,416 INFO L226 Difference]: Without dead ends: 6538 [2020-08-19 04:23:45,424 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 [2020-08-19 04:23:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-19 04:23:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-19 04:23:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-19 04:23:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-19 04:23:45,683 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-19 04:23:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:45,683 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-19 04:23:45,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-19 04:23:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 04:23:45,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:45,692 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] [2020-08-19 04:23:45,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 04:23:45,692 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:45,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-19 04:23:45,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:45,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915538366] [2020-08-19 04:23:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:45,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:45,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915538366] [2020-08-19 04:23:45,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:45,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:45,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826038895] [2020-08-19 04:23:45,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:45,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:45,729 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-19 04:23:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:45,856 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-19 04:23:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:45,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 04:23:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:45,889 INFO L225 Difference]: With dead ends: 7052 [2020-08-19 04:23:45,889 INFO L226 Difference]: Without dead ends: 7050 [2020-08-19 04:23:45,892 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 [2020-08-19 04:23:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-19 04:23:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-19 04:23:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-19 04:23:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-19 04:23:46,074 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-19 04:23:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:46,074 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-19 04:23:46,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:46,075 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-19 04:23:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 04:23:46,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:46,084 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] [2020-08-19 04:23:46,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 04:23:46,084 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-19 04:23:46,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:46,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577287778] [2020-08-19 04:23:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:46,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:46,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577287778] [2020-08-19 04:23:46,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:46,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:46,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126080172] [2020-08-19 04:23:46,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:46,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:46,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:46,108 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-19 04:23:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:46,308 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-19 04:23:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:46,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 04:23:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:46,329 INFO L225 Difference]: With dead ends: 10634 [2020-08-19 04:23:46,329 INFO L226 Difference]: Without dead ends: 10632 [2020-08-19 04:23:46,332 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 [2020-08-19 04:23:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-19 04:23:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-19 04:23:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-19 04:23:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-19 04:23:46,533 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-19 04:23:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:46,534 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-19 04:23:46,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-19 04:23:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 04:23:46,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:46,549 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] [2020-08-19 04:23:46,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 04:23:46,550 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:46,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-19 04:23:46,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:46,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344745691] [2020-08-19 04:23:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:46,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:46,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344745691] [2020-08-19 04:23:46,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:46,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:46,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197698900] [2020-08-19 04:23:46,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:46,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:46,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:46,576 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-19 04:23:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:46,864 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-19 04:23:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:46,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 04:23:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:46,865 INFO L225 Difference]: With dead ends: 22664 [2020-08-19 04:23:46,865 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:23:46,900 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 [2020-08-19 04:23:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:23:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:23:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:23:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:23:46,901 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-19 04:23:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:46,901 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:23:46,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:23:46,901 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:23:46,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 04:23:46,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 04:23:46,926 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 04:23:46,926 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:23:46,926 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:23:46,926 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 04:23:46,927 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 04:23:46,927 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 04:23:46,927 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,927 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-19 04:23:46,927 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,927 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-19 04:23:46,927 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,927 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-19 04:23:46,927 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,928 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-19 04:23:46,928 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,928 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,928 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-19 04:23:46,928 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-19 04:23:46,928 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-19 04:23:46,928 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,928 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-19 04:23:46,928 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,929 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-19 04:23:46,929 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-19 04:23:46,929 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-19 04:23:46,929 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-19 04:23:46,929 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,929 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,929 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,930 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-19 04:23:46,930 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,930 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,930 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-19 04:23:46,930 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-19 04:23:46,930 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-19 04:23:46,930 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,930 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,930 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-19 04:23:46,931 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-19 04:23:46,931 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,931 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 04:23:46,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:23:46 BoogieIcfgContainer [2020-08-19 04:23:46,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:23:46,946 INFO L168 Benchmark]: Toolchain (without parser) took 5823.55 ms. Allocated memory was 142.1 MB in the beginning and 335.5 MB in the end (delta: 193.5 MB). Free memory was 106.0 MB in the beginning and 221.5 MB in the end (delta: -115.5 MB). Peak memory consumption was 78.0 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:46,946 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.7 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:23:46,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.07 ms. Allocated memory is still 142.1 MB. Free memory was 105.8 MB in the beginning and 95.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:46,947 INFO L168 Benchmark]: Boogie Preprocessor took 139.51 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 95.4 MB in the beginning and 182.6 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:46,948 INFO L168 Benchmark]: RCFGBuilder took 363.39 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 164.1 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:46,948 INFO L168 Benchmark]: TraceAbstraction took 4925.59 ms. Allocated memory was 204.5 MB in the beginning and 335.5 MB in the end (delta: 131.1 MB). Free memory was 163.4 MB in the beginning and 221.5 MB in the end (delta: -58.1 MB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:46,951 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.7 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 389.07 ms. Allocated memory is still 142.1 MB. Free memory was 105.8 MB in the beginning and 95.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.51 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 95.4 MB in the beginning and 182.6 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 363.39 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 164.1 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4925.59 ms. Allocated memory was 204.5 MB in the beginning and 335.5 MB in the end (delta: 131.1 MB). Free memory was 163.4 MB in the beginning and 221.5 MB in the end (delta: -58.1 MB). Peak memory consumption was 73.0 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: 4.7s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.9s, 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, 0.3s 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...