/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:31:59,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:31:59,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:32:00,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:32:00,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:32:00,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:32:00,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:32:00,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:32:00,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:32:00,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:32:00,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:32:00,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:32:00,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:32:00,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:32:00,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:32:00,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:32:00,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:32:00,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:32:00,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:32:00,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:32:00,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:32:00,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:32:00,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:32:00,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:32:00,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:32:00,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:32:00,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:32:00,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:32:00,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:32:00,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 01:32:00,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:32:00,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:32:00,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:32:00,068 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 [2020-08-22 01:32:00,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:32:00,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:32:00,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:32:00,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:32:00,117 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:32:00,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:32:00,117 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:32:00,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:32:00,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:32:00,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:32:00,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:32:00,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:32:00,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:32:00,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:32:00,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:32:00,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:32:00,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:32:00,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:32:00,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:32:00,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:32:00,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:32:00,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:32:00,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:32:00,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:32:00,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:32:00,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:32:00,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:32:00,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:32:00,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:32:00,123 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:32:00,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:32:00,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:32:00,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:32:00,472 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:32:00,472 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:32:00,473 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-22 01:32:00,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56dc6cdbb/0f89dc3a98f540e18719e14b679b2f3b/FLAGc01dfe9db [2020-08-22 01:32:00,941 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:32:00,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-22 01:32:00,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56dc6cdbb/0f89dc3a98f540e18719e14b679b2f3b/FLAGc01dfe9db [2020-08-22 01:32:01,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56dc6cdbb/0f89dc3a98f540e18719e14b679b2f3b [2020-08-22 01:32:01,322 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:32:01,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:32:01,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:32:01,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:32:01,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:32:01,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdd1826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01, skipping insertion in model container [2020-08-22 01:32:01,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:32:01,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:32:01,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:32:01,596 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:32:01,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:32:01,635 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:32:01,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01 WrapperNode [2020-08-22 01:32:01,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:32:01,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:32:01,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:32:01,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:32:01,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (1/1) ... [2020-08-22 01:32:01,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:32:01,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:32:01,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:32:01,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:32:01,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (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 [2020-08-22 01:32:01,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:32:01,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:32:01,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 01:32:01,818 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-22 01:32:01,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:32:01,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:32:01,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:32:01,819 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 01:32:01,819 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-08-22 01:32:01,820 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 01:32:01,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 01:32:01,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 01:32:01,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:32:01,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 01:32:01,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 01:32:01,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:32:01,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:32:01,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:32:02,074 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:32:02,075 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 01:32:02,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:02 BoogieIcfgContainer [2020-08-22 01:32:02,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:32:02,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:32:02,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:32:02,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:32:02,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:32:01" (1/3) ... [2020-08-22 01:32:02,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730dfae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:02, skipping insertion in model container [2020-08-22 01:32:02,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:01" (2/3) ... [2020-08-22 01:32:02,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730dfae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:02, skipping insertion in model container [2020-08-22 01:32:02,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:02" (3/3) ... [2020-08-22 01:32:02,103 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-08-22 01:32:02,134 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:32:02,146 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:32:02,171 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:32:02,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:32:02,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:32:02,198 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:32:02,198 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:32:02,199 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:32:02,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:32:02,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:32:02,199 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:32:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 01:32:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:32:02,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:02,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:02,222 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-08-22 01:32:02,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:02,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756343025] [2020-08-22 01:32:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:02,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756343025] [2020-08-22 01:32:02,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:02,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:32:02,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891019796] [2020-08-22 01:32:02,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:32:02,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:02,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:32:02,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:32:02,481 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-08-22 01:32:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:02,641 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-08-22 01:32:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:32:02,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-22 01:32:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:02,654 INFO L225 Difference]: With dead ends: 59 [2020-08-22 01:32:02,655 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 01:32:02,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 01:32:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-22 01:32:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 01:32:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 01:32:02,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-08-22 01:32:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:02,700 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 01:32:02,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:32:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 01:32:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:32:02,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:02,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:02,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:32:02,703 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:02,704 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-08-22 01:32:02,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:02,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758731097] [2020-08-22 01:32:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:02,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758731097] [2020-08-22 01:32:02,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:02,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:32:02,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516585340] [2020-08-22 01:32:02,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:32:02,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:02,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:32:02,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:02,954 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-22 01:32:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:03,184 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-22 01:32:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:32:03,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 01:32:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:03,186 INFO L225 Difference]: With dead ends: 48 [2020-08-22 01:32:03,186 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 01:32:03,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:32:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 01:32:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-22 01:32:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 01:32:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-22 01:32:03,196 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-22 01:32:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:03,197 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-22 01:32:03,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:32:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-22 01:32:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:32:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:03,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:03,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:32:03,199 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-08-22 01:32:03,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:03,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995713154] [2020-08-22 01:32:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:03,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995713154] [2020-08-22 01:32:03,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:03,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:32:03,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193034510] [2020-08-22 01:32:03,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:32:03,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:03,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:32:03,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:32:03,373 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-22 01:32:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:03,542 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-22 01:32:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:32:03,542 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 01:32:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:03,544 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:32:03,544 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 01:32:03,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:32:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 01:32:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-22 01:32:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 01:32:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 01:32:03,561 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 01:32:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:03,561 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 01:32:03,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:32:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 01:32:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:32:03,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:03,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:03,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:32:03,564 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2059999690, now seen corresponding path program 2 times [2020-08-22 01:32:03,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:03,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134444597] [2020-08-22 01:32:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:03,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134444597] [2020-08-22 01:32:03,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:03,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 01:32:03,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023718259] [2020-08-22 01:32:03,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:32:03,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:32:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:32:03,819 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-22 01:32:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:04,001 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-08-22 01:32:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:32:04,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-22 01:32:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:04,003 INFO L225 Difference]: With dead ends: 52 [2020-08-22 01:32:04,003 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 01:32:04,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:32:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 01:32:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 01:32:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 01:32:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 01:32:04,012 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-22 01:32:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:04,012 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 01:32:04,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:32:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 01:32:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 01:32:04,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:04,014 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:04,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:32:04,014 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1428164148, now seen corresponding path program 3 times [2020-08-22 01:32:04,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:04,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767729445] [2020-08-22 01:32:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:04,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767729445] [2020-08-22 01:32:04,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:04,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:32:04,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675271207] [2020-08-22 01:32:04,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:32:04,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:32:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:32:04,253 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-22 01:32:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:04,428 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-08-22 01:32:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:32:04,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 01:32:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:04,430 INFO L225 Difference]: With dead ends: 54 [2020-08-22 01:32:04,430 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 01:32:04,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:32:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 01:32:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-22 01:32:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 01:32:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 01:32:04,438 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-22 01:32:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:04,438 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 01:32:04,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:32:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 01:32:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:32:04,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:04,440 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:04,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:32:04,440 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:04,441 INFO L82 PathProgramCache]: Analyzing trace with hash 815845710, now seen corresponding path program 4 times [2020-08-22 01:32:04,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:04,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105993689] [2020-08-22 01:32:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:04,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105993689] [2020-08-22 01:32:04,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:04,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:32:04,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109598854] [2020-08-22 01:32:04,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:32:04,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:04,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:32:04,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:32:04,694 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-22 01:32:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:04,867 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-22 01:32:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:32:04,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 01:32:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:04,869 INFO L225 Difference]: With dead ends: 56 [2020-08-22 01:32:04,869 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 01:32:04,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:32:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 01:32:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 01:32:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 01:32:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-22 01:32:04,876 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-22 01:32:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:04,877 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-22 01:32:04,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:32:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-22 01:32:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:32:04,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:04,879 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:04,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:32:04,879 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1235736656, now seen corresponding path program 5 times [2020-08-22 01:32:04,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:04,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264797479] [2020-08-22 01:32:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:05,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264797479] [2020-08-22 01:32:05,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:05,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:32:05,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872603787] [2020-08-22 01:32:05,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:32:05,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:32:05,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:32:05,189 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-22 01:32:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:05,370 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-22 01:32:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:32:05,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-22 01:32:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:05,372 INFO L225 Difference]: With dead ends: 58 [2020-08-22 01:32:05,372 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 01:32:05,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:32:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 01:32:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-22 01:32:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 01:32:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-22 01:32:05,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-22 01:32:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:05,379 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-22 01:32:05,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:32:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-22 01:32:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 01:32:05,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:05,380 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:05,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:32:05,380 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1024009938, now seen corresponding path program 6 times [2020-08-22 01:32:05,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:05,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197681924] [2020-08-22 01:32:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:05,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197681924] [2020-08-22 01:32:05,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:05,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:32:05,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430188154] [2020-08-22 01:32:05,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:32:05,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:05,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:32:05,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:32:05,690 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-22 01:32:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:05,916 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-22 01:32:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:32:05,916 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-22 01:32:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:05,917 INFO L225 Difference]: With dead ends: 60 [2020-08-22 01:32:05,917 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 01:32:05,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:32:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 01:32:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 01:32:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 01:32:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-22 01:32:05,929 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-22 01:32:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:05,930 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-22 01:32:05,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:32:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-22 01:32:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 01:32:05,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:05,931 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:05,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:32:05,932 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:05,932 INFO L82 PathProgramCache]: Analyzing trace with hash -581903148, now seen corresponding path program 7 times [2020-08-22 01:32:05,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:05,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129511317] [2020-08-22 01:32:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:06,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129511317] [2020-08-22 01:32:06,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:06,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:32:06,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978528435] [2020-08-22 01:32:06,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:32:06,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:06,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:32:06,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:32:06,278 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-08-22 01:32:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:06,477 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 01:32:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:32:06,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-08-22 01:32:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:06,479 INFO L225 Difference]: With dead ends: 62 [2020-08-22 01:32:06,479 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 01:32:06,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:32:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 01:32:06,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-22 01:32:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 01:32:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-22 01:32:06,490 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-08-22 01:32:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:06,490 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-22 01:32:06,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:32:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-22 01:32:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 01:32:06,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:06,495 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:06,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:32:06,499 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:06,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1971119530, now seen corresponding path program 8 times [2020-08-22 01:32:06,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:06,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682673000] [2020-08-22 01:32:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:06,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:06,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:06,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682673000] [2020-08-22 01:32:06,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:06,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:32:06,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508952946] [2020-08-22 01:32:06,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:32:06,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:06,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:32:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:32:06,928 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-08-22 01:32:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:07,128 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-22 01:32:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:32:07,129 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-22 01:32:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:07,130 INFO L225 Difference]: With dead ends: 64 [2020-08-22 01:32:07,130 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:32:07,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:32:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:32:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-22 01:32:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:32:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-22 01:32:07,138 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-08-22 01:32:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:07,139 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-22 01:32:07,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:32:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-22 01:32:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 01:32:07,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:07,140 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:07,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:32:07,141 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1273233576, now seen corresponding path program 9 times [2020-08-22 01:32:07,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:07,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027594874] [2020-08-22 01:32:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 01:32:07,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027594874] [2020-08-22 01:32:07,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:07,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:32:07,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60147401] [2020-08-22 01:32:07,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:07,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:07,209 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-08-22 01:32:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:07,291 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-08-22 01:32:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:32:07,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-22 01:32:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:07,294 INFO L225 Difference]: With dead ends: 65 [2020-08-22 01:32:07,294 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 01:32:07,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 01:32:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-08-22 01:32:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 01:32:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-22 01:32:07,305 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-08-22 01:32:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:07,306 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-22 01:32:07,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-22 01:32:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 01:32:07,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:07,307 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:07,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:32:07,307 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:07,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1053921041, now seen corresponding path program 1 times [2020-08-22 01:32:07,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:07,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065810911] [2020-08-22 01:32:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 01:32:07,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065810911] [2020-08-22 01:32:07,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:07,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:32:07,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625634599] [2020-08-22 01:32:07,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:32:07,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:32:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:07,380 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-22 01:32:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:07,479 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-08-22 01:32:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:32:07,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-22 01:32:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:07,481 INFO L225 Difference]: With dead ends: 73 [2020-08-22 01:32:07,481 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 01:32:07,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:32:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 01:32:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-08-22 01:32:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 01:32:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-08-22 01:32:07,488 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 41 [2020-08-22 01:32:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:07,488 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-08-22 01:32:07,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:32:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-08-22 01:32:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 01:32:07,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:07,489 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:07,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:32:07,490 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:07,490 INFO L82 PathProgramCache]: Analyzing trace with hash -159448072, now seen corresponding path program 2 times [2020-08-22 01:32:07,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:07,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186161089] [2020-08-22 01:32:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-22 01:32:07,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186161089] [2020-08-22 01:32:07,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:07,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:32:07,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484983268] [2020-08-22 01:32:07,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:07,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:07,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:07,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:07,596 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-08-22 01:32:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:07,666 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-08-22 01:32:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:32:07,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-22 01:32:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:07,668 INFO L225 Difference]: With dead ends: 69 [2020-08-22 01:32:07,668 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:32:07,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:32:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-22 01:32:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 01:32:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-08-22 01:32:07,684 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-08-22 01:32:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:07,685 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-08-22 01:32:07,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-08-22 01:32:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 01:32:07,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:07,686 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:07,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:32:07,687 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:07,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1139281096, now seen corresponding path program 1 times [2020-08-22 01:32:07,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:07,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038897162] [2020-08-22 01:32:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:08,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038897162] [2020-08-22 01:32:08,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:08,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:32:08,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884520572] [2020-08-22 01:32:08,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:32:08,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:32:08,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:32:08,159 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2020-08-22 01:32:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:08,394 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-08-22 01:32:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:32:08,395 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-08-22 01:32:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:08,396 INFO L225 Difference]: With dead ends: 74 [2020-08-22 01:32:08,396 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 01:32:08,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:32:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 01:32:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-22 01:32:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 01:32:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-22 01:32:08,404 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-08-22 01:32:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:08,404 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-22 01:32:08,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:32:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-22 01:32:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 01:32:08,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:08,405 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:08,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:32:08,406 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash 763672122, now seen corresponding path program 2 times [2020-08-22 01:32:08,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:08,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601948635] [2020-08-22 01:32:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:08,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:08,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:08,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601948635] [2020-08-22 01:32:08,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:08,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:32:08,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762749428] [2020-08-22 01:32:08,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:32:08,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:08,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:32:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:32:08,911 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-08-22 01:32:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:09,140 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-08-22 01:32:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:32:09,140 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-22 01:32:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:09,141 INFO L225 Difference]: With dead ends: 76 [2020-08-22 01:32:09,141 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 01:32:09,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:32:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 01:32:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-22 01:32:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 01:32:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-08-22 01:32:09,147 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-08-22 01:32:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:09,148 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-08-22 01:32:09,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:32:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-08-22 01:32:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 01:32:09,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:09,149 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:09,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:32:09,149 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash -154353476, now seen corresponding path program 3 times [2020-08-22 01:32:09,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:09,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352470587] [2020-08-22 01:32:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:09,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:09,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:09,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352470587] [2020-08-22 01:32:09,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:09,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:32:09,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287577359] [2020-08-22 01:32:09,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:32:09,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:32:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:32:09,692 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-08-22 01:32:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:09,939 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-08-22 01:32:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:32:09,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-08-22 01:32:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:09,942 INFO L225 Difference]: With dead ends: 78 [2020-08-22 01:32:09,942 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 01:32:09,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:32:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 01:32:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-22 01:32:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 01:32:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-22 01:32:09,951 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-08-22 01:32:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:09,952 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-22 01:32:09,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:32:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-22 01:32:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 01:32:09,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:09,953 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:09,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:32:09,953 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:09,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:09,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1908657474, now seen corresponding path program 4 times [2020-08-22 01:32:09,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:09,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11296987] [2020-08-22 01:32:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:09,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:10,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:10,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11296987] [2020-08-22 01:32:10,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:10,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:32:10,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666352768] [2020-08-22 01:32:10,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:32:10,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:10,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:32:10,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:32:10,507 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-08-22 01:32:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:10,753 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-22 01:32:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:32:10,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-22 01:32:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:10,755 INFO L225 Difference]: With dead ends: 80 [2020-08-22 01:32:10,755 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 01:32:10,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:32:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 01:32:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-22 01:32:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 01:32:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-22 01:32:10,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-08-22 01:32:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:10,762 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-22 01:32:10,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:32:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-22 01:32:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 01:32:10,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:10,763 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:10,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:32:10,763 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 127347776, now seen corresponding path program 5 times [2020-08-22 01:32:10,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:10,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259529338] [2020-08-22 01:32:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:10,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:10,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:11,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259529338] [2020-08-22 01:32:11,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:11,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:32:11,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563010616] [2020-08-22 01:32:11,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:32:11,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:32:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:32:11,414 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 19 states. [2020-08-22 01:32:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:11,712 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-08-22 01:32:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:32:11,713 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-08-22 01:32:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:11,714 INFO L225 Difference]: With dead ends: 82 [2020-08-22 01:32:11,714 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 01:32:11,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:32:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 01:32:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-22 01:32:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 01:32:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-22 01:32:11,721 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-08-22 01:32:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:11,721 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-22 01:32:11,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:32:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-22 01:32:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 01:32:11,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:11,722 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:11,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:32:11,723 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1776693950, now seen corresponding path program 6 times [2020-08-22 01:32:11,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:11,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678793363] [2020-08-22 01:32:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:11,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:11,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:12,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678793363] [2020-08-22 01:32:12,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:12,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:32:12,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330798332] [2020-08-22 01:32:12,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:32:12,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:32:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:32:12,379 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-08-22 01:32:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:12,668 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-08-22 01:32:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:32:12,671 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-08-22 01:32:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:12,672 INFO L225 Difference]: With dead ends: 84 [2020-08-22 01:32:12,672 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 01:32:12,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:32:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 01:32:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-22 01:32:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 01:32:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-08-22 01:32:12,683 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-08-22 01:32:12,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:12,683 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-08-22 01:32:12,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:32:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-08-22 01:32:12,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 01:32:12,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:12,685 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:12,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:32:12,685 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1904724540, now seen corresponding path program 7 times [2020-08-22 01:32:12,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:12,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459359201] [2020-08-22 01:32:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:12,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:12,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:13,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459359201] [2020-08-22 01:32:13,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:13,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:32:13,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137591900] [2020-08-22 01:32:13,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:32:13,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:13,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:32:13,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:32:13,654 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 21 states. [2020-08-22 01:32:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:13,845 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-08-22 01:32:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:32:13,845 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-08-22 01:32:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:13,846 INFO L225 Difference]: With dead ends: 86 [2020-08-22 01:32:13,846 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 01:32:13,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:32:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 01:32:13,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-22 01:32:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 01:32:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-08-22 01:32:13,858 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-08-22 01:32:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:13,859 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-08-22 01:32:13,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:32:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-08-22 01:32:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:32:13,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:13,864 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:13,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:32:13,865 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash -388069946, now seen corresponding path program 8 times [2020-08-22 01:32:13,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:13,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993976911] [2020-08-22 01:32:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:13,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:13,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:14,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993976911] [2020-08-22 01:32:14,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:14,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:32:14,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726893459] [2020-08-22 01:32:14,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:32:14,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:14,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:32:14,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:32:14,636 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-08-22 01:32:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:14,959 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-08-22 01:32:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:32:14,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-22 01:32:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:14,961 INFO L225 Difference]: With dead ends: 88 [2020-08-22 01:32:14,961 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 01:32:14,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:32:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 01:32:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-22 01:32:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 01:32:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-08-22 01:32:14,967 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-08-22 01:32:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:14,967 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-08-22 01:32:14,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:32:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-08-22 01:32:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 01:32:14,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:14,968 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:14,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:32:14,969 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1123081544, now seen corresponding path program 9 times [2020-08-22 01:32:14,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:14,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694557267] [2020-08-22 01:32:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:15,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:15,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:15,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694557267] [2020-08-22 01:32:15,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:15,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:32:15,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298495934] [2020-08-22 01:32:15,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:32:15,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:32:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:32:15,790 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2020-08-22 01:32:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:16,135 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-08-22 01:32:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:32:16,137 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-08-22 01:32:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:16,138 INFO L225 Difference]: With dead ends: 90 [2020-08-22 01:32:16,138 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 01:32:16,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:32:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 01:32:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-22 01:32:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 01:32:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-08-22 01:32:16,143 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-08-22 01:32:16,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:16,143 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-08-22 01:32:16,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:32:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-08-22 01:32:16,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 01:32:16,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:16,144 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:16,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:32:16,145 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:16,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:16,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1640717386, now seen corresponding path program 10 times [2020-08-22 01:32:16,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:16,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808725954] [2020-08-22 01:32:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:16,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:17,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808725954] [2020-08-22 01:32:17,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:17,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:32:17,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568294762] [2020-08-22 01:32:17,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:32:17,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:32:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:32:17,067 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-08-22 01:32:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:17,350 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-08-22 01:32:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:32:17,350 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-08-22 01:32:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:17,352 INFO L225 Difference]: With dead ends: 92 [2020-08-22 01:32:17,352 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 01:32:17,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=436, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:32:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 01:32:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-22 01:32:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 01:32:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-08-22 01:32:17,357 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-08-22 01:32:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:17,358 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-08-22 01:32:17,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:32:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-08-22 01:32:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 01:32:17,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:17,359 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:17,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:32:17,359 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:17,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:17,359 INFO L82 PathProgramCache]: Analyzing trace with hash 872555212, now seen corresponding path program 11 times [2020-08-22 01:32:17,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:17,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688898602] [2020-08-22 01:32:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:17,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:17,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:18,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688898602] [2020-08-22 01:32:18,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:18,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:32:18,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242941390] [2020-08-22 01:32:18,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:32:18,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:32:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:32:18,321 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 25 states. [2020-08-22 01:32:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:18,650 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-08-22 01:32:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:32:18,650 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-08-22 01:32:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:18,651 INFO L225 Difference]: With dead ends: 94 [2020-08-22 01:32:18,651 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 01:32:18,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:32:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 01:32:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-22 01:32:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 01:32:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-08-22 01:32:18,657 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-08-22 01:32:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:18,658 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-08-22 01:32:18,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:32:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-08-22 01:32:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 01:32:18,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:18,659 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:18,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:32:18,659 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1403080910, now seen corresponding path program 12 times [2020-08-22 01:32:18,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:18,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013656975] [2020-08-22 01:32:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:18,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:18,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:19,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013656975] [2020-08-22 01:32:19,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:19,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:32:19,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018286615] [2020-08-22 01:32:19,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:32:19,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:19,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:32:19,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:32:19,668 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-08-22 01:32:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:20,024 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-08-22 01:32:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 01:32:20,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-08-22 01:32:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:20,026 INFO L225 Difference]: With dead ends: 96 [2020-08-22 01:32:20,026 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 01:32:20,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:32:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 01:32:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-22 01:32:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 01:32:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-08-22 01:32:20,033 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-08-22 01:32:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:20,034 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-08-22 01:32:20,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:32:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-08-22 01:32:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 01:32:20,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:20,036 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:20,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:32:20,036 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:20,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash 137168464, now seen corresponding path program 13 times [2020-08-22 01:32:20,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:20,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331525198] [2020-08-22 01:32:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:20,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:20,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:21,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331525198] [2020-08-22 01:32:21,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:21,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:32:21,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639425128] [2020-08-22 01:32:21,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:32:21,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:21,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:32:21,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:32:21,338 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 27 states. [2020-08-22 01:32:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:21,568 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-08-22 01:32:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:32:21,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-08-22 01:32:21,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:21,569 INFO L225 Difference]: With dead ends: 98 [2020-08-22 01:32:21,569 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 01:32:21,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:32:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 01:32:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 01:32:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 01:32:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-08-22 01:32:21,574 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-08-22 01:32:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:21,575 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-08-22 01:32:21,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:32:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-08-22 01:32:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 01:32:21,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:21,576 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:21,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:32:21,576 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -928947374, now seen corresponding path program 14 times [2020-08-22 01:32:21,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:21,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698241844] [2020-08-22 01:32:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:21,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:21,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:22,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698241844] [2020-08-22 01:32:22,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:22,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 01:32:22,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359183605] [2020-08-22 01:32:22,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 01:32:22,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 01:32:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:32:22,803 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-08-22 01:32:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:23,133 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-08-22 01:32:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:32:23,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-08-22 01:32:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:23,134 INFO L225 Difference]: With dead ends: 100 [2020-08-22 01:32:23,135 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 01:32:23,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:32:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 01:32:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-22 01:32:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 01:32:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-08-22 01:32:23,141 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-08-22 01:32:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:23,142 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-08-22 01:32:23,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 01:32:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-08-22 01:32:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 01:32:23,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:23,143 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:23,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 01:32:23,143 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:23,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1030916052, now seen corresponding path program 15 times [2020-08-22 01:32:23,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:23,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632218408] [2020-08-22 01:32:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:23,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:23,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:24,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632218408] [2020-08-22 01:32:24,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:24,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 01:32:24,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040183750] [2020-08-22 01:32:24,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 01:32:24,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 01:32:24,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:32:24,378 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 29 states. [2020-08-22 01:32:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:24,752 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-08-22 01:32:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 01:32:24,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-08-22 01:32:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:24,754 INFO L225 Difference]: With dead ends: 102 [2020-08-22 01:32:24,754 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 01:32:24,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:32:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 01:32:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-22 01:32:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 01:32:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-22 01:32:24,760 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-08-22 01:32:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:24,760 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-22 01:32:24,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 01:32:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-22 01:32:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 01:32:24,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:24,761 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:24,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 01:32:24,761 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:24,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1030974506, now seen corresponding path program 16 times [2020-08-22 01:32:24,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:24,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857123771] [2020-08-22 01:32:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:24,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:24,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:26,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857123771] [2020-08-22 01:32:26,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:26,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 01:32:26,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440706127] [2020-08-22 01:32:26,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 01:32:26,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 01:32:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:32:26,027 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-08-22 01:32:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:26,346 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-08-22 01:32:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 01:32:26,346 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-08-22 01:32:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:26,347 INFO L225 Difference]: With dead ends: 104 [2020-08-22 01:32:26,347 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 01:32:26,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:32:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 01:32:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-22 01:32:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 01:32:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-08-22 01:32:26,354 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-08-22 01:32:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:26,354 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-08-22 01:32:26,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 01:32:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-08-22 01:32:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 01:32:26,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:26,355 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:26,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 01:32:26,355 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1767090008, now seen corresponding path program 17 times [2020-08-22 01:32:26,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:26,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028804429] [2020-08-22 01:32:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:26,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:26,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:27,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028804429] [2020-08-22 01:32:27,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:27,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 01:32:27,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783952586] [2020-08-22 01:32:27,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 01:32:27,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 01:32:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:32:27,807 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 31 states. [2020-08-22 01:32:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:28,191 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-08-22 01:32:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 01:32:28,193 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-08-22 01:32:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:28,194 INFO L225 Difference]: With dead ends: 106 [2020-08-22 01:32:28,194 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 01:32:28,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:32:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 01:32:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-22 01:32:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 01:32:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-08-22 01:32:28,199 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-08-22 01:32:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:28,199 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-08-22 01:32:28,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 01:32:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-08-22 01:32:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 01:32:28,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:28,200 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:28,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 01:32:28,201 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2057560666, now seen corresponding path program 18 times [2020-08-22 01:32:28,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:28,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399763366] [2020-08-22 01:32:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:28,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:28,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:29,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399763366] [2020-08-22 01:32:29,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:29,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 01:32:29,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023265691] [2020-08-22 01:32:29,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 01:32:29,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:29,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 01:32:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:32:29,606 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-08-22 01:32:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:30,042 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-08-22 01:32:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 01:32:30,043 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-08-22 01:32:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:30,044 INFO L225 Difference]: With dead ends: 108 [2020-08-22 01:32:30,044 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 01:32:30,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 01:32:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 01:32:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-22 01:32:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 01:32:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-08-22 01:32:30,050 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-08-22 01:32:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:30,050 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-08-22 01:32:30,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 01:32:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-08-22 01:32:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 01:32:30,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:30,051 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:30,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 01:32:30,052 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:30,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2026988764, now seen corresponding path program 19 times [2020-08-22 01:32:30,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:30,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096265001] [2020-08-22 01:32:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:30,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:30,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:31,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096265001] [2020-08-22 01:32:31,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:31,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 01:32:31,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884130466] [2020-08-22 01:32:31,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 01:32:31,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:31,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 01:32:31,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:32:31,547 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 33 states. [2020-08-22 01:32:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:32,015 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-08-22 01:32:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 01:32:32,016 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-08-22 01:32:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:32,017 INFO L225 Difference]: With dead ends: 110 [2020-08-22 01:32:32,017 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 01:32:32,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 01:32:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 01:32:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-22 01:32:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 01:32:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-08-22 01:32:32,024 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-08-22 01:32:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:32,024 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-08-22 01:32:32,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 01:32:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-08-22 01:32:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 01:32:32,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:32,025 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:32,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 01:32:32,026 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1582805282, now seen corresponding path program 20 times [2020-08-22 01:32:32,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:32,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619558026] [2020-08-22 01:32:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:32,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:32,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:33,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619558026] [2020-08-22 01:32:33,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:33,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 01:32:33,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923513608] [2020-08-22 01:32:33,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 01:32:33,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:33,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 01:32:33,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:32:33,627 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-08-22 01:32:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:34,109 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-08-22 01:32:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 01:32:34,109 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-08-22 01:32:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:34,111 INFO L225 Difference]: With dead ends: 112 [2020-08-22 01:32:34,111 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 01:32:34,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:32:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 01:32:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-22 01:32:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 01:32:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-08-22 01:32:34,117 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-08-22 01:32:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:34,118 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-08-22 01:32:34,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 01:32:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-08-22 01:32:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 01:32:34,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:34,119 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:34,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 01:32:34,119 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:34,119 INFO L82 PathProgramCache]: Analyzing trace with hash -261308320, now seen corresponding path program 21 times [2020-08-22 01:32:34,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:34,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364323596] [2020-08-22 01:32:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:34,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:34,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:35,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364323596] [2020-08-22 01:32:35,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:35,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 01:32:35,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248033810] [2020-08-22 01:32:35,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 01:32:35,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:35,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 01:32:35,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 01:32:35,803 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 35 states. [2020-08-22 01:32:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:36,274 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-08-22 01:32:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 01:32:36,275 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-08-22 01:32:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:36,276 INFO L225 Difference]: With dead ends: 114 [2020-08-22 01:32:36,276 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 01:32:36,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 01:32:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 01:32:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-22 01:32:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 01:32:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-08-22 01:32:36,283 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-08-22 01:32:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:36,283 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-08-22 01:32:36,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 01:32:36,284 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-08-22 01:32:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 01:32:36,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:36,284 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:36,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 01:32:36,285 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:36,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047454, now seen corresponding path program 22 times [2020-08-22 01:32:36,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:36,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934558704] [2020-08-22 01:32:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:36,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:36,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:38,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934558704] [2020-08-22 01:32:38,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:38,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 01:32:38,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276830709] [2020-08-22 01:32:38,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 01:32:38,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:38,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 01:32:38,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 01:32:38,191 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-08-22 01:32:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:38,545 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-08-22 01:32:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 01:32:38,545 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-08-22 01:32:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:38,546 INFO L225 Difference]: With dead ends: 116 [2020-08-22 01:32:38,547 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 01:32:38,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 01:32:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 01:32:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-22 01:32:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 01:32:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-08-22 01:32:38,553 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-08-22 01:32:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:38,554 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-08-22 01:32:38,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 01:32:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-08-22 01:32:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 01:32:38,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:38,554 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:38,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 01:32:38,555 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash 740735460, now seen corresponding path program 23 times [2020-08-22 01:32:38,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:38,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992819900] [2020-08-22 01:32:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:38,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:38,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:40,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992819900] [2020-08-22 01:32:40,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:40,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 01:32:40,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191441483] [2020-08-22 01:32:40,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 01:32:40,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:40,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 01:32:40,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:32:40,422 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 37 states. [2020-08-22 01:32:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:40,935 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-08-22 01:32:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 01:32:40,935 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-08-22 01:32:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:40,937 INFO L225 Difference]: With dead ends: 118 [2020-08-22 01:32:40,937 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 01:32:40,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=643, Invalid=917, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 01:32:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 01:32:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-22 01:32:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 01:32:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-08-22 01:32:40,943 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-08-22 01:32:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:40,944 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-08-22 01:32:40,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 01:32:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-08-22 01:32:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 01:32:40,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:40,945 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:40,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 01:32:40,945 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash -721649178, now seen corresponding path program 24 times [2020-08-22 01:32:40,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:40,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190151043] [2020-08-22 01:32:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:41,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:41,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:42,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190151043] [2020-08-22 01:32:42,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:42,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 01:32:42,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363068529] [2020-08-22 01:32:42,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 01:32:42,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:42,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 01:32:42,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 01:32:42,946 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-08-22 01:32:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:43,389 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-08-22 01:32:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 01:32:43,390 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-08-22 01:32:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:43,391 INFO L225 Difference]: With dead ends: 120 [2020-08-22 01:32:43,391 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 01:32:43,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=679, Invalid=961, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:32:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 01:32:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-22 01:32:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 01:32:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-08-22 01:32:43,397 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-08-22 01:32:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:43,397 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-08-22 01:32:43,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 01:32:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-08-22 01:32:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 01:32:43,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:43,398 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:43,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 01:32:43,398 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1618980504, now seen corresponding path program 25 times [2020-08-22 01:32:43,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:43,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729487440] [2020-08-22 01:32:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:43,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:43,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:45,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729487440] [2020-08-22 01:32:45,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:45,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 01:32:45,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825862663] [2020-08-22 01:32:45,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 01:32:45,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 01:32:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 01:32:45,497 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 39 states. [2020-08-22 01:32:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:45,850 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-08-22 01:32:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 01:32:45,850 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-08-22 01:32:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:45,851 INFO L225 Difference]: With dead ends: 122 [2020-08-22 01:32:45,851 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 01:32:45,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 01:32:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 01:32:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-22 01:32:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 01:32:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-08-22 01:32:45,857 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-08-22 01:32:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:45,857 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-08-22 01:32:45,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 01:32:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-08-22 01:32:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 01:32:45,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:45,858 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:45,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 01:32:45,858 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash -665958294, now seen corresponding path program 26 times [2020-08-22 01:32:45,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:45,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894781205] [2020-08-22 01:32:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:45,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:45,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:48,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894781205] [2020-08-22 01:32:48,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:48,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 01:32:48,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412698160] [2020-08-22 01:32:48,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 01:32:48,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:48,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 01:32:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 01:32:48,044 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 40 states. [2020-08-22 01:32:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:48,376 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-08-22 01:32:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 01:32:48,377 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-08-22 01:32:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:48,378 INFO L225 Difference]: With dead ends: 124 [2020-08-22 01:32:48,378 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 01:32:48,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=754, Invalid=1052, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 01:32:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 01:32:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-22 01:32:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 01:32:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-08-22 01:32:48,384 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-08-22 01:32:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:48,384 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-08-22 01:32:48,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 01:32:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-08-22 01:32:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 01:32:48,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:48,385 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:48,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 01:32:48,385 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:48,386 INFO L82 PathProgramCache]: Analyzing trace with hash 360351468, now seen corresponding path program 27 times [2020-08-22 01:32:48,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:48,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406275704] [2020-08-22 01:32:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:48,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:50,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406275704] [2020-08-22 01:32:50,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:50,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 01:32:50,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055171439] [2020-08-22 01:32:50,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 01:32:50,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:50,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 01:32:50,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:32:50,662 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 41 states. [2020-08-22 01:32:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:51,019 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-08-22 01:32:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 01:32:51,020 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-08-22 01:32:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:51,021 INFO L225 Difference]: With dead ends: 126 [2020-08-22 01:32:51,021 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 01:32:51,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 01:32:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 01:32:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-22 01:32:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 01:32:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-08-22 01:32:51,027 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-08-22 01:32:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:51,027 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-08-22 01:32:51,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 01:32:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-08-22 01:32:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 01:32:51,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:51,028 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:51,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 01:32:51,028 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:51,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1198445330, now seen corresponding path program 28 times [2020-08-22 01:32:51,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:51,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725508731] [2020-08-22 01:32:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:51,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:51,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:53,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725508731] [2020-08-22 01:32:53,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:53,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 01:32:53,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922067388] [2020-08-22 01:32:53,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 01:32:53,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:53,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 01:32:53,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 01:32:53,464 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 42 states. [2020-08-22 01:32:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:53,929 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-08-22 01:32:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 01:32:53,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-08-22 01:32:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:53,931 INFO L225 Difference]: With dead ends: 128 [2020-08-22 01:32:53,931 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 01:32:53,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=1147, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 01:32:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 01:32:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-22 01:32:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 01:32:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-08-22 01:32:53,938 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-08-22 01:32:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:53,938 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-08-22 01:32:53,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 01:32:53,938 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-08-22 01:32:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 01:32:53,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:53,939 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:53,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 01:32:53,939 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash -258581904, now seen corresponding path program 29 times [2020-08-22 01:32:53,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:53,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731384912] [2020-08-22 01:32:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:54,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:54,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:56,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731384912] [2020-08-22 01:32:56,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:56,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 01:32:56,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971821953] [2020-08-22 01:32:56,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 01:32:56,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:56,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 01:32:56,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 01:32:56,424 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 43 states. [2020-08-22 01:32:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:57,026 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-08-22 01:32:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 01:32:57,027 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-08-22 01:32:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:57,028 INFO L225 Difference]: With dead ends: 130 [2020-08-22 01:32:57,028 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 01:32:57,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=874, Invalid=1196, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 01:32:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 01:32:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-22 01:32:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 01:32:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-08-22 01:32:57,035 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-08-22 01:32:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:57,035 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-08-22 01:32:57,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 01:32:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-08-22 01:32:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-22 01:32:57,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:57,036 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:57,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 01:32:57,037 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:57,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1007038322, now seen corresponding path program 30 times [2020-08-22 01:32:57,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:57,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591617584] [2020-08-22 01:32:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:32:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:32:59,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591617584] [2020-08-22 01:32:59,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:59,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 01:32:59,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529768887] [2020-08-22 01:32:59,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 01:32:59,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:59,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 01:32:59,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 01:32:59,676 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 44 states. [2020-08-22 01:33:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:00,064 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-08-22 01:33:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 01:33:00,064 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 102 [2020-08-22 01:33:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:00,066 INFO L225 Difference]: With dead ends: 132 [2020-08-22 01:33:00,066 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 01:33:00,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=916, Invalid=1246, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 01:33:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 01:33:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-08-22 01:33:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 01:33:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-08-22 01:33:00,073 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2020-08-22 01:33:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:00,073 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-08-22 01:33:00,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 01:33:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-08-22 01:33:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 01:33:00,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:00,074 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:00,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 01:33:00,074 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1792330740, now seen corresponding path program 31 times [2020-08-22 01:33:00,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:00,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378731250] [2020-08-22 01:33:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:00,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:33:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat