/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=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:33:37,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:33:37,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:33:37,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 00:33:37,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 00:33:37,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 00:33:37,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 00:33:37,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 00:33:37,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 00:33:37,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 00:33:37,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 00:33:37,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 00:33:37,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:33:37,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:33:37,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:33:37,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:33:37,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:33:37,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:33:37,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:33:37,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:33:37,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:33:37,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:33:37,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:33:37,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:33:37,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 00:33:37,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 00:33:37,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 00:33:37,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 00:33:37,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 00:33:37,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 00:33:37,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:33:37,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:33:37,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:33:37,788 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 00:33:37,834 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:33:37,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:33:37,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:33:37,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:33:37,837 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:33:37,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:33:37,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:33:37,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:33:37,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:33:37,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:33:37,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:33:37,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:33:37,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:33:37,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:33:37,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:33:37,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:33:37,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:33:37,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:33:37,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:33:37,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:33:37,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:33:37,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:33:37,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:33:37,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:33:37,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:33:37,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:33:37,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:33:37,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:33:37,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:33:37,844 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=0.6;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=0.6;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=0.6;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=0.6;log-additional-information=true; [2020-08-22 00:33:38,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:33:38,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:33:38,166 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:33:38,168 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:33:38,168 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:33:38,169 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 00:33:38,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/618452da5/99376d086bbd4936bac0cbb4eb876adb/FLAG5d8ed225a [2020-08-22 00:33:38,748 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:33:38,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 00:33:38,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/618452da5/99376d086bbd4936bac0cbb4eb876adb/FLAG5d8ed225a [2020-08-22 00:33:39,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/618452da5/99376d086bbd4936bac0cbb4eb876adb [2020-08-22 00:33:39,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:33:39,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:33:39,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:33:39,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:33:39,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:33:39,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9ac829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39, skipping insertion in model container [2020-08-22 00:33:39,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:33:39,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:33:39,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:33:39,359 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:33:39,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:33:39,495 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:33:39,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39 WrapperNode [2020-08-22 00:33:39,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:33:39,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:33:39,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:33:39,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:33:39,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (1/1) ... [2020-08-22 00:33:39,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:33:39,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:33:39,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:33:39,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:33:39,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (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 00:33:39,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:33:39,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:33:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 00:33:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 00:33:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 00:33:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 00:33:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:33:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:33:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 00:33:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 00:33:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 00:33:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 00:33:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 00:33:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 00:33:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:33:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:33:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:33:40,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:33:40,060 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 00:33:40,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:33:40 BoogieIcfgContainer [2020-08-22 00:33:40,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:33:40,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:33:40,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:33:40,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:33:40,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:33:39" (1/3) ... [2020-08-22 00:33:40,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7487b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:33:40, skipping insertion in model container [2020-08-22 00:33:40,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:33:39" (2/3) ... [2020-08-22 00:33:40,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7487b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:33:40, skipping insertion in model container [2020-08-22 00:33:40,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:33:40" (3/3) ... [2020-08-22 00:33:40,073 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-22 00:33:40,083 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:33:40,091 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:33:40,105 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:33:40,125 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:33:40,125 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:33:40,126 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:33:40,126 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:33:40,126 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:33:40,126 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:33:40,126 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:33:40,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:33:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 00:33:40,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 00:33:40,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:40,153 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:40,153 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:40,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-22 00:33:40,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:40,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56948481] [2020-08-22 00:33:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 00:33:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 00:33:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 00:33:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:40,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56948481] [2020-08-22 00:33:40,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:40,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 00:33:40,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991544099] [2020-08-22 00:33:40,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:33:40,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:33:40,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:33:40,577 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-22 00:33:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:40,738 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-22 00:33:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:33:40,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-22 00:33:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:40,753 INFO L225 Difference]: With dead ends: 136 [2020-08-22 00:33:40,754 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 00:33:40,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 00:33:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 00:33:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-22 00:33:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 00:33:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-22 00:33:40,815 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-22 00:33:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:40,816 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-22 00:33:40,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:33:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-22 00:33:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 00:33:40,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:40,820 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:40,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:33:40,824 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-22 00:33:40,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:40,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417148760] [2020-08-22 00:33:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:33:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 00:33:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:33:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:40,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417148760] [2020-08-22 00:33:40,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:40,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 00:33:40,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284401165] [2020-08-22 00:33:40,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:33:40,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:40,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:33:40,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:33:40,944 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-22 00:33:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:41,041 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-22 00:33:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 00:33:41,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-22 00:33:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:41,045 INFO L225 Difference]: With dead ends: 129 [2020-08-22 00:33:41,045 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 00:33:41,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 00:33:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 00:33:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-22 00:33:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 00:33:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-22 00:33:41,064 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-22 00:33:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:41,064 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-22 00:33:41,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:33:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-22 00:33:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 00:33:41,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:41,067 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:41,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:33:41,068 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-22 00:33:41,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:41,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905363439] [2020-08-22 00:33:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 00:33:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 00:33:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 00:33:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:41,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905363439] [2020-08-22 00:33:41,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:41,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 00:33:41,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733817252] [2020-08-22 00:33:41,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:33:41,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:41,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:33:41,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:33:41,317 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-22 00:33:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:41,450 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-22 00:33:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 00:33:41,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-22 00:33:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:41,452 INFO L225 Difference]: With dead ends: 145 [2020-08-22 00:33:41,453 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 00:33:41,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:33:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 00:33:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-22 00:33:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 00:33:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-22 00:33:41,469 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-22 00:33:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:41,469 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-22 00:33:41,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:33:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-22 00:33:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 00:33:41,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:41,472 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:41,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:33:41,473 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-22 00:33:41,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:41,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369896184] [2020-08-22 00:33:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 00:33:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 00:33:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 00:33:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:41,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369896184] [2020-08-22 00:33:41,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:41,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 00:33:41,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357043683] [2020-08-22 00:33:41,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:33:41,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:41,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:33:41,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:33:41,568 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-22 00:33:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:41,653 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-22 00:33:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 00:33:41,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-22 00:33:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:41,656 INFO L225 Difference]: With dead ends: 156 [2020-08-22 00:33:41,656 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 00:33:41,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:33:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 00:33:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-22 00:33:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 00:33:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-22 00:33:41,673 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-22 00:33:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:41,674 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-22 00:33:41,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:33:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-22 00:33:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 00:33:41,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:41,679 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:41,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:33:41,679 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-22 00:33:41,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:41,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080472229] [2020-08-22 00:33:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 00:33:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 00:33:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 00:33:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:41,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080472229] [2020-08-22 00:33:41,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:41,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 00:33:41,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741992822] [2020-08-22 00:33:41,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:33:41,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:41,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:33:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:33:41,914 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-22 00:33:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:42,074 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-22 00:33:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:33:42,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-22 00:33:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:42,079 INFO L225 Difference]: With dead ends: 166 [2020-08-22 00:33:42,079 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 00:33:42,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:33:42,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 00:33:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-22 00:33:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 00:33:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-22 00:33:42,107 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-22 00:33:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:42,108 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-22 00:33:42,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:33:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-22 00:33:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 00:33:42,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:42,118 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:42,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:33:42,119 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-22 00:33:42,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:42,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824062334] [2020-08-22 00:33:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 00:33:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 00:33:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 00:33:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:42,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824062334] [2020-08-22 00:33:42,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:42,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 00:33:42,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271837175] [2020-08-22 00:33:42,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:33:42,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:33:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:33:42,277 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-22 00:33:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:42,365 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 00:33:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:33:42,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-22 00:33:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:42,367 INFO L225 Difference]: With dead ends: 176 [2020-08-22 00:33:42,367 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 00:33:42,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:33:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 00:33:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-22 00:33:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 00:33:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-22 00:33:42,380 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-22 00:33:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:42,381 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-22 00:33:42,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:33:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-22 00:33:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 00:33:42,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:42,383 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:42,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:33:42,383 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-22 00:33:42,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:42,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542870710] [2020-08-22 00:33:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 00:33:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:33:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 00:33:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:42,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542870710] [2020-08-22 00:33:42,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:42,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:33:42,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672279822] [2020-08-22 00:33:42,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:33:42,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:42,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:33:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:33:42,538 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-22 00:33:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:42,690 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-22 00:33:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 00:33:42,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-22 00:33:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:42,692 INFO L225 Difference]: With dead ends: 178 [2020-08-22 00:33:42,692 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 00:33:42,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:33:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 00:33:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-22 00:33:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 00:33:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-22 00:33:42,705 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-22 00:33:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:42,706 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-22 00:33:42,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:33:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-22 00:33:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 00:33:42,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:42,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:42,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:33:42,708 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-22 00:33:42,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:42,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911772250] [2020-08-22 00:33:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 00:33:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 00:33:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 00:33:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:42,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911772250] [2020-08-22 00:33:42,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:42,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:33:42,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287905669] [2020-08-22 00:33:42,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:33:42,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:42,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:33:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:33:42,817 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-22 00:33:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:42,918 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-22 00:33:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 00:33:42,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-22 00:33:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:42,920 INFO L225 Difference]: With dead ends: 193 [2020-08-22 00:33:42,920 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 00:33:42,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:33:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 00:33:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-22 00:33:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 00:33:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-22 00:33:42,932 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-22 00:33:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:42,933 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-22 00:33:42,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:33:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-22 00:33:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 00:33:42,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:42,934 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:42,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:33:42,935 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-22 00:33:42,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:42,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781299802] [2020-08-22 00:33:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:42,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 00:33:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 00:33:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 00:33:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:43,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781299802] [2020-08-22 00:33:43,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:43,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 00:33:43,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070126252] [2020-08-22 00:33:43,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:33:43,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:33:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:33:43,132 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-22 00:33:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:43,347 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-22 00:33:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:33:43,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-22 00:33:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:43,350 INFO L225 Difference]: With dead ends: 190 [2020-08-22 00:33:43,350 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 00:33:43,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:33:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 00:33:43,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-22 00:33:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 00:33:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-22 00:33:43,362 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-22 00:33:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:43,363 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-22 00:33:43,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:33:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-22 00:33:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 00:33:43,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:43,364 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:43,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:33:43,364 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-22 00:33:43,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:43,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731546986] [2020-08-22 00:33:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 00:33:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 00:33:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:33:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:43,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731546986] [2020-08-22 00:33:43,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:43,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 00:33:43,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607228983] [2020-08-22 00:33:43,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:33:43,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:33:43,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:33:43,492 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-22 00:33:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:43,615 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-22 00:33:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:33:43,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 00:33:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:43,618 INFO L225 Difference]: With dead ends: 210 [2020-08-22 00:33:43,618 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 00:33:43,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:33:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 00:33:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-22 00:33:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 00:33:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-22 00:33:43,630 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-22 00:33:43,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:43,630 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-22 00:33:43,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:33:43,630 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-22 00:33:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 00:33:43,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:43,632 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:43,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:33:43,632 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-22 00:33:43,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:43,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083405212] [2020-08-22 00:33:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 00:33:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 00:33:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 00:33:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:43,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083405212] [2020-08-22 00:33:43,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:43,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:33:43,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106261003] [2020-08-22 00:33:43,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:33:43,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:33:43,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:33:43,837 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-22 00:33:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:44,001 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-22 00:33:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:33:44,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 00:33:44,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:44,003 INFO L225 Difference]: With dead ends: 202 [2020-08-22 00:33:44,004 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 00:33:44,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:33:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 00:33:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-22 00:33:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 00:33:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-22 00:33:44,014 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-22 00:33:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:44,015 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-22 00:33:44,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:33:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-22 00:33:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 00:33:44,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:44,016 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:44,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 00:33:44,017 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-22 00:33:44,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:44,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73363884] [2020-08-22 00:33:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:33:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 00:33:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 00:33:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:44,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73363884] [2020-08-22 00:33:44,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:44,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:33:44,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596584370] [2020-08-22 00:33:44,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:33:44,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:44,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:33:44,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:33:44,136 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-22 00:33:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:44,259 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-22 00:33:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:33:44,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 00:33:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:44,261 INFO L225 Difference]: With dead ends: 227 [2020-08-22 00:33:44,262 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 00:33:44,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:33:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 00:33:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-22 00:33:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 00:33:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-22 00:33:44,274 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-22 00:33:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:44,275 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-22 00:33:44,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:33:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-22 00:33:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 00:33:44,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:44,276 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:44,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 00:33:44,276 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-22 00:33:44,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:44,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9086927] [2020-08-22 00:33:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 00:33:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 00:33:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 00:33:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:44,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9086927] [2020-08-22 00:33:44,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:44,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:33:44,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364537832] [2020-08-22 00:33:44,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:33:44,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:44,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:33:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:33:44,460 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-22 00:33:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:44,698 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-22 00:33:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:33:44,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-22 00:33:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:44,701 INFO L225 Difference]: With dead ends: 214 [2020-08-22 00:33:44,701 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 00:33:44,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:33:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 00:33:44,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-22 00:33:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 00:33:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-22 00:33:44,727 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-22 00:33:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:44,728 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-22 00:33:44,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:33:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-22 00:33:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 00:33:44,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:44,729 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:44,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 00:33:44,730 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-22 00:33:44,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:44,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930650422] [2020-08-22 00:33:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 00:33:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:33:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 00:33:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:44,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930650422] [2020-08-22 00:33:44,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:44,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:33:44,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255447993] [2020-08-22 00:33:44,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:33:44,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:44,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:33:44,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:33:44,878 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-22 00:33:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:45,019 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-22 00:33:45,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:33:45,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 00:33:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:45,021 INFO L225 Difference]: With dead ends: 244 [2020-08-22 00:33:45,021 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 00:33:45,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:33:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 00:33:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-22 00:33:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 00:33:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-22 00:33:45,033 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-22 00:33:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:45,033 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-22 00:33:45,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:33:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-22 00:33:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 00:33:45,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:45,034 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:45,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 00:33:45,035 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:45,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-22 00:33:45,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:45,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171633827] [2020-08-22 00:33:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 00:33:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:33:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 00:33:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:45,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171633827] [2020-08-22 00:33:45,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:45,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 00:33:45,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516524764] [2020-08-22 00:33:45,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 00:33:45,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 00:33:45,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:33:45,263 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-22 00:33:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:45,526 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-22 00:33:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 00:33:45,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-22 00:33:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:45,528 INFO L225 Difference]: With dead ends: 226 [2020-08-22 00:33:45,528 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 00:33:45,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:33:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 00:33:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-22 00:33:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 00:33:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-22 00:33:45,547 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-22 00:33:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:45,547 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-22 00:33:45,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 00:33:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-22 00:33:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 00:33:45,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:45,548 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:45,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 00:33:45,549 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-22 00:33:45,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:45,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829738281] [2020-08-22 00:33:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 00:33:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 00:33:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 00:33:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:45,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829738281] [2020-08-22 00:33:45,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:45,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 00:33:45,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337744878] [2020-08-22 00:33:45,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 00:33:45,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 00:33:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:33:45,749 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-22 00:33:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:45,947 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-22 00:33:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 00:33:45,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-22 00:33:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:45,951 INFO L225 Difference]: With dead ends: 261 [2020-08-22 00:33:45,951 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 00:33:45,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:33:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 00:33:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-22 00:33:45,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 00:33:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-22 00:33:45,970 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-22 00:33:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:45,976 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-22 00:33:45,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 00:33:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-22 00:33:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 00:33:45,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:45,980 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:45,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 00:33:45,980 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:45,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:45,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-22 00:33:45,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:45,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207997992] [2020-08-22 00:33:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 00:33:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 00:33:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 00:33:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:46,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207997992] [2020-08-22 00:33:46,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:46,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 00:33:46,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676883506] [2020-08-22 00:33:46,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 00:33:46,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 00:33:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:33:46,359 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-22 00:33:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:46,677 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-22 00:33:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 00:33:46,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-22 00:33:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:46,680 INFO L225 Difference]: With dead ends: 238 [2020-08-22 00:33:46,680 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 00:33:46,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:33:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 00:33:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-22 00:33:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 00:33:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-22 00:33:46,693 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-22 00:33:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:46,694 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-22 00:33:46,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 00:33:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-22 00:33:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 00:33:46,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:46,697 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:46,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 00:33:46,698 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-22 00:33:46,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:46,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482400717] [2020-08-22 00:33:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 00:33:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 00:33:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 00:33:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:46,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482400717] [2020-08-22 00:33:46,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:46,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 00:33:46,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595905288] [2020-08-22 00:33:46,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 00:33:46,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:46,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 00:33:46,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:33:46,931 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-22 00:33:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:47,124 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-22 00:33:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 00:33:47,125 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-22 00:33:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:47,126 INFO L225 Difference]: With dead ends: 278 [2020-08-22 00:33:47,127 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 00:33:47,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:33:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 00:33:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-22 00:33:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 00:33:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-22 00:33:47,139 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-22 00:33:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:47,139 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-22 00:33:47,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 00:33:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-22 00:33:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 00:33:47,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:47,141 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:47,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 00:33:47,141 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:47,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-22 00:33:47,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:47,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224969204] [2020-08-22 00:33:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 00:33:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 00:33:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 00:33:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:47,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224969204] [2020-08-22 00:33:47,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:47,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 00:33:47,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473444304] [2020-08-22 00:33:47,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 00:33:47,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:47,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 00:33:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:33:47,432 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-22 00:33:47,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:47,733 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-22 00:33:47,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 00:33:47,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-22 00:33:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:47,735 INFO L225 Difference]: With dead ends: 250 [2020-08-22 00:33:47,735 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 00:33:47,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:33:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 00:33:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-22 00:33:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 00:33:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-22 00:33:47,746 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-22 00:33:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:47,747 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-22 00:33:47,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 00:33:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-22 00:33:47,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 00:33:47,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:47,748 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:47,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 00:33:47,748 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-22 00:33:47,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:47,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685272923] [2020-08-22 00:33:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:33:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 00:33:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 00:33:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:47,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685272923] [2020-08-22 00:33:47,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:47,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 00:33:47,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549413474] [2020-08-22 00:33:47,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 00:33:47,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:47,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 00:33:47,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:33:47,957 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-22 00:33:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:48,115 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-22 00:33:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 00:33:48,115 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-22 00:33:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:48,117 INFO L225 Difference]: With dead ends: 295 [2020-08-22 00:33:48,117 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 00:33:48,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:33:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 00:33:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-22 00:33:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 00:33:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-22 00:33:48,129 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-22 00:33:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:48,130 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-22 00:33:48,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 00:33:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-22 00:33:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 00:33:48,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:48,131 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:48,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 00:33:48,132 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:48,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:48,132 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-22 00:33:48,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:48,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148865533] [2020-08-22 00:33:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 00:33:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 00:33:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 00:33:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:48,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148865533] [2020-08-22 00:33:48,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:48,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 00:33:48,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363732856] [2020-08-22 00:33:48,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 00:33:48,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 00:33:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:33:48,436 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-22 00:33:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:48,887 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-22 00:33:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 00:33:48,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-22 00:33:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:48,890 INFO L225 Difference]: With dead ends: 262 [2020-08-22 00:33:48,890 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 00:33:48,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 00:33:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 00:33:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-22 00:33:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 00:33:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-22 00:33:48,905 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-22 00:33:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:48,905 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-22 00:33:48,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 00:33:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-22 00:33:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 00:33:48,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:48,907 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:48,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 00:33:48,909 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:48,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-22 00:33:48,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:48,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854115714] [2020-08-22 00:33:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:48,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 00:33:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 00:33:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:33:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:49,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854115714] [2020-08-22 00:33:49,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:49,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 00:33:49,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511686565] [2020-08-22 00:33:49,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 00:33:49,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:49,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 00:33:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:33:49,165 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-22 00:33:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:49,391 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-22 00:33:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 00:33:49,392 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-22 00:33:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:49,394 INFO L225 Difference]: With dead ends: 312 [2020-08-22 00:33:49,394 INFO L226 Difference]: Without dead ends: 222 [2020-08-22 00:33:49,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 00:33:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-22 00:33:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-22 00:33:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 00:33:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-22 00:33:49,408 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-22 00:33:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:49,408 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-22 00:33:49,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 00:33:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-22 00:33:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 00:33:49,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:49,410 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:49,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 00:33:49,410 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:49,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-22 00:33:49,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:49,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798386489] [2020-08-22 00:33:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 00:33:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 00:33:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 00:33:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:49,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798386489] [2020-08-22 00:33:49,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:49,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 00:33:49,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728429188] [2020-08-22 00:33:49,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 00:33:49,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:49,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 00:33:49,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 00:33:49,753 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-22 00:33:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:50,223 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-22 00:33:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 00:33:50,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-22 00:33:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:50,226 INFO L225 Difference]: With dead ends: 274 [2020-08-22 00:33:50,226 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 00:33:50,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-22 00:33:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 00:33:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-22 00:33:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 00:33:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-22 00:33:50,253 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-22 00:33:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:50,254 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-22 00:33:50,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 00:33:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-22 00:33:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 00:33:50,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:50,255 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:50,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 00:33:50,256 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-22 00:33:50,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:50,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207367842] [2020-08-22 00:33:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 00:33:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 00:33:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 00:33:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:50,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207367842] [2020-08-22 00:33:50,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:50,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 00:33:50,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148351717] [2020-08-22 00:33:50,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 00:33:50,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:50,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 00:33:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 00:33:50,513 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-22 00:33:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:50,704 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-22 00:33:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 00:33:50,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-22 00:33:50,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:50,707 INFO L225 Difference]: With dead ends: 329 [2020-08-22 00:33:50,707 INFO L226 Difference]: Without dead ends: 236 [2020-08-22 00:33:50,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 00:33:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-22 00:33:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-22 00:33:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 00:33:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-22 00:33:50,721 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-22 00:33:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:50,721 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-22 00:33:50,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 00:33:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-22 00:33:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 00:33:50,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:50,723 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:50,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 00:33:50,726 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-22 00:33:50,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:50,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700069037] [2020-08-22 00:33:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:50,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 00:33:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 00:33:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 00:33:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:51,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700069037] [2020-08-22 00:33:51,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:51,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 00:33:51,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377922610] [2020-08-22 00:33:51,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 00:33:51,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:51,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 00:33:51,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 00:33:51,140 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-22 00:33:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:51,648 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-22 00:33:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 00:33:51,648 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-22 00:33:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:51,650 INFO L225 Difference]: With dead ends: 286 [2020-08-22 00:33:51,650 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 00:33:51,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:33:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 00:33:51,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-22 00:33:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 00:33:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-22 00:33:51,666 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-22 00:33:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:51,667 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-22 00:33:51,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 00:33:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-22 00:33:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 00:33:51,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:51,669 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:51,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 00:33:51,670 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:51,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:51,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-22 00:33:51,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:51,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083259435] [2020-08-22 00:33:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 00:33:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 00:33:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 00:33:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:51,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083259435] [2020-08-22 00:33:51,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:51,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 00:33:51,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89244897] [2020-08-22 00:33:51,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 00:33:51,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 00:33:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 00:33:51,969 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-22 00:33:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:52,195 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-22 00:33:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 00:33:52,196 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-22 00:33:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:52,198 INFO L225 Difference]: With dead ends: 346 [2020-08-22 00:33:52,198 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 00:33:52,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:33:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 00:33:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-22 00:33:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 00:33:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-22 00:33:52,212 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-22 00:33:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:52,212 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-22 00:33:52,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 00:33:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-22 00:33:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 00:33:52,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:52,214 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:52,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 00:33:52,214 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:52,214 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-22 00:33:52,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:52,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885548343] [2020-08-22 00:33:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 00:33:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:33:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 00:33:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 00:33:52,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885548343] [2020-08-22 00:33:52,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:33:52,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:33:52,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938074301] [2020-08-22 00:33:52,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:33:52,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:33:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:33:52,293 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-22 00:33:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:52,310 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-22 00:33:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:33:52,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 00:33:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:52,312 INFO L225 Difference]: With dead ends: 160 [2020-08-22 00:33:52,312 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 00:33:52,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:33:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 00:33:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 00:33:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 00:33:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-22 00:33:52,325 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-22 00:33:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:52,325 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-22 00:33:52,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:33:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-22 00:33:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 00:33:52,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:52,327 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:52,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 00:33:52,327 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-22 00:33:52,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:52,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102736410] [2020-08-22 00:33:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 00:33:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:33:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 00:33:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 00:33:52,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102736410] [2020-08-22 00:33:52,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:33:52,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:33:52,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756061875] [2020-08-22 00:33:52,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:33:52,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:52,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:33:52,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:33:52,397 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-22 00:33:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:52,430 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-22 00:33:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 00:33:52,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-22 00:33:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:52,435 INFO L225 Difference]: With dead ends: 161 [2020-08-22 00:33:52,435 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 00:33:52,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 00:33:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 00:33:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 00:33:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 00:33:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-22 00:33:52,450 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-22 00:33:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:52,451 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-22 00:33:52,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:33:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-22 00:33:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 00:33:52,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:52,453 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:52,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 00:33:52,453 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-22 00:33:52,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:52,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103153623] [2020-08-22 00:33:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 00:33:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:33:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 00:33:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:52,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103153623] [2020-08-22 00:33:52,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:52,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 00:33:52,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666558083] [2020-08-22 00:33:52,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 00:33:52,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 00:33:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:33:52,924 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-22 00:33:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:53,768 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-22 00:33:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 00:33:53,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-22 00:33:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:53,774 INFO L225 Difference]: With dead ends: 298 [2020-08-22 00:33:53,774 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 00:33:53,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-22 00:33:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 00:33:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-22 00:33:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 00:33:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-22 00:33:53,794 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-22 00:33:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:53,794 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-22 00:33:53,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 00:33:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-22 00:33:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 00:33:53,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:53,796 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:53,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 00:33:53,796 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-22 00:33:53,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:53,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416751948] [2020-08-22 00:33:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:53,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:53,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:53,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 00:33:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 00:33:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 00:33:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:54,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416751948] [2020-08-22 00:33:54,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:54,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 00:33:54,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412748631] [2020-08-22 00:33:54,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 00:33:54,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:54,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 00:33:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:33:54,127 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-22 00:33:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:54,445 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-22 00:33:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 00:33:54,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-22 00:33:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:54,448 INFO L225 Difference]: With dead ends: 363 [2020-08-22 00:33:54,448 INFO L226 Difference]: Without dead ends: 264 [2020-08-22 00:33:54,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 00:33:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-22 00:33:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-22 00:33:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 00:33:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-22 00:33:54,465 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-22 00:33:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:54,466 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-22 00:33:54,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 00:33:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-22 00:33:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 00:33:54,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:54,468 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:54,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 00:33:54,468 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-22 00:33:54,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:54,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325788579] [2020-08-22 00:33:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 00:33:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 00:33:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 00:33:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:54,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325788579] [2020-08-22 00:33:54,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:54,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 00:33:54,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680999194] [2020-08-22 00:33:54,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 00:33:54,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 00:33:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 00:33:54,923 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-22 00:33:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:55,718 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-22 00:33:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 00:33:55,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-22 00:33:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:55,722 INFO L225 Difference]: With dead ends: 310 [2020-08-22 00:33:55,723 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 00:33:55,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-22 00:33:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 00:33:55,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-22 00:33:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 00:33:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-22 00:33:55,739 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-22 00:33:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:55,739 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-22 00:33:55,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 00:33:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-22 00:33:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 00:33:55,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:55,741 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:55,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 00:33:55,741 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:55,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-22 00:33:55,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:55,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655329887] [2020-08-22 00:33:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:55,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:55,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:55,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 00:33:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 00:33:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 00:33:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:56,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655329887] [2020-08-22 00:33:56,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:56,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 00:33:56,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116493470] [2020-08-22 00:33:56,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 00:33:56,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 00:33:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 00:33:56,208 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-22 00:33:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:56,475 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-22 00:33:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 00:33:56,476 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-22 00:33:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:56,479 INFO L225 Difference]: With dead ends: 380 [2020-08-22 00:33:56,479 INFO L226 Difference]: Without dead ends: 278 [2020-08-22 00:33:56,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 00:33:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-22 00:33:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-22 00:33:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 00:33:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-22 00:33:56,499 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-22 00:33:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:56,500 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-22 00:33:56,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 00:33:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-22 00:33:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 00:33:56,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:56,502 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:56,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 00:33:56,502 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:56,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-22 00:33:56,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:56,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361877250] [2020-08-22 00:33:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 00:33:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 00:33:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:56,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 00:33:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:57,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361877250] [2020-08-22 00:33:57,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:57,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 00:33:57,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846040660] [2020-08-22 00:33:57,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 00:33:57,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:57,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 00:33:57,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 00:33:57,025 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-22 00:33:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:57,829 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-22 00:33:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 00:33:57,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 00:33:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:57,840 INFO L225 Difference]: With dead ends: 322 [2020-08-22 00:33:57,841 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 00:33:57,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-22 00:33:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 00:33:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-22 00:33:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 00:33:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-22 00:33:57,866 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-22 00:33:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:57,866 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-22 00:33:57,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 00:33:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-22 00:33:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 00:33:57,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:57,868 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:57,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 00:33:57,868 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:57,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:57,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-22 00:33:57,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:57,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535247333] [2020-08-22 00:33:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:57,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:57,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:57,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:58,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:33:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:58,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 00:33:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:58,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 00:33:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:58,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535247333] [2020-08-22 00:33:58,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:58,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 00:33:58,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477735341] [2020-08-22 00:33:58,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 00:33:58,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:58,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 00:33:58,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 00:33:58,277 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-22 00:33:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:33:58,578 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-22 00:33:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 00:33:58,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-22 00:33:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:33:58,581 INFO L225 Difference]: With dead ends: 397 [2020-08-22 00:33:58,581 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 00:33:58,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 00:33:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 00:33:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-22 00:33:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 00:33:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-22 00:33:58,602 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-22 00:33:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:33:58,604 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-22 00:33:58,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 00:33:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-22 00:33:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 00:33:58,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:33:58,606 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:33:58,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 00:33:58,606 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:33:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:33:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-22 00:33:58,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:33:58,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743582218] [2020-08-22 00:33:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:33:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:58,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:33:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:58,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:33:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:58,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:33:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:59,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 00:33:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:59,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 00:33:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:59,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 00:33:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:33:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:33:59,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743582218] [2020-08-22 00:33:59,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:33:59,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 00:33:59,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630995192] [2020-08-22 00:33:59,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 00:33:59,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:33:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 00:33:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 00:33:59,257 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-22 00:34:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:00,167 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-22 00:34:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 00:34:00,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-22 00:34:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:00,171 INFO L225 Difference]: With dead ends: 334 [2020-08-22 00:34:00,171 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 00:34:00,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:34:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 00:34:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-22 00:34:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 00:34:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-22 00:34:00,186 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-22 00:34:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:00,186 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-22 00:34:00,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 00:34:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-22 00:34:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 00:34:00,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:00,188 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:00,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 00:34:00,188 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-22 00:34:00,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:00,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288139737] [2020-08-22 00:34:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:00,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:00,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:00,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:00,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 00:34:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:00,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 00:34:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:00,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 00:34:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:00,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288139737] [2020-08-22 00:34:00,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:00,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 00:34:00,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712699504] [2020-08-22 00:34:00,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 00:34:00,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 00:34:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 00:34:00,618 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-22 00:34:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:00,972 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-22 00:34:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 00:34:00,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-22 00:34:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:00,975 INFO L225 Difference]: With dead ends: 414 [2020-08-22 00:34:00,975 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 00:34:00,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:34:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 00:34:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-22 00:34:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 00:34:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-22 00:34:00,992 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-22 00:34:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:00,992 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-22 00:34:00,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 00:34:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-22 00:34:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 00:34:00,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:00,994 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:00,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 00:34:00,994 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:00,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:00,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-22 00:34:00,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:00,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023926885] [2020-08-22 00:34:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:01,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:01,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:01,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 00:34:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:01,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 00:34:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:01,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 00:34:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:01,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023926885] [2020-08-22 00:34:01,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:01,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 00:34:01,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313696766] [2020-08-22 00:34:01,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 00:34:01,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:01,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 00:34:01,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:34:01,562 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-22 00:34:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:02,506 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-22 00:34:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 00:34:02,507 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-22 00:34:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:02,509 INFO L225 Difference]: With dead ends: 346 [2020-08-22 00:34:02,509 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 00:34:02,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-22 00:34:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 00:34:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-22 00:34:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 00:34:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-22 00:34:02,527 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-22 00:34:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:02,527 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-22 00:34:02,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 00:34:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-22 00:34:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 00:34:02,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:02,529 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:02,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 00:34:02,529 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:02,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-22 00:34:02,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:02,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763919168] [2020-08-22 00:34:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:02,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:02,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:02,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 00:34:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:02,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 00:34:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:02,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 00:34:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:02,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763919168] [2020-08-22 00:34:02,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:02,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 00:34:02,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691148479] [2020-08-22 00:34:02,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 00:34:02,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:02,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 00:34:02,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:34:02,996 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-22 00:34:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:03,307 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-22 00:34:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 00:34:03,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-22 00:34:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:03,310 INFO L225 Difference]: With dead ends: 431 [2020-08-22 00:34:03,310 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 00:34:03,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 00:34:03,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 00:34:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-22 00:34:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-22 00:34:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-22 00:34:03,326 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-22 00:34:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:03,327 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-22 00:34:03,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 00:34:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-22 00:34:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 00:34:03,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:03,328 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:03,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 00:34:03,329 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-22 00:34:03,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:03,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425163161] [2020-08-22 00:34:03,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:03,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:03,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:03,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:03,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 00:34:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:03,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 00:34:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:03,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 00:34:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:03,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425163161] [2020-08-22 00:34:03,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:03,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 00:34:03,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003089956] [2020-08-22 00:34:03,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 00:34:03,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:03,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 00:34:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 00:34:03,936 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-22 00:34:05,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:05,033 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-22 00:34:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 00:34:05,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-22 00:34:05,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:05,037 INFO L225 Difference]: With dead ends: 358 [2020-08-22 00:34:05,037 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 00:34:05,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 00:34:05,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 00:34:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-22 00:34:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 00:34:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-22 00:34:05,072 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-22 00:34:05,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:05,073 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-22 00:34:05,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 00:34:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-22 00:34:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 00:34:05,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:05,075 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:05,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 00:34:05,076 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:05,076 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-22 00:34:05,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:05,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562355707] [2020-08-22 00:34:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:05,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:05,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:05,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:05,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 00:34:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:05,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 00:34:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:05,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:05,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562355707] [2020-08-22 00:34:05,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:05,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 00:34:05,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461704980] [2020-08-22 00:34:05,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 00:34:05,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:05,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 00:34:05,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 00:34:05,689 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-22 00:34:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:06,047 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-22 00:34:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 00:34:06,048 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-22 00:34:06,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:06,050 INFO L225 Difference]: With dead ends: 448 [2020-08-22 00:34:06,050 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 00:34:06,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 00:34:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 00:34:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-22 00:34:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 00:34:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-22 00:34:06,071 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-22 00:34:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:06,071 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-22 00:34:06,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 00:34:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-22 00:34:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 00:34:06,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:06,073 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:06,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 00:34:06,073 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-22 00:34:06,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:06,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609104875] [2020-08-22 00:34:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:06,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:06,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:06,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:06,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 00:34:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:06,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 00:34:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:06,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 00:34:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:06,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609104875] [2020-08-22 00:34:06,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:06,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 00:34:06,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032008995] [2020-08-22 00:34:06,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 00:34:06,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 00:34:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 00:34:06,813 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-22 00:34:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:07,895 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-22 00:34:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 00:34:07,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-22 00:34:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:07,898 INFO L225 Difference]: With dead ends: 370 [2020-08-22 00:34:07,898 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 00:34:07,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 00:34:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 00:34:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-22 00:34:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 00:34:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-22 00:34:07,917 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-22 00:34:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:07,917 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-22 00:34:07,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 00:34:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-22 00:34:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 00:34:07,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:07,919 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:07,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 00:34:07,919 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-22 00:34:07,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:07,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256949701] [2020-08-22 00:34:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:07,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:07,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:07,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:08,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 00:34:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:08,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 00:34:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:08,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 00:34:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:08,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256949701] [2020-08-22 00:34:08,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:08,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 00:34:08,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276863041] [2020-08-22 00:34:08,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 00:34:08,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:08,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 00:34:08,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 00:34:08,467 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-22 00:34:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:08,931 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-22 00:34:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 00:34:08,938 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-22 00:34:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:08,941 INFO L225 Difference]: With dead ends: 465 [2020-08-22 00:34:08,941 INFO L226 Difference]: Without dead ends: 348 [2020-08-22 00:34:08,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 00:34:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-22 00:34:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-22 00:34:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-22 00:34:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-22 00:34:08,966 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-22 00:34:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:08,966 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-22 00:34:08,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 00:34:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-22 00:34:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 00:34:08,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:08,969 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:08,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 00:34:08,969 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-22 00:34:08,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:08,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489234799] [2020-08-22 00:34:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:09,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:09,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:09,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:09,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 00:34:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:09,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 00:34:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:09,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 00:34:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:09,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489234799] [2020-08-22 00:34:09,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:09,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 00:34:09,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586925265] [2020-08-22 00:34:09,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 00:34:09,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 00:34:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 00:34:09,763 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-22 00:34:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:11,171 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-22 00:34:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 00:34:11,172 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-22 00:34:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:11,174 INFO L225 Difference]: With dead ends: 382 [2020-08-22 00:34:11,175 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 00:34:11,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 00:34:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 00:34:11,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-22 00:34:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 00:34:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-22 00:34:11,195 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-22 00:34:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:11,196 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-22 00:34:11,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 00:34:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-22 00:34:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 00:34:11,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:11,198 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:11,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 00:34:11,198 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:11,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:11,199 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-22 00:34:11,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:11,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640389084] [2020-08-22 00:34:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:11,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:11,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:11,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:11,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 00:34:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 00:34:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:11,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 00:34:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:11,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640389084] [2020-08-22 00:34:11,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:11,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 00:34:11,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427969602] [2020-08-22 00:34:11,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 00:34:11,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:11,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 00:34:11,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 00:34:11,731 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-22 00:34:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:12,342 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-22 00:34:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 00:34:12,343 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-22 00:34:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:12,347 INFO L225 Difference]: With dead ends: 482 [2020-08-22 00:34:12,347 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 00:34:12,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 00:34:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 00:34:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-22 00:34:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 00:34:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-22 00:34:12,382 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-22 00:34:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:12,382 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-22 00:34:12,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 00:34:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-22 00:34:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 00:34:12,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:12,385 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:12,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 00:34:12,386 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:12,386 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-22 00:34:12,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:12,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197975380] [2020-08-22 00:34:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:12,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:12,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:12,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:13,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 00:34:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 00:34:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:13,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 00:34:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:13,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197975380] [2020-08-22 00:34:13,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:13,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 00:34:13,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218674468] [2020-08-22 00:34:13,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 00:34:13,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:13,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 00:34:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 00:34:13,255 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-22 00:34:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:14,781 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-22 00:34:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 00:34:14,788 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-22 00:34:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:14,790 INFO L225 Difference]: With dead ends: 394 [2020-08-22 00:34:14,790 INFO L226 Difference]: Without dead ends: 277 [2020-08-22 00:34:14,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-22 00:34:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-22 00:34:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-22 00:34:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 00:34:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-22 00:34:14,810 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-22 00:34:14,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:14,810 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-22 00:34:14,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 00:34:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-22 00:34:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 00:34:14,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:14,812 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:14,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 00:34:14,812 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-22 00:34:14,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:14,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875906133] [2020-08-22 00:34:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:14,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:14,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:14,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:15,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 00:34:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:15,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 00:34:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:15,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 00:34:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:15,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875906133] [2020-08-22 00:34:15,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:15,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 00:34:15,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917361126] [2020-08-22 00:34:15,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 00:34:15,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:15,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 00:34:15,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 00:34:15,432 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-22 00:34:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:15,843 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-22 00:34:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 00:34:15,843 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-22 00:34:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:15,846 INFO L225 Difference]: With dead ends: 499 [2020-08-22 00:34:15,846 INFO L226 Difference]: Without dead ends: 376 [2020-08-22 00:34:15,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 00:34:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-22 00:34:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-22 00:34:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-22 00:34:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-22 00:34:15,866 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-22 00:34:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:15,867 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-22 00:34:15,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 00:34:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-22 00:34:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 00:34:15,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:15,868 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:15,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 00:34:15,868 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:15,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:15,869 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-22 00:34:15,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:15,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572680074] [2020-08-22 00:34:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:15,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:15,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:15,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:16,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 00:34:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 00:34:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:16,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 00:34:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:16,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572680074] [2020-08-22 00:34:16,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:16,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 00:34:16,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747485298] [2020-08-22 00:34:16,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 00:34:16,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:16,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 00:34:16,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 00:34:16,739 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-22 00:34:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:18,357 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-22 00:34:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 00:34:18,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-22 00:34:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:18,360 INFO L225 Difference]: With dead ends: 406 [2020-08-22 00:34:18,361 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 00:34:18,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 00:34:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 00:34:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-22 00:34:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 00:34:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-22 00:34:18,380 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-22 00:34:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:18,381 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-22 00:34:18,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 00:34:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-22 00:34:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 00:34:18,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:18,382 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:18,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 00:34:18,382 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:18,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-22 00:34:18,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:18,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480205830] [2020-08-22 00:34:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:18,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:18,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:18,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:19,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 00:34:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:19,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 00:34:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:19,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 00:34:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:19,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480205830] [2020-08-22 00:34:19,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:19,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 00:34:19,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76547576] [2020-08-22 00:34:19,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 00:34:19,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 00:34:19,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 00:34:19,060 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-22 00:34:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:19,428 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-22 00:34:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 00:34:19,428 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-22 00:34:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:19,431 INFO L225 Difference]: With dead ends: 516 [2020-08-22 00:34:19,431 INFO L226 Difference]: Without dead ends: 390 [2020-08-22 00:34:19,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 00:34:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-22 00:34:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-22 00:34:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 00:34:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-22 00:34:19,454 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-22 00:34:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:19,454 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-22 00:34:19,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 00:34:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-22 00:34:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 00:34:19,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:19,457 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:19,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 00:34:19,457 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:19,458 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-22 00:34:19,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:19,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170546030] [2020-08-22 00:34:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:19,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:19,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:19,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:20,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 00:34:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:20,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 00:34:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:20,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 00:34:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:20,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170546030] [2020-08-22 00:34:20,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:20,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 00:34:20,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097441368] [2020-08-22 00:34:20,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 00:34:20,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 00:34:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 00:34:20,388 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-22 00:34:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:22,164 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-22 00:34:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 00:34:22,165 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-22 00:34:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:22,166 INFO L225 Difference]: With dead ends: 418 [2020-08-22 00:34:22,166 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 00:34:22,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-22 00:34:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 00:34:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-22 00:34:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-22 00:34:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-22 00:34:22,187 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-22 00:34:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:22,187 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-22 00:34:22,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 00:34:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-22 00:34:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 00:34:22,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:22,189 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:22,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 00:34:22,189 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-22 00:34:22,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:22,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191996568] [2020-08-22 00:34:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:22,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:22,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:22,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:22,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 00:34:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:22,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 00:34:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:22,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 00:34:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 00:34:22,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191996568] [2020-08-22 00:34:22,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:22,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 00:34:22,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253359278] [2020-08-22 00:34:22,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 00:34:22,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:22,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 00:34:22,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 00:34:22,918 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-22 00:34:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:23,461 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-22 00:34:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 00:34:23,462 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-22 00:34:23,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:23,465 INFO L225 Difference]: With dead ends: 533 [2020-08-22 00:34:23,465 INFO L226 Difference]: Without dead ends: 404 [2020-08-22 00:34:23,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 00:34:23,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-22 00:34:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-22 00:34:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 00:34:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-22 00:34:23,488 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-22 00:34:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:23,488 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-22 00:34:23,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 00:34:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-22 00:34:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 00:34:23,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:23,490 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:23,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 00:34:23,490 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-22 00:34:23,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:23,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659593167] [2020-08-22 00:34:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:23,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:23,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:23,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:23,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:23,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:34:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:23,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 00:34:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 00:34:23,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659593167] [2020-08-22 00:34:23,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:34:23,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 00:34:23,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700336038] [2020-08-22 00:34:23,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:34:23,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:34:23,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:34:23,738 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-22 00:34:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:24,146 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-22 00:34:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:34:24,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 00:34:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:24,150 INFO L225 Difference]: With dead ends: 271 [2020-08-22 00:34:24,150 INFO L226 Difference]: Without dead ends: 261 [2020-08-22 00:34:24,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:34:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-22 00:34:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-22 00:34:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-22 00:34:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-22 00:34:24,174 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-22 00:34:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:24,174 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-22 00:34:24,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:34:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-22 00:34:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 00:34:24,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:24,176 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:24,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 00:34:24,176 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-22 00:34:24,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:24,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311208028] [2020-08-22 00:34:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:34:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 00:34:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 00:34:24,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311208028] [2020-08-22 00:34:24,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:24,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:34:24,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112251897] [2020-08-22 00:34:24,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:34:24,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:34:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:34:24,488 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-22 00:34:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:24,806 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-22 00:34:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:34:24,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 00:34:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:24,812 INFO L225 Difference]: With dead ends: 285 [2020-08-22 00:34:24,812 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 00:34:24,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:34:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 00:34:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-22 00:34:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 00:34:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-22 00:34:24,855 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-22 00:34:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:24,855 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-22 00:34:24,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:34:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-22 00:34:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 00:34:24,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:24,858 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:24,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 00:34:24,858 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-22 00:34:24,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:24,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578711795] [2020-08-22 00:34:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:34:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 00:34:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-22 00:34:24,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578711795] [2020-08-22 00:34:24,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:34:24,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 00:34:24,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406270359] [2020-08-22 00:34:24,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:34:24,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:24,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:34:24,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:34:24,987 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-22 00:34:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:25,056 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-22 00:34:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 00:34:25,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-22 00:34:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:25,059 INFO L225 Difference]: With dead ends: 271 [2020-08-22 00:34:25,059 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 00:34:25,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:34:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 00:34:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-22 00:34:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 00:34:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-22 00:34:25,098 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-22 00:34:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:25,098 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-22 00:34:25,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:34:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-22 00:34:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 00:34:25,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:25,101 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:25,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 00:34:25,101 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:25,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-22 00:34:25,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:25,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541788379] [2020-08-22 00:34:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:34:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 00:34:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 00:34:25,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541788379] [2020-08-22 00:34:25,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:25,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 00:34:25,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997226313] [2020-08-22 00:34:25,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 00:34:25,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:25,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 00:34:25,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:34:25,478 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-22 00:34:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:25,722 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-22 00:34:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:34:25,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-22 00:34:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:25,724 INFO L225 Difference]: With dead ends: 284 [2020-08-22 00:34:25,724 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 00:34:25,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-22 00:34:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 00:34:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-22 00:34:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-22 00:34:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-22 00:34:25,757 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-22 00:34:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:25,758 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-22 00:34:25,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 00:34:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-22 00:34:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 00:34:25,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:25,760 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:25,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 00:34:25,760 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-22 00:34:25,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:25,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854313907] [2020-08-22 00:34:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:34:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 00:34:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 00:34:25,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854313907] [2020-08-22 00:34:25,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:34:25,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 00:34:25,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657455042] [2020-08-22 00:34:25,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:34:25,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:34:25,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:34:25,942 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-22 00:34:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:26,118 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-22 00:34:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:34:26,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-22 00:34:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:26,121 INFO L225 Difference]: With dead ends: 303 [2020-08-22 00:34:26,121 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 00:34:26,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:34:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 00:34:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-22 00:34:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 00:34:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-22 00:34:26,163 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-22 00:34:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:26,164 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-22 00:34:26,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:34:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-22 00:34:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 00:34:26,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:26,166 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:26,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 00:34:26,166 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:26,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-22 00:34:26,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:26,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536091821] [2020-08-22 00:34:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 00:34:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 00:34:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 00:34:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 00:34:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 00:34:26,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536091821] [2020-08-22 00:34:26,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:26,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 00:34:26,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871191473] [2020-08-22 00:34:26,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:34:26,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:26,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:34:26,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:34:26,284 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-22 00:34:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:26,389 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-22 00:34:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:34:26,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-22 00:34:26,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:26,391 INFO L225 Difference]: With dead ends: 409 [2020-08-22 00:34:26,391 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 00:34:26,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:34:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 00:34:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-22 00:34:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 00:34:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 00:34:26,413 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-22 00:34:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:26,413 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 00:34:26,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:34:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 00:34:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 00:34:26,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:26,415 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:26,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 00:34:26,415 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:26,415 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-22 00:34:26,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:26,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935739190] [2020-08-22 00:34:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:34:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 00:34:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-22 00:34:26,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935739190] [2020-08-22 00:34:26,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:34:26,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 00:34:26,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861764420] [2020-08-22 00:34:26,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:34:26,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:34:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:34:26,605 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-22 00:34:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:26,746 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-22 00:34:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:34:26,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-22 00:34:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:26,748 INFO L225 Difference]: With dead ends: 158 [2020-08-22 00:34:26,749 INFO L226 Difference]: Without dead ends: 143 [2020-08-22 00:34:26,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:34:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-22 00:34:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-22 00:34:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 00:34:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 00:34:26,769 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-22 00:34:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:26,770 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 00:34:26,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:34:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 00:34:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 00:34:26,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:26,771 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:26,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 00:34:26,771 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-22 00:34:26,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:26,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272053310] [2020-08-22 00:34:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:34:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 00:34:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-22 00:34:26,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272053310] [2020-08-22 00:34:26,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:26,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:34:26,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190190925] [2020-08-22 00:34:26,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:34:26,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:26,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:34:26,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:34:26,941 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-22 00:34:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:27,075 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 00:34:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:34:27,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 00:34:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:27,077 INFO L225 Difference]: With dead ends: 176 [2020-08-22 00:34:27,077 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 00:34:27,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:34:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 00:34:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-22 00:34:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 00:34:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-22 00:34:27,114 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-22 00:34:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:27,115 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-22 00:34:27,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:34:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-22 00:34:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 00:34:27,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:27,116 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:27,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 00:34:27,117 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-22 00:34:27,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:27,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703493483] [2020-08-22 00:34:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:34:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 00:34:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-22 00:34:27,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703493483] [2020-08-22 00:34:27,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:27,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:34:27,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166946676] [2020-08-22 00:34:27,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:34:27,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:27,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:34:27,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:34:27,342 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-22 00:34:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:27,553 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-22 00:34:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:34:27,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 00:34:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:27,556 INFO L225 Difference]: With dead ends: 170 [2020-08-22 00:34:27,556 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 00:34:27,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:34:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 00:34:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-22 00:34:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 00:34:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-22 00:34:27,578 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-22 00:34:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:27,578 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-22 00:34:27,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:34:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-22 00:34:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 00:34:27,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:27,580 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:27,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 00:34:27,580 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-22 00:34:27,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:27,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166425451] [2020-08-22 00:34:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 00:34:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:34:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 00:34:27,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166425451] [2020-08-22 00:34:27,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:27,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 00:34:27,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308635157] [2020-08-22 00:34:27,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:34:27,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:34:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:34:27,751 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-22 00:34:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:27,861 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-22 00:34:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 00:34:27,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-22 00:34:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:27,864 INFO L225 Difference]: With dead ends: 173 [2020-08-22 00:34:27,864 INFO L226 Difference]: Without dead ends: 163 [2020-08-22 00:34:27,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:34:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-22 00:34:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-22 00:34:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 00:34:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-22 00:34:27,892 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-22 00:34:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:27,892 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-22 00:34:27,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:34:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-22 00:34:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 00:34:27,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:34:27,894 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:34:27,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 00:34:27,895 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:34:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:34:27,895 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-22 00:34:27,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:34:27,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65584220] [2020-08-22 00:34:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:34:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:28,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:34:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:34:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:28,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:34:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:28,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 00:34:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:28,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 00:34:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:28,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:34:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:34:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 00:34:28,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65584220] [2020-08-22 00:34:28,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:34:28,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:34:28,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232780111] [2020-08-22 00:34:28,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:34:28,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:34:28,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:34:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:34:28,146 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-22 00:34:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:34:28,314 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-22 00:34:28,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:34:28,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-22 00:34:28,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:34:28,314 INFO L225 Difference]: With dead ends: 157 [2020-08-22 00:34:28,314 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 00:34:28,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:34:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 00:34:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 00:34:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 00:34:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 00:34:28,316 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-22 00:34:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:34:28,317 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 00:34:28,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:34:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 00:34:28,317 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 00:34:28,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 00:34:28,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.