/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:40:25,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:40:25,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:40:25,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:40:25,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:40:25,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:40:25,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:40:25,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:40:25,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:40:25,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:40:25,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:40:25,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:40:25,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:40:25,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:40:25,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:40:25,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:40:25,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:40:25,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:40:25,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:40:25,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:40:25,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:40:25,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:40:25,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:40:25,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:40:25,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:40:25,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:40:25,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:40:25,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:40:25,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:40:25,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:40:25,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:40:25,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:40:25,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:40:25,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:40:25,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:40:25,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:40:25,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:40:25,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:40:25,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:40:25,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:40:25,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:40:25,934 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 [2020-08-21 20:40:25,967 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:40:25,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:40:25,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:40:25,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:40:25,968 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:40:25,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:40:25,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:40:25,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:40:25,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:40:25,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:40:25,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:40:25,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:40:25,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:40:25,971 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:40:25,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:40:25,972 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:40:25,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:40:25,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:40:25,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:40:25,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:40:25,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:40:25,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:40:25,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:40:25,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:40:25,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:40:25,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:40:25,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:40:25,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:40:25,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:40:25,980 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=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:40:26,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:40:26,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:40:26,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:40:26,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:40:26,264 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:40:26,264 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-21 20:40:26,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5fc9cb0f/055f5f6659a64d1ba45810c634cd808a/FLAGf85fc2a73 [2020-08-21 20:40:26,746 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:40:26,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-21 20:40:26,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5fc9cb0f/055f5f6659a64d1ba45810c634cd808a/FLAGf85fc2a73 [2020-08-21 20:40:27,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5fc9cb0f/055f5f6659a64d1ba45810c634cd808a [2020-08-21 20:40:27,120 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:40:27,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:40:27,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:40:27,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:40:27,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:40:27,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5adf6174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27, skipping insertion in model container [2020-08-21 20:40:27,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:40:27,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:40:27,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:40:27,343 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:40:27,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:40:27,379 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:40:27,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27 WrapperNode [2020-08-21 20:40:27,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:40:27,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:40:27,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:40:27,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:40:27,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (1/1) ... [2020-08-21 20:40:27,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:40:27,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:40:27,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:40:27,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:40:27,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (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 [2020-08-21 20:40:27,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:40:27,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:40:27,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 20:40:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-21 20:40:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:40:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:40:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 20:40:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:40:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-08-21 20:40:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 20:40:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:40:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:40:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:40:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:40:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:40:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:40:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:40:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:40:27,852 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:40:27,852 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 20:40:27,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:40:27 BoogieIcfgContainer [2020-08-21 20:40:27,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:40:27,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:40:27,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:40:27,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:40:27,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:40:27" (1/3) ... [2020-08-21 20:40:27,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e85871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:40:27, skipping insertion in model container [2020-08-21 20:40:27,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:27" (2/3) ... [2020-08-21 20:40:27,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e85871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:40:27, skipping insertion in model container [2020-08-21 20:40:27,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:40:27" (3/3) ... [2020-08-21 20:40:27,867 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-08-21 20:40:27,883 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:40:27,891 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:40:27,905 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:40:27,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:40:27,933 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:40:27,933 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:40:27,933 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:40:27,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:40:27,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:40:27,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:40:27,934 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:40:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 20:40:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:40:27,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:27,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:27,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:27,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-08-21 20:40:27,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:27,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593867557] [2020-08-21 20:40:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:28,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:28,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:28,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593867557] [2020-08-21 20:40:28,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:40:28,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 20:40:28,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806377777] [2020-08-21 20:40:28,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 20:40:28,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 20:40:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:40:28,263 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-08-21 20:40:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:28,431 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-08-21 20:40:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:40:28,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-21 20:40:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:28,456 INFO L225 Difference]: With dead ends: 59 [2020-08-21 20:40:28,457 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 20:40:28,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:40:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 20:40:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-21 20:40:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 20:40:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-21 20:40:28,503 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-08-21 20:40:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:28,503 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-21 20:40:28,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 20:40:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-21 20:40:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:40:28,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:28,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:28,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:40:28,506 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-08-21 20:40:28,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:28,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688462735] [2020-08-21 20:40:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:28,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:28,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:28,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688462735] [2020-08-21 20:40:28,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:40:28,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:40:28,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461347472] [2020-08-21 20:40:28,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:40:28,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:40:28,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:40:28,726 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-21 20:40:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:28,920 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 20:40:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 20:40:28,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 20:40:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:28,922 INFO L225 Difference]: With dead ends: 48 [2020-08-21 20:40:28,923 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 20:40:28,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:40:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 20:40:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-21 20:40:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 20:40:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-21 20:40:28,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-21 20:40:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:28,946 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-21 20:40:28,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:40:28,946 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-21 20:40:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:40:28,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:28,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:28,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:40:28,948 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-08-21 20:40:28,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:28,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521997336] [2020-08-21 20:40:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:28,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:29,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:29,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521997336] [2020-08-21 20:40:29,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:29,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 20:40:29,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211252701] [2020-08-21 20:40:29,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:40:29,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:29,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:40:29,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:40:29,122 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-21 20:40:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:29,272 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-21 20:40:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 20:40:29,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 20:40:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:29,274 INFO L225 Difference]: With dead ends: 50 [2020-08-21 20:40:29,274 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 20:40:29,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:40:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 20:40:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-21 20:40:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 20:40:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-21 20:40:29,282 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-21 20:40:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:29,283 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-21 20:40:29,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:40:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-21 20:40:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 20:40:29,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:29,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:29,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:40:29,285 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2059999690, now seen corresponding path program 2 times [2020-08-21 20:40:29,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:29,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783059726] [2020-08-21 20:40:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:29,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:29,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783059726] [2020-08-21 20:40:29,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:29,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 20:40:29,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211650287] [2020-08-21 20:40:29,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:40:29,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:29,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:40:29,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:40:29,493 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-21 20:40:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:29,654 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-08-21 20:40:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:40:29,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-21 20:40:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:29,656 INFO L225 Difference]: With dead ends: 52 [2020-08-21 20:40:29,656 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 20:40:29,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:40:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 20:40:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-21 20:40:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 20:40:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-21 20:40:29,663 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-21 20:40:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:29,663 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-21 20:40:29,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:40:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-21 20:40:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 20:40:29,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:29,665 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:29,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:40:29,665 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1428164148, now seen corresponding path program 3 times [2020-08-21 20:40:29,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:29,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312555345] [2020-08-21 20:40:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:29,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:29,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:29,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312555345] [2020-08-21 20:40:29,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:29,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 20:40:29,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674499794] [2020-08-21 20:40:29,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:40:29,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:40:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:40:29,883 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-21 20:40:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:30,049 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-08-21 20:40:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:40:30,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 20:40:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:30,051 INFO L225 Difference]: With dead ends: 54 [2020-08-21 20:40:30,051 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 20:40:30,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:40:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 20:40:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-21 20:40:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-21 20:40:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-21 20:40:30,057 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-21 20:40:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:30,058 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-21 20:40:30,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:40:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-21 20:40:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 20:40:30,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:30,059 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:30,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:40:30,059 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 815845710, now seen corresponding path program 4 times [2020-08-21 20:40:30,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:30,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604546862] [2020-08-21 20:40:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:30,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604546862] [2020-08-21 20:40:30,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:30,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:40:30,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43432120] [2020-08-21 20:40:30,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:40:30,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:30,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:40:30,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:40:30,328 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-21 20:40:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:30,494 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-21 20:40:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:40:30,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-21 20:40:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:30,495 INFO L225 Difference]: With dead ends: 56 [2020-08-21 20:40:30,496 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 20:40:30,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:40:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 20:40:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-21 20:40:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 20:40:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-21 20:40:30,502 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-21 20:40:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:30,502 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-21 20:40:30,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 20:40:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-21 20:40:30,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 20:40:30,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:30,504 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:30,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:40:30,504 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1235736656, now seen corresponding path program 5 times [2020-08-21 20:40:30,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:30,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101349446] [2020-08-21 20:40:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:30,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101349446] [2020-08-21 20:40:30,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:30,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 20:40:30,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247642292] [2020-08-21 20:40:30,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:40:30,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:40:30,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:40:30,784 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-21 20:40:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:30,958 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-21 20:40:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 20:40:30,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 20:40:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:30,959 INFO L225 Difference]: With dead ends: 58 [2020-08-21 20:40:30,960 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 20:40:30,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-08-21 20:40:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 20:40:30,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-21 20:40:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 20:40:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-21 20:40:30,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-21 20:40:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:30,966 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-21 20:40:30,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:40:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-21 20:40:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 20:40:30,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:30,967 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:30,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:40:30,968 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:30,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1024009938, now seen corresponding path program 6 times [2020-08-21 20:40:30,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:30,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479995136] [2020-08-21 20:40:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:31,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479995136] [2020-08-21 20:40:31,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:31,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:40:31,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326345582] [2020-08-21 20:40:31,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:40:31,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:31,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:40:31,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:40:31,283 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-21 20:40:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:31,499 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-21 20:40:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:40:31,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-21 20:40:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:31,501 INFO L225 Difference]: With dead ends: 60 [2020-08-21 20:40:31,501 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 20:40:31,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:40:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 20:40:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-21 20:40:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 20:40:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-21 20:40:31,507 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-21 20:40:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:31,507 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-21 20:40:31,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:40:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-21 20:40:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 20:40:31,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:31,509 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:31,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:40:31,509 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash -581903148, now seen corresponding path program 7 times [2020-08-21 20:40:31,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:31,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740645415] [2020-08-21 20:40:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:31,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:31,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:31,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740645415] [2020-08-21 20:40:31,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:31,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 20:40:31,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046800869] [2020-08-21 20:40:31,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 20:40:31,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 20:40:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:40:31,830 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-08-21 20:40:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:32,008 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-21 20:40:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 20:40:32,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-08-21 20:40:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:32,009 INFO L225 Difference]: With dead ends: 62 [2020-08-21 20:40:32,009 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 20:40:32,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-08-21 20:40:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 20:40:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-21 20:40:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 20:40:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-21 20:40:32,019 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-08-21 20:40:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:32,019 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-21 20:40:32,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 20:40:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-21 20:40:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 20:40:32,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:32,024 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:32,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:40:32,024 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1971119530, now seen corresponding path program 8 times [2020-08-21 20:40:32,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:32,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982849380] [2020-08-21 20:40:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:40:32,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982849380] [2020-08-21 20:40:32,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:32,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 20:40:32,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751135217] [2020-08-21 20:40:32,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 20:40:32,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:32,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 20:40:32,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-08-21 20:40:32,474 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-08-21 20:40:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:32,709 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-21 20:40:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 20:40:32,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-21 20:40:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:32,711 INFO L225 Difference]: With dead ends: 64 [2020-08-21 20:40:32,711 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 20:40:32,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-08-21 20:40:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 20:40:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-21 20:40:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 20:40:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-21 20:40:32,717 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-08-21 20:40:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:32,717 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-21 20:40:32,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 20:40:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-21 20:40:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 20:40:32,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:32,718 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:32,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:40:32,719 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1273233576, now seen corresponding path program 9 times [2020-08-21 20:40:32,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:32,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079121424] [2020-08-21 20:40:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-21 20:40:32,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079121424] [2020-08-21 20:40:32,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:40:32,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:40:32,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596751720] [2020-08-21 20:40:32,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:40:32,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:32,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:40:32,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:40:32,781 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-08-21 20:40:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:32,851 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-08-21 20:40:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 20:40:32,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-21 20:40:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:32,855 INFO L225 Difference]: With dead ends: 65 [2020-08-21 20:40:32,855 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 20:40:32,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:40:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 20:40:32,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-08-21 20:40:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 20:40:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-21 20:40:32,873 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-08-21 20:40:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:32,874 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-21 20:40:32,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:40:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-21 20:40:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 20:40:32,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:32,875 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:32,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 20:40:32,875 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:32,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1053921041, now seen corresponding path program 1 times [2020-08-21 20:40:32,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:32,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917852588] [2020-08-21 20:40:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-21 20:40:32,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917852588] [2020-08-21 20:40:32,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:32,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 20:40:32,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187141052] [2020-08-21 20:40:32,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:40:32,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:32,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:40:32,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:40:32,951 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-21 20:40:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:33,041 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-08-21 20:40:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:40:33,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-21 20:40:33,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:33,043 INFO L225 Difference]: With dead ends: 73 [2020-08-21 20:40:33,043 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 20:40:33,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:40:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 20:40:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-08-21 20:40:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 20:40:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-08-21 20:40:33,049 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 41 [2020-08-21 20:40:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:33,050 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-08-21 20:40:33,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:40:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-08-21 20:40:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 20:40:33,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:33,051 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:33,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 20:40:33,051 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash -159448072, now seen corresponding path program 2 times [2020-08-21 20:40:33,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:33,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257974661] [2020-08-21 20:40:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:33,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:33,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-21 20:40:33,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257974661] [2020-08-21 20:40:33,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:40:33,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:40:33,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129354982] [2020-08-21 20:40:33,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:40:33,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:33,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:40:33,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:40:33,140 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-08-21 20:40:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:33,206 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-08-21 20:40:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 20:40:33,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-21 20:40:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:33,207 INFO L225 Difference]: With dead ends: 69 [2020-08-21 20:40:33,207 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 20:40:33,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:40:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 20:40:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-21 20:40:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 20:40:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-08-21 20:40:33,219 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-08-21 20:40:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:33,219 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-08-21 20:40:33,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:40:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-08-21 20:40:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 20:40:33,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:33,220 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:33,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 20:40:33,221 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1139281096, now seen corresponding path program 1 times [2020-08-21 20:40:33,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:33,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868806166] [2020-08-21 20:40:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:33,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:33,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:33,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868806166] [2020-08-21 20:40:33,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:33,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 20:40:33,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183622360] [2020-08-21 20:40:33,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 20:40:33,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 20:40:33,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:40:33,739 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2020-08-21 20:40:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:33,939 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-08-21 20:40:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 20:40:33,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-08-21 20:40:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:33,941 INFO L225 Difference]: With dead ends: 74 [2020-08-21 20:40:33,941 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 20:40:33,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-08-21 20:40:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 20:40:33,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-21 20:40:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 20:40:33,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-21 20:40:33,947 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-08-21 20:40:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:33,948 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-21 20:40:33,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 20:40:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-21 20:40:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 20:40:33,949 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:33,949 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:33,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 20:40:33,949 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash 763672122, now seen corresponding path program 2 times [2020-08-21 20:40:33,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:33,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628286784] [2020-08-21 20:40:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:33,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:34,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:34,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628286784] [2020-08-21 20:40:34,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:34,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 20:40:34,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085901241] [2020-08-21 20:40:34,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 20:40:34,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:34,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 20:40:34,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-08-21 20:40:34,435 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-08-21 20:40:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:34,664 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-08-21 20:40:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 20:40:34,665 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-21 20:40:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:34,665 INFO L225 Difference]: With dead ends: 76 [2020-08-21 20:40:34,666 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 20:40:34,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-08-21 20:40:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 20:40:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-21 20:40:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-21 20:40:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-08-21 20:40:34,675 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-08-21 20:40:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:34,676 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-08-21 20:40:34,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 20:40:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-08-21 20:40:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 20:40:34,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:34,678 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:34,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 20:40:34,678 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:34,678 INFO L82 PathProgramCache]: Analyzing trace with hash -154353476, now seen corresponding path program 3 times [2020-08-21 20:40:34,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:34,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173671472] [2020-08-21 20:40:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:34,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:34,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:35,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173671472] [2020-08-21 20:40:35,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:35,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 20:40:35,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059803046] [2020-08-21 20:40:35,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 20:40:35,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 20:40:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-08-21 20:40:35,145 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-08-21 20:40:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:35,379 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-08-21 20:40:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 20:40:35,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-08-21 20:40:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:35,381 INFO L225 Difference]: With dead ends: 78 [2020-08-21 20:40:35,382 INFO L226 Difference]: Without dead ends: 56 [2020-08-21 20:40:35,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-08-21 20:40:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-21 20:40:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-21 20:40:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 20:40:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-21 20:40:35,398 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-08-21 20:40:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:35,398 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-21 20:40:35,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 20:40:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-21 20:40:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 20:40:35,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:35,404 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:35,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 20:40:35,404 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:35,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:35,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1908657474, now seen corresponding path program 4 times [2020-08-21 20:40:35,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:35,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158114276] [2020-08-21 20:40:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:35,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:35,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:35,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158114276] [2020-08-21 20:40:35,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:35,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 20:40:35,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835232942] [2020-08-21 20:40:35,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 20:40:35,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:35,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 20:40:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-08-21 20:40:35,993 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-08-21 20:40:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:36,238 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-21 20:40:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 20:40:36,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-21 20:40:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:36,240 INFO L225 Difference]: With dead ends: 80 [2020-08-21 20:40:36,240 INFO L226 Difference]: Without dead ends: 58 [2020-08-21 20:40:36,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-08-21 20:40:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-21 20:40:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-21 20:40:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 20:40:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-21 20:40:36,250 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-08-21 20:40:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:36,251 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-21 20:40:36,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 20:40:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-21 20:40:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 20:40:36,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:36,252 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:36,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 20:40:36,253 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:36,253 INFO L82 PathProgramCache]: Analyzing trace with hash 127347776, now seen corresponding path program 5 times [2020-08-21 20:40:36,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:36,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811226960] [2020-08-21 20:40:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:36,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:36,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:36,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811226960] [2020-08-21 20:40:36,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:36,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 20:40:36,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41152674] [2020-08-21 20:40:36,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 20:40:36,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:36,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 20:40:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-08-21 20:40:36,897 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 19 states. [2020-08-21 20:40:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:37,130 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-08-21 20:40:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 20:40:37,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-08-21 20:40:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:37,131 INFO L225 Difference]: With dead ends: 82 [2020-08-21 20:40:37,132 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 20:40:37,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2020-08-21 20:40:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 20:40:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-21 20:40:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 20:40:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-21 20:40:37,137 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-08-21 20:40:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:37,137 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-21 20:40:37,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 20:40:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-21 20:40:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 20:40:37,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:37,138 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:37,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 20:40:37,139 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:37,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1776693950, now seen corresponding path program 6 times [2020-08-21 20:40:37,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:37,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713052882] [2020-08-21 20:40:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:37,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:37,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:37,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713052882] [2020-08-21 20:40:37,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:37,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 20:40:37,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107861955] [2020-08-21 20:40:37,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 20:40:37,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 20:40:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-08-21 20:40:37,958 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-08-21 20:40:38,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:38,318 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-08-21 20:40:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 20:40:38,319 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-08-21 20:40:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:38,320 INFO L225 Difference]: With dead ends: 84 [2020-08-21 20:40:38,320 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 20:40:38,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-08-21 20:40:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 20:40:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-21 20:40:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 20:40:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-08-21 20:40:38,325 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-08-21 20:40:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:38,326 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-08-21 20:40:38,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 20:40:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-08-21 20:40:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 20:40:38,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:38,329 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:38,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 20:40:38,329 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:38,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1904724540, now seen corresponding path program 7 times [2020-08-21 20:40:38,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:38,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879505334] [2020-08-21 20:40:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:38,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:38,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:39,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879505334] [2020-08-21 20:40:39,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:39,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 20:40:39,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143283878] [2020-08-21 20:40:39,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 20:40:39,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 20:40:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-21 20:40:39,060 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 21 states. [2020-08-21 20:40:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:39,262 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-08-21 20:40:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 20:40:39,263 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-08-21 20:40:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:39,264 INFO L225 Difference]: With dead ends: 86 [2020-08-21 20:40:39,264 INFO L226 Difference]: Without dead ends: 64 [2020-08-21 20:40:39,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2020-08-21 20:40:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-21 20:40:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-21 20:40:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 20:40:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-08-21 20:40:39,270 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-08-21 20:40:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:39,271 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-08-21 20:40:39,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 20:40:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-08-21 20:40:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 20:40:39,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:39,272 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:39,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 20:40:39,272 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash -388069946, now seen corresponding path program 8 times [2020-08-21 20:40:39,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:39,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036277913] [2020-08-21 20:40:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:39,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:39,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:40,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036277913] [2020-08-21 20:40:40,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:40,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 20:40:40,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640157895] [2020-08-21 20:40:40,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 20:40:40,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:40,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 20:40:40,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-08-21 20:40:40,111 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-08-21 20:40:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:40,382 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-08-21 20:40:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 20:40:40,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-21 20:40:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:40,384 INFO L225 Difference]: With dead ends: 88 [2020-08-21 20:40:40,384 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 20:40:40,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-08-21 20:40:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 20:40:40,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-21 20:40:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 20:40:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-08-21 20:40:40,390 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-08-21 20:40:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:40,390 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-08-21 20:40:40,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 20:40:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-08-21 20:40:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 20:40:40,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:40,391 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:40,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 20:40:40,391 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1123081544, now seen corresponding path program 9 times [2020-08-21 20:40:40,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:40,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871991699] [2020-08-21 20:40:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:40,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:40,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:41,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871991699] [2020-08-21 20:40:41,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:41,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 20:40:41,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96013754] [2020-08-21 20:40:41,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 20:40:41,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:41,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 20:40:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-08-21 20:40:41,226 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2020-08-21 20:40:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:41,538 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-08-21 20:40:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 20:40:41,540 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-08-21 20:40:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:41,541 INFO L225 Difference]: With dead ends: 90 [2020-08-21 20:40:41,541 INFO L226 Difference]: Without dead ends: 68 [2020-08-21 20:40:41,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2020-08-21 20:40:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-21 20:40:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-21 20:40:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 20:40:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-08-21 20:40:41,547 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-08-21 20:40:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:41,547 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-08-21 20:40:41,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 20:40:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-08-21 20:40:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 20:40:41,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:41,549 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:41,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 20:40:41,549 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:41,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1640717386, now seen corresponding path program 10 times [2020-08-21 20:40:41,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:41,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001022152] [2020-08-21 20:40:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:41,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:41,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:42,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001022152] [2020-08-21 20:40:42,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:42,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 20:40:42,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272590772] [2020-08-21 20:40:42,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 20:40:42,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 20:40:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-08-21 20:40:42,572 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-08-21 20:40:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:42,854 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-08-21 20:40:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 20:40:42,854 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-08-21 20:40:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:42,856 INFO L225 Difference]: With dead ends: 92 [2020-08-21 20:40:42,856 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 20:40:42,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=436, Unknown=0, NotChecked=0, Total=702 [2020-08-21 20:40:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 20:40:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-21 20:40:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 20:40:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-08-21 20:40:42,861 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-08-21 20:40:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:42,862 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-08-21 20:40:42,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 20:40:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-08-21 20:40:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 20:40:42,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:42,863 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:42,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 20:40:42,863 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:42,864 INFO L82 PathProgramCache]: Analyzing trace with hash 872555212, now seen corresponding path program 11 times [2020-08-21 20:40:42,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:42,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114948295] [2020-08-21 20:40:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:42,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:42,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:43,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114948295] [2020-08-21 20:40:43,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:43,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 20:40:43,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510160590] [2020-08-21 20:40:43,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 20:40:43,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:43,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 20:40:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-08-21 20:40:43,746 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 25 states. [2020-08-21 20:40:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:44,060 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-08-21 20:40:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 20:40:44,060 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-08-21 20:40:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:44,061 INFO L225 Difference]: With dead ends: 94 [2020-08-21 20:40:44,061 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 20:40:44,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2020-08-21 20:40:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 20:40:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-21 20:40:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 20:40:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-08-21 20:40:44,068 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-08-21 20:40:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:44,068 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-08-21 20:40:44,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 20:40:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-08-21 20:40:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:40:44,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:44,069 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:44,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 20:40:44,070 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1403080910, now seen corresponding path program 12 times [2020-08-21 20:40:44,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:44,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539492361] [2020-08-21 20:40:44,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:44,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:44,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:45,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539492361] [2020-08-21 20:40:45,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:45,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 20:40:45,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221344367] [2020-08-21 20:40:45,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 20:40:45,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 20:40:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-21 20:40:45,067 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-08-21 20:40:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:45,399 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-08-21 20:40:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 20:40:45,400 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-08-21 20:40:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:45,401 INFO L225 Difference]: With dead ends: 96 [2020-08-21 20:40:45,401 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 20:40:45,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2020-08-21 20:40:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 20:40:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-21 20:40:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 20:40:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-08-21 20:40:45,406 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-08-21 20:40:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:45,406 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-08-21 20:40:45,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 20:40:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-08-21 20:40:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-21 20:40:45,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:45,407 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:45,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 20:40:45,407 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 137168464, now seen corresponding path program 13 times [2020-08-21 20:40:45,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:45,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002157774] [2020-08-21 20:40:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:45,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:46,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002157774] [2020-08-21 20:40:46,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:46,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 20:40:46,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448056463] [2020-08-21 20:40:46,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 20:40:46,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 20:40:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-08-21 20:40:46,449 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 27 states. [2020-08-21 20:40:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:46,672 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-08-21 20:40:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 20:40:46,672 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-08-21 20:40:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:46,673 INFO L225 Difference]: With dead ends: 98 [2020-08-21 20:40:46,673 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 20:40:46,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-08-21 20:40:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 20:40:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-21 20:40:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 20:40:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-08-21 20:40:46,678 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-08-21 20:40:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:46,678 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-08-21 20:40:46,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 20:40:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-08-21 20:40:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 20:40:46,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:46,679 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:46,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 20:40:46,679 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:46,680 INFO L82 PathProgramCache]: Analyzing trace with hash -928947374, now seen corresponding path program 14 times [2020-08-21 20:40:46,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:46,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253678307] [2020-08-21 20:40:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:46,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:46,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:47,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253678307] [2020-08-21 20:40:47,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:47,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 20:40:47,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417058845] [2020-08-21 20:40:47,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 20:40:47,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 20:40:47,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-08-21 20:40:47,770 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-08-21 20:40:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:48,060 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-08-21 20:40:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 20:40:48,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-08-21 20:40:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:48,062 INFO L225 Difference]: With dead ends: 100 [2020-08-21 20:40:48,062 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 20:40:48,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2020-08-21 20:40:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 20:40:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-21 20:40:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 20:40:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-08-21 20:40:48,068 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-08-21 20:40:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:48,069 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-08-21 20:40:48,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 20:40:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-08-21 20:40:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 20:40:48,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:48,070 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:48,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 20:40:48,070 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1030916052, now seen corresponding path program 15 times [2020-08-21 20:40:48,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:48,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876325316] [2020-08-21 20:40:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:48,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:48,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:49,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876325316] [2020-08-21 20:40:49,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:49,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 20:40:49,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294387824] [2020-08-21 20:40:49,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 20:40:49,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 20:40:49,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-08-21 20:40:49,266 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 29 states. [2020-08-21 20:40:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:49,627 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-08-21 20:40:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 20:40:49,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-08-21 20:40:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:49,628 INFO L225 Difference]: With dead ends: 102 [2020-08-21 20:40:49,629 INFO L226 Difference]: Without dead ends: 80 [2020-08-21 20:40:49,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-08-21 20:40:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-21 20:40:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-21 20:40:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 20:40:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-21 20:40:49,634 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-08-21 20:40:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:49,634 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-21 20:40:49,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 20:40:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-21 20:40:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 20:40:49,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:49,635 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:49,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 20:40:49,635 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1030974506, now seen corresponding path program 16 times [2020-08-21 20:40:49,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:49,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143481361] [2020-08-21 20:40:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:49,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:49,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:50,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143481361] [2020-08-21 20:40:50,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:50,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 20:40:50,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931327516] [2020-08-21 20:40:50,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 20:40:50,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 20:40:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-08-21 20:40:50,901 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-08-21 20:40:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:51,171 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-08-21 20:40:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 20:40:51,171 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-08-21 20:40:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:51,172 INFO L225 Difference]: With dead ends: 104 [2020-08-21 20:40:51,172 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 20:40:51,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 20:40:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 20:40:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-21 20:40:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 20:40:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-08-21 20:40:51,177 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-08-21 20:40:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:51,178 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-08-21 20:40:51,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 20:40:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-08-21 20:40:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-21 20:40:51,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:51,178 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:51,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 20:40:51,179 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:51,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:51,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1767090008, now seen corresponding path program 17 times [2020-08-21 20:40:51,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:51,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387488902] [2020-08-21 20:40:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:51,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:51,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:52,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387488902] [2020-08-21 20:40:52,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:52,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 20:40:52,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527338073] [2020-08-21 20:40:52,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 20:40:52,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 20:40:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-21 20:40:52,493 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 31 states. [2020-08-21 20:40:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:52,893 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-08-21 20:40:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 20:40:52,893 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-08-21 20:40:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:52,894 INFO L225 Difference]: With dead ends: 106 [2020-08-21 20:40:52,894 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 20:40:52,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 20:40:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 20:40:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-21 20:40:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 20:40:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-08-21 20:40:52,899 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-08-21 20:40:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:52,900 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-08-21 20:40:52,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 20:40:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-08-21 20:40:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 20:40:52,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:52,901 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:52,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 20:40:52,901 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2057560666, now seen corresponding path program 18 times [2020-08-21 20:40:52,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:52,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647929569] [2020-08-21 20:40:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:52,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:52,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:54,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647929569] [2020-08-21 20:40:54,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:54,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 20:40:54,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103917906] [2020-08-21 20:40:54,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 20:40:54,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:54,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 20:40:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-08-21 20:40:54,271 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-08-21 20:40:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:54,685 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-08-21 20:40:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 20:40:54,686 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-08-21 20:40:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:54,687 INFO L225 Difference]: With dead ends: 108 [2020-08-21 20:40:54,687 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 20:40:54,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 20:40:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 20:40:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-21 20:40:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 20:40:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-08-21 20:40:54,692 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-08-21 20:40:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:54,692 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-08-21 20:40:54,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 20:40:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-08-21 20:40:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-21 20:40:54,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:54,693 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:54,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 20:40:54,694 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:54,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2026988764, now seen corresponding path program 19 times [2020-08-21 20:40:54,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:54,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337577318] [2020-08-21 20:40:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:54,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:54,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:56,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337577318] [2020-08-21 20:40:56,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:56,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-21 20:40:56,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999184646] [2020-08-21 20:40:56,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-21 20:40:56,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:56,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-21 20:40:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 20:40:56,268 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 33 states. [2020-08-21 20:40:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:56,695 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-08-21 20:40:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 20:40:56,695 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-08-21 20:40:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:56,697 INFO L225 Difference]: With dead ends: 110 [2020-08-21 20:40:56,697 INFO L226 Difference]: Without dead ends: 88 [2020-08-21 20:40:56,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 20:40:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-21 20:40:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-21 20:40:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 20:40:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-08-21 20:40:56,703 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-08-21 20:40:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:56,703 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-08-21 20:40:56,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-21 20:40:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-08-21 20:40:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 20:40:56,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:56,704 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:56,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 20:40:56,705 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1582805282, now seen corresponding path program 20 times [2020-08-21 20:40:56,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:56,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629370138] [2020-08-21 20:40:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:56,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:56,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:40:58,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629370138] [2020-08-21 20:40:58,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:58,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-21 20:40:58,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196600555] [2020-08-21 20:40:58,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-21 20:40:58,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:58,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-21 20:40:58,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 20:40:58,241 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-08-21 20:40:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:58,674 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-08-21 20:40:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 20:40:58,674 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-08-21 20:40:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:58,675 INFO L225 Difference]: With dead ends: 112 [2020-08-21 20:40:58,676 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 20:40:58,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 20:40:58,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 20:40:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-21 20:40:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 20:40:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-08-21 20:40:58,684 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-08-21 20:40:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:58,685 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-08-21 20:40:58,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-21 20:40:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-08-21 20:40:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:40:58,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:58,686 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:40:58,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 20:40:58,686 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash -261308320, now seen corresponding path program 21 times [2020-08-21 20:40:58,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:58,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24891574] [2020-08-21 20:40:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:58,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:58,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:40:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:00,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24891574] [2020-08-21 20:41:00,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:00,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-21 20:41:00,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467610979] [2020-08-21 20:41:00,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-21 20:41:00,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:00,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-21 20:41:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 20:41:00,298 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 35 states. [2020-08-21 20:41:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:00,811 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-08-21 20:41:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-21 20:41:00,812 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-08-21 20:41:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:00,813 INFO L225 Difference]: With dead ends: 114 [2020-08-21 20:41:00,813 INFO L226 Difference]: Without dead ends: 92 [2020-08-21 20:41:00,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 20:41:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-21 20:41:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-21 20:41:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 20:41:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-08-21 20:41:00,820 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-08-21 20:41:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:00,820 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-08-21 20:41:00,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-21 20:41:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-08-21 20:41:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 20:41:00,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:00,822 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:00,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 20:41:00,822 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:00,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047454, now seen corresponding path program 22 times [2020-08-21 20:41:00,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:00,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997889841] [2020-08-21 20:41:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:00,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:00,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:02,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997889841] [2020-08-21 20:41:02,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:02,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-21 20:41:02,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491891468] [2020-08-21 20:41:02,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-21 20:41:02,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:02,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-21 20:41:02,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 20:41:02,499 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-08-21 20:41:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:02,828 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-08-21 20:41:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-21 20:41:02,829 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-08-21 20:41:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:02,830 INFO L225 Difference]: With dead ends: 116 [2020-08-21 20:41:02,830 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 20:41:02,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 20:41:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 20:41:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-21 20:41:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 20:41:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-08-21 20:41:02,836 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-08-21 20:41:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:02,836 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-08-21 20:41:02,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-21 20:41:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-08-21 20:41:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 20:41:02,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:02,837 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:02,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-21 20:41:02,837 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash 740735460, now seen corresponding path program 23 times [2020-08-21 20:41:02,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:02,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733456682] [2020-08-21 20:41:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:02,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:02,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:04,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733456682] [2020-08-21 20:41:04,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:04,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-21 20:41:04,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630597574] [2020-08-21 20:41:04,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-21 20:41:04,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-21 20:41:04,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 20:41:04,680 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 37 states. [2020-08-21 20:41:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:05,139 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-08-21 20:41:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 20:41:05,139 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-08-21 20:41:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:05,141 INFO L225 Difference]: With dead ends: 118 [2020-08-21 20:41:05,141 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 20:41:05,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=643, Invalid=917, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 20:41:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 20:41:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-21 20:41:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 20:41:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-08-21 20:41:05,147 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-08-21 20:41:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:05,147 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-08-21 20:41:05,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-21 20:41:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-08-21 20:41:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-21 20:41:05,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:05,148 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:05,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-21 20:41:05,149 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:05,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:05,149 INFO L82 PathProgramCache]: Analyzing trace with hash -721649178, now seen corresponding path program 24 times [2020-08-21 20:41:05,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:05,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590449963] [2020-08-21 20:41:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:05,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:05,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:07,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590449963] [2020-08-21 20:41:07,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:07,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-21 20:41:07,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215665770] [2020-08-21 20:41:07,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-21 20:41:07,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-21 20:41:07,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 20:41:07,041 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-08-21 20:41:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:07,444 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-08-21 20:41:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-21 20:41:07,444 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-08-21 20:41:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:07,445 INFO L225 Difference]: With dead ends: 120 [2020-08-21 20:41:07,445 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 20:41:07,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=679, Invalid=961, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 20:41:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 20:41:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-21 20:41:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-21 20:41:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-08-21 20:41:07,451 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-08-21 20:41:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:07,451 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-08-21 20:41:07,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-21 20:41:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-08-21 20:41:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 20:41:07,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:07,452 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:07,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-21 20:41:07,452 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:07,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1618980504, now seen corresponding path program 25 times [2020-08-21 20:41:07,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:07,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452354276] [2020-08-21 20:41:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:07,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:07,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:09,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452354276] [2020-08-21 20:41:09,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:09,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-21 20:41:09,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591364015] [2020-08-21 20:41:09,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-21 20:41:09,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:09,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-21 20:41:09,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 20:41:09,475 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 39 states. [2020-08-21 20:41:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:09,790 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-08-21 20:41:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-21 20:41:09,791 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-08-21 20:41:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:09,792 INFO L225 Difference]: With dead ends: 122 [2020-08-21 20:41:09,793 INFO L226 Difference]: Without dead ends: 100 [2020-08-21 20:41:09,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 20:41:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-21 20:41:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-21 20:41:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 20:41:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-08-21 20:41:09,799 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-08-21 20:41:09,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:09,799 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-08-21 20:41:09,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-21 20:41:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-08-21 20:41:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 20:41:09,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:09,800 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:09,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-21 20:41:09,800 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:09,801 INFO L82 PathProgramCache]: Analyzing trace with hash -665958294, now seen corresponding path program 26 times [2020-08-21 20:41:09,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:09,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190367787] [2020-08-21 20:41:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:09,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:09,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:11,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190367787] [2020-08-21 20:41:11,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:11,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-21 20:41:11,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704069257] [2020-08-21 20:41:11,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-21 20:41:11,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:11,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-21 20:41:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 20:41:11,914 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 40 states. [2020-08-21 20:41:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:12,221 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-08-21 20:41:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-21 20:41:12,221 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-08-21 20:41:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:12,223 INFO L225 Difference]: With dead ends: 124 [2020-08-21 20:41:12,223 INFO L226 Difference]: Without dead ends: 102 [2020-08-21 20:41:12,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=754, Invalid=1052, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 20:41:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-21 20:41:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-21 20:41:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 20:41:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-08-21 20:41:12,229 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-08-21 20:41:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:12,229 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-08-21 20:41:12,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-21 20:41:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-08-21 20:41:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-21 20:41:12,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:12,230 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:12,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-21 20:41:12,230 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:12,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash 360351468, now seen corresponding path program 27 times [2020-08-21 20:41:12,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:12,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692289081] [2020-08-21 20:41:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:12,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:12,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:14,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692289081] [2020-08-21 20:41:14,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:14,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-21 20:41:14,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3257082] [2020-08-21 20:41:14,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-21 20:41:14,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:14,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-21 20:41:14,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 20:41:14,382 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 41 states. [2020-08-21 20:41:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:14,700 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-08-21 20:41:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-21 20:41:14,700 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-08-21 20:41:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:14,701 INFO L225 Difference]: With dead ends: 126 [2020-08-21 20:41:14,701 INFO L226 Difference]: Without dead ends: 104 [2020-08-21 20:41:14,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 20:41:14,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-21 20:41:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-21 20:41:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 20:41:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-08-21 20:41:14,708 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-08-21 20:41:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:14,708 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-08-21 20:41:14,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-21 20:41:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-08-21 20:41:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 20:41:14,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:14,709 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:14,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-21 20:41:14,710 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:14,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1198445330, now seen corresponding path program 28 times [2020-08-21 20:41:14,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:14,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708863382] [2020-08-21 20:41:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:14,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:14,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:16,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708863382] [2020-08-21 20:41:16,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:16,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-21 20:41:16,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794905680] [2020-08-21 20:41:16,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-21 20:41:16,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:16,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-21 20:41:16,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 20:41:16,989 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 42 states. [2020-08-21 20:41:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:17,416 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-08-21 20:41:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-21 20:41:17,417 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-08-21 20:41:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:17,418 INFO L225 Difference]: With dead ends: 128 [2020-08-21 20:41:17,418 INFO L226 Difference]: Without dead ends: 106 [2020-08-21 20:41:17,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=833, Invalid=1147, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 20:41:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-21 20:41:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-21 20:41:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 20:41:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-08-21 20:41:17,424 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-08-21 20:41:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:17,425 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-08-21 20:41:17,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-21 20:41:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-08-21 20:41:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 20:41:17,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:17,426 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:17,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-21 20:41:17,426 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash -258581904, now seen corresponding path program 29 times [2020-08-21 20:41:17,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:17,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172517294] [2020-08-21 20:41:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:17,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:17,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:19,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172517294] [2020-08-21 20:41:19,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:19,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-21 20:41:19,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72684286] [2020-08-21 20:41:19,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-21 20:41:19,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-21 20:41:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 20:41:19,801 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 43 states. [2020-08-21 20:41:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:20,332 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-08-21 20:41:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-21 20:41:20,332 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-08-21 20:41:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:20,333 INFO L225 Difference]: With dead ends: 130 [2020-08-21 20:41:20,333 INFO L226 Difference]: Without dead ends: 108 [2020-08-21 20:41:20,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=874, Invalid=1196, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 20:41:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-21 20:41:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-21 20:41:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 20:41:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-08-21 20:41:20,340 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-08-21 20:41:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:20,340 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-08-21 20:41:20,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-21 20:41:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-08-21 20:41:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-21 20:41:20,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:20,341 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:20,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-21 20:41:20,341 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:20,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1007038322, now seen corresponding path program 30 times [2020-08-21 20:41:20,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:20,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843874604] [2020-08-21 20:41:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:20,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:22,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843874604] [2020-08-21 20:41:22,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:22,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-21 20:41:22,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791524773] [2020-08-21 20:41:22,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-21 20:41:22,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-21 20:41:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 20:41:22,817 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 44 states. [2020-08-21 20:41:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:23,183 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-08-21 20:41:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-21 20:41:23,184 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 102 [2020-08-21 20:41:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:23,186 INFO L225 Difference]: With dead ends: 132 [2020-08-21 20:41:23,186 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 20:41:23,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=916, Invalid=1246, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 20:41:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 20:41:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-08-21 20:41:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 20:41:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-08-21 20:41:23,193 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2020-08-21 20:41:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:23,194 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-08-21 20:41:23,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-21 20:41:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-08-21 20:41:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 20:41:23,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:23,195 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:23,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-21 20:41:23,195 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:23,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1792330740, now seen corresponding path program 31 times [2020-08-21 20:41:23,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:23,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034680675] [2020-08-21 20:41:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:23,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:23,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:41:25,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034680675] [2020-08-21 20:41:25,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:25,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-21 20:41:25,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476124461] [2020-08-21 20:41:25,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-21 20:41:25,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:25,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-21 20:41:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 20:41:25,852 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 45 states. [2020-08-21 20:41:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:26,412 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-08-21 20:41:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-21 20:41:26,413 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 104 [2020-08-21 20:41:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:26,414 INFO L225 Difference]: With dead ends: 134 [2020-08-21 20:41:26,414 INFO L226 Difference]: Without dead ends: 112 [2020-08-21 20:41:26,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=959, Invalid=1297, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 20:41:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-21 20:41:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-08-21 20:41:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 20:41:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-08-21 20:41:26,420 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 104 [2020-08-21 20:41:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:26,420 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-08-21 20:41:26,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-21 20:41:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-08-21 20:41:26,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-21 20:41:26,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:26,421 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:26,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-21 20:41:26,421 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:26,422 INFO L82 PathProgramCache]: Analyzing trace with hash 544100342, now seen corresponding path program 32 times [2020-08-21 20:41:26,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:26,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731008808] [2020-08-21 20:41:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:26,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:26,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:41:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat