/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:29:48,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:29:48,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:29:48,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:29:48,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:29:48,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:29:48,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:29:48,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:29:48,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:29:48,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:29:48,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:29:48,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:29:48,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:29:48,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:29:48,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:29:48,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:29:48,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:29:48,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:29:48,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:29:48,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:29:48,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:29:48,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:29:48,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:29:48,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:29:48,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:29:48,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:29:48,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:29:48,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:29:48,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:29:48,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 04:29:48,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 04:29:48,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 04:29:48,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 04:29:48,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 04:29:48,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 04:29:48,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 04:29:48,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 04:29:48,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 04:29:48,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:29:48,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:29:48,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:29:48,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 04:29:48,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:29:48,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:29:48,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:29:48,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:29:48,874 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:29:48,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:29:48,875 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:29:48,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:29:48,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:29:48,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:29:48,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:29:48,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:29:48,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:29:48,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:29:48,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:29:48,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:29:48,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:29:48,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:29:48,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:29:48,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:29:48,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:29:48,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:29:48,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:29:48,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:29:48,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:29:48,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:29:48,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:29:48,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:29:48,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:29:48,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:29:49,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:29:49,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:29:49,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:29:49,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:29:49,219 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:29:49,220 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-19 04:29:49,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f3cf12a5/77fb3609ebcd488c84bb2c694c9b20dd/FLAGfedc3a88a [2020-08-19 04:29:49,764 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:29:49,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-19 04:29:49,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f3cf12a5/77fb3609ebcd488c84bb2c694c9b20dd/FLAGfedc3a88a [2020-08-19 04:29:50,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f3cf12a5/77fb3609ebcd488c84bb2c694c9b20dd [2020-08-19 04:29:50,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:29:50,179 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:29:50,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:29:50,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:29:50,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:29:50,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bedca4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50, skipping insertion in model container [2020-08-19 04:29:50,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:29:50,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:29:50,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:29:50,480 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:29:50,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:29:50,511 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:29:50,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50 WrapperNode [2020-08-19 04:29:50,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:29:50,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:29:50,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:29:50,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:29:50,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:29:50,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:29:50,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:29:50,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:29:50,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:29:50,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:29:50,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:29:50,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 04:29:50,729 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-19 04:29:50,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:29:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:29:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 04:29:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 04:29:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-08-19 04:29:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 04:29:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 04:29:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 04:29:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:29:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 04:29:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 04:29:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 04:29:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:29:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:29:51,069 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:29:51,069 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-19 04:29:51,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:29:51 BoogieIcfgContainer [2020-08-19 04:29:51,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:29:51,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:29:51,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:29:51,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:29:51,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:29:50" (1/3) ... [2020-08-19 04:29:51,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f14d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:29:51, skipping insertion in model container [2020-08-19 04:29:51,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (2/3) ... [2020-08-19 04:29:51,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f14d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:29:51, skipping insertion in model container [2020-08-19 04:29:51,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:29:51" (3/3) ... [2020-08-19 04:29:51,087 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-08-19 04:29:51,098 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:29:51,105 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:29:51,120 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:29:51,146 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:29:51,147 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:29:51,147 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:29:51,148 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:29:51,148 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:29:51,148 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:29:51,148 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:29:51,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:29:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 04:29:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:29:51,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:51,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:29:51,177 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:51,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-08-19 04:29:51,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:51,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951632255] [2020-08-19 04:29:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:51,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951632255] [2020-08-19 04:29:51,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:51,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 04:29:51,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37698412] [2020-08-19 04:29:51,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:29:51,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:51,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:29:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:29:51,440 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-08-19 04:29:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:51,600 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-08-19 04:29:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:29:51,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-19 04:29:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:51,613 INFO L225 Difference]: With dead ends: 59 [2020-08-19 04:29:51,613 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 04:29:51,617 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 [2020-08-19 04:29:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 04:29:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-19 04:29:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 04:29:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-19 04:29:51,661 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-08-19 04:29:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:51,661 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-19 04:29:51,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:29:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-19 04:29:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:29:51,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:51,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:29:51,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:29:51,664 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-08-19 04:29:51,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:51,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248212081] [2020-08-19 04:29:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:51,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248212081] [2020-08-19 04:29:51,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:51,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 04:29:51,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772428] [2020-08-19 04:29:51,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:29:51,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:51,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:29:51,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:29:51,861 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-19 04:29:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:52,070 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-19 04:29:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:29:52,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-19 04:29:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:52,073 INFO L225 Difference]: With dead ends: 48 [2020-08-19 04:29:52,073 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 04:29:52,074 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 [2020-08-19 04:29:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 04:29:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-19 04:29:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 04:29:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-19 04:29:52,096 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-19 04:29:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:52,096 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-19 04:29:52,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:29:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-19 04:29:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:29:52,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:52,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:29:52,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:29:52,098 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:52,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:52,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-08-19 04:29:52,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:52,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964493878] [2020-08-19 04:29:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:52,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964493878] [2020-08-19 04:29:52,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:52,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:29:52,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459768262] [2020-08-19 04:29:52,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:29:52,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:52,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:29:52,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:29:52,352 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-19 04:29:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:52,531 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-19 04:29:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:29:52,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-19 04:29:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:52,533 INFO L225 Difference]: With dead ends: 50 [2020-08-19 04:29:52,533 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 04:29:52,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:29:52,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 04:29:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-19 04:29:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 04:29:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-19 04:29:52,542 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-19 04:29:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:52,542 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-19 04:29:52,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:29:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-19 04:29:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 04:29:52,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:52,544 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] [2020-08-19 04:29:52,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:29:52,545 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:52,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2059999690, now seen corresponding path program 2 times [2020-08-19 04:29:52,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:52,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841574524] [2020-08-19 04:29:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:52,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841574524] [2020-08-19 04:29:52,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:52,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:29:52,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154284413] [2020-08-19 04:29:52,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:29:52,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:29:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:29:52,748 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-19 04:29:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:52,962 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-08-19 04:29:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:29:52,962 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-19 04:29:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:52,964 INFO L225 Difference]: With dead ends: 52 [2020-08-19 04:29:52,964 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 04:29:52,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:29:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 04:29:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-19 04:29:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 04:29:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-19 04:29:52,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-19 04:29:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:52,972 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-19 04:29:52,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:29:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-19 04:29:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 04:29:52,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:52,974 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] [2020-08-19 04:29:52,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:29:52,975 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:52,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:52,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1428164148, now seen corresponding path program 3 times [2020-08-19 04:29:52,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:52,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186207270] [2020-08-19 04:29:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:53,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186207270] [2020-08-19 04:29:53,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:53,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:29:53,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746055608] [2020-08-19 04:29:53,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:29:53,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:53,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:29:53,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:29:53,236 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-19 04:29:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:53,403 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-08-19 04:29:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:29:53,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-19 04:29:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:53,405 INFO L225 Difference]: With dead ends: 54 [2020-08-19 04:29:53,405 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 04:29:53,406 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 [2020-08-19 04:29:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 04:29:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-19 04:29:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-19 04:29:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-19 04:29:53,413 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-19 04:29:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:53,413 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-19 04:29:53,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:29:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-19 04:29:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 04:29:53,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:53,415 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] [2020-08-19 04:29:53,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:29:53,416 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash 815845710, now seen corresponding path program 4 times [2020-08-19 04:29:53,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:53,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730088519] [2020-08-19 04:29:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:53,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730088519] [2020-08-19 04:29:53,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:53,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:29:53,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596224634] [2020-08-19 04:29:53,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:29:53,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:53,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:29:53,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:29:53,680 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-19 04:29:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:53,903 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-19 04:29:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:29:53,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-19 04:29:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:53,905 INFO L225 Difference]: With dead ends: 56 [2020-08-19 04:29:53,905 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 04:29:53,906 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 [2020-08-19 04:29:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 04:29:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-19 04:29:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 04:29:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-19 04:29:53,912 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-19 04:29:53,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:53,913 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-19 04:29:53,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:29:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-19 04:29:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 04:29:53,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:53,920 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] [2020-08-19 04:29:53,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:29:53,920 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1235736656, now seen corresponding path program 5 times [2020-08-19 04:29:53,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:53,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380763518] [2020-08-19 04:29:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:54,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380763518] [2020-08-19 04:29:54,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:54,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:29:54,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989454119] [2020-08-19 04:29:54,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:29:54,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:29:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:29:54,211 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-19 04:29:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:54,415 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-19 04:29:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:29:54,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-19 04:29:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:54,416 INFO L225 Difference]: With dead ends: 58 [2020-08-19 04:29:54,416 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 04:29:54,417 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 [2020-08-19 04:29:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 04:29:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-19 04:29:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 04:29:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-19 04:29:54,426 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-19 04:29:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:54,426 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-19 04:29:54,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:29:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-19 04:29:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 04:29:54,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:54,428 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] [2020-08-19 04:29:54,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:29:54,428 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1024009938, now seen corresponding path program 6 times [2020-08-19 04:29:54,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:54,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515313246] [2020-08-19 04:29:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:54,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515313246] [2020-08-19 04:29:54,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:54,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 04:29:54,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009341997] [2020-08-19 04:29:54,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:29:54,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:54,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:29:54,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:29:54,793 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-19 04:29:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:55,024 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-19 04:29:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 04:29:55,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-19 04:29:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:55,025 INFO L225 Difference]: With dead ends: 60 [2020-08-19 04:29:55,025 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 04:29:55,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:29:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 04:29:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-19 04:29:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-19 04:29:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-19 04:29:55,032 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-19 04:29:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:55,033 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-19 04:29:55,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 04:29:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-19 04:29:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 04:29:55,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:55,034 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] [2020-08-19 04:29:55,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:29:55,035 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:55,035 INFO L82 PathProgramCache]: Analyzing trace with hash -581903148, now seen corresponding path program 7 times [2020-08-19 04:29:55,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:55,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676956787] [2020-08-19 04:29:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:55,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676956787] [2020-08-19 04:29:55,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:55,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:29:55,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286236428] [2020-08-19 04:29:55,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:29:55,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:55,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:29:55,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:29:55,394 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-08-19 04:29:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:55,581 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-19 04:29:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:29:55,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-08-19 04:29:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:55,582 INFO L225 Difference]: With dead ends: 62 [2020-08-19 04:29:55,583 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 04:29:55,583 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 [2020-08-19 04:29:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 04:29:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-19 04:29:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 04:29:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-19 04:29:55,593 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-08-19 04:29:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:55,595 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-19 04:29:55,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:29:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-19 04:29:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-19 04:29:55,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:55,597 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] [2020-08-19 04:29:55,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:29:55,598 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1971119530, now seen corresponding path program 8 times [2020-08-19 04:29:55,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:55,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462657184] [2020-08-19 04:29:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:56,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462657184] [2020-08-19 04:29:56,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:56,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 04:29:56,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413706438] [2020-08-19 04:29:56,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 04:29:56,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 04:29:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:29:56,106 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-08-19 04:29:56,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:56,354 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-19 04:29:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 04:29:56,354 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-19 04:29:56,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:56,355 INFO L225 Difference]: With dead ends: 64 [2020-08-19 04:29:56,355 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 04:29:56,356 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 [2020-08-19 04:29:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 04:29:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-19 04:29:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 04:29:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-19 04:29:56,363 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-08-19 04:29:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:56,363 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-19 04:29:56,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 04:29:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-19 04:29:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 04:29:56,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:56,364 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] [2020-08-19 04:29:56,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:29:56,365 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1273233576, now seen corresponding path program 9 times [2020-08-19 04:29:56,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:56,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689822546] [2020-08-19 04:29:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-19 04:29:56,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689822546] [2020-08-19 04:29:56,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:56,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:29:56,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649196809] [2020-08-19 04:29:56,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:29:56,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:29:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:29:56,428 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-08-19 04:29:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:56,510 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-08-19 04:29:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 04:29:56,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-19 04:29:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:56,513 INFO L225 Difference]: With dead ends: 65 [2020-08-19 04:29:56,513 INFO L226 Difference]: Without dead ends: 53 [2020-08-19 04:29:56,514 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 [2020-08-19 04:29:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-19 04:29:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-08-19 04:29:56,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 04:29:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-19 04:29:56,524 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-08-19 04:29:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:56,524 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-19 04:29:56,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:29:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-19 04:29:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 04:29:56,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:56,525 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] [2020-08-19 04:29:56,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:29:56,526 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:56,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1053921041, now seen corresponding path program 1 times [2020-08-19 04:29:56,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:56,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18302891] [2020-08-19 04:29:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-19 04:29:56,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18302891] [2020-08-19 04:29:56,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:56,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:29:56,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560045816] [2020-08-19 04:29:56,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:29:56,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:56,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:29:56,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:29:56,598 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-19 04:29:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:56,717 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-08-19 04:29:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:29:56,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-19 04:29:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:56,719 INFO L225 Difference]: With dead ends: 73 [2020-08-19 04:29:56,719 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 04:29:56,721 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 [2020-08-19 04:29:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 04:29:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-08-19 04:29:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 04:29:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-08-19 04:29:56,733 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 41 [2020-08-19 04:29:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:56,733 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-08-19 04:29:56,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:29:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-08-19 04:29:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 04:29:56,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:56,737 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] [2020-08-19 04:29:56,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:29:56,738 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash -159448072, now seen corresponding path program 2 times [2020-08-19 04:29:56,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:56,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776386271] [2020-08-19 04:29:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-19 04:29:56,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776386271] [2020-08-19 04:29:56,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:56,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:29:56,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627091045] [2020-08-19 04:29:56,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:29:56,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:56,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:29:56,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:29:56,824 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-08-19 04:29:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:56,895 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-08-19 04:29:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 04:29:56,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-19 04:29:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:56,896 INFO L225 Difference]: With dead ends: 69 [2020-08-19 04:29:56,896 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 04:29:56,898 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 [2020-08-19 04:29:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 04:29:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-19 04:29:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 04:29:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-08-19 04:29:56,908 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-08-19 04:29:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:56,909 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-08-19 04:29:56,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:29:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-08-19 04:29:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 04:29:56,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:56,910 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] [2020-08-19 04:29:56,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:29:56,910 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:56,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1139281096, now seen corresponding path program 1 times [2020-08-19 04:29:56,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:56,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130801502] [2020-08-19 04:29:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:57,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:29:57,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130801502] [2020-08-19 04:29:57,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:57,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 04:29:57,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821016215] [2020-08-19 04:29:57,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 04:29:57,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 04:29:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:29:57,424 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2020-08-19 04:29:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:57,645 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-08-19 04:29:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 04:29:57,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-08-19 04:29:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:57,648 INFO L225 Difference]: With dead ends: 74 [2020-08-19 04:29:57,648 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 04:29:57,649 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 [2020-08-19 04:29:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 04:29:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-19 04:29:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 04:29:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-19 04:29:57,656 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-08-19 04:29:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:57,657 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-19 04:29:57,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 04:29:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-19 04:29:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 04:29:57,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:57,658 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] [2020-08-19 04:29:57,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:29:57,658 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:57,659 INFO L82 PathProgramCache]: Analyzing trace with hash 763672122, now seen corresponding path program 2 times [2020-08-19 04:29:57,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:57,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123689144] [2020-08-19 04:29:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:57,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:57,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:29:58,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123689144] [2020-08-19 04:29:58,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:58,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 04:29:58,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48137307] [2020-08-19 04:29:58,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 04:29:58,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:58,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 04:29:58,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:29:58,142 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-08-19 04:29:58,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:58,387 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-08-19 04:29:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 04:29:58,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-19 04:29:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:58,389 INFO L225 Difference]: With dead ends: 76 [2020-08-19 04:29:58,389 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 04:29:58,390 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 [2020-08-19 04:29:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 04:29:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-19 04:29:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-19 04:29:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-08-19 04:29:58,405 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-08-19 04:29:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:58,405 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-08-19 04:29:58,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 04:29:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-08-19 04:29:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 04:29:58,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:58,406 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] [2020-08-19 04:29:58,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:29:58,406 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash -154353476, now seen corresponding path program 3 times [2020-08-19 04:29:58,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:58,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528708756] [2020-08-19 04:29:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:58,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:58,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:29:58,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528708756] [2020-08-19 04:29:58,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:58,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 04:29:58,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567681779] [2020-08-19 04:29:58,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 04:29:58,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 04:29:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:29:58,945 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-08-19 04:29:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:59,208 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-08-19 04:29:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 04:29:59,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-08-19 04:29:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:59,210 INFO L225 Difference]: With dead ends: 78 [2020-08-19 04:29:59,210 INFO L226 Difference]: Without dead ends: 56 [2020-08-19 04:29:59,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-08-19 04:29:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-19 04:29:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-19 04:29:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 04:29:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-19 04:29:59,216 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-08-19 04:29:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:59,216 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-19 04:29:59,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 04:29:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-19 04:29:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 04:29:59,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:59,217 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] [2020-08-19 04:29:59,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:29:59,217 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1908657474, now seen corresponding path program 4 times [2020-08-19 04:29:59,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:59,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777364205] [2020-08-19 04:29:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:59,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:59,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:29:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:29:59,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777364205] [2020-08-19 04:29:59,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:59,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 04:29:59,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039729305] [2020-08-19 04:29:59,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 04:29:59,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:59,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 04:29:59,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:29:59,804 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-08-19 04:30:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:00,058 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-19 04:30:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 04:30:00,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-19 04:30:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:00,059 INFO L225 Difference]: With dead ends: 80 [2020-08-19 04:30:00,059 INFO L226 Difference]: Without dead ends: 58 [2020-08-19 04:30:00,064 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 [2020-08-19 04:30:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-19 04:30:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-19 04:30:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 04:30:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-19 04:30:00,071 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-08-19 04:30:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:00,072 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-19 04:30:00,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 04:30:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-19 04:30:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 04:30:00,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:00,073 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] [2020-08-19 04:30:00,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 04:30:00,073 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 127347776, now seen corresponding path program 5 times [2020-08-19 04:30:00,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:00,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668948353] [2020-08-19 04:30:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:00,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:00,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668948353] [2020-08-19 04:30:00,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:00,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 04:30:00,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51978912] [2020-08-19 04:30:00,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 04:30:00,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:00,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 04:30:00,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:30:00,712 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 19 states. [2020-08-19 04:30:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:00,986 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-08-19 04:30:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 04:30:00,987 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-08-19 04:30:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:00,988 INFO L225 Difference]: With dead ends: 82 [2020-08-19 04:30:00,988 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 04:30:00,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:30:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 04:30:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-19 04:30:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-19 04:30:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-19 04:30:00,993 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-08-19 04:30:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:00,993 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-19 04:30:00,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 04:30:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-19 04:30:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 04:30:00,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:00,995 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] [2020-08-19 04:30:00,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 04:30:00,995 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1776693950, now seen corresponding path program 6 times [2020-08-19 04:30:00,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:00,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904392158] [2020-08-19 04:30:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:01,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:01,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:01,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904392158] [2020-08-19 04:30:01,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:01,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 04:30:01,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737001551] [2020-08-19 04:30:01,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 04:30:01,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:01,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 04:30:01,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-08-19 04:30:01,694 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-08-19 04:30:01,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:01,998 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-08-19 04:30:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 04:30:02,003 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-08-19 04:30:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:02,004 INFO L225 Difference]: With dead ends: 84 [2020-08-19 04:30:02,004 INFO L226 Difference]: Without dead ends: 62 [2020-08-19 04:30:02,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:30:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-19 04:30:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-19 04:30:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 04:30:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-08-19 04:30:02,012 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-08-19 04:30:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:02,012 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-08-19 04:30:02,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 04:30:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-08-19 04:30:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 04:30:02,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:02,017 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] [2020-08-19 04:30:02,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 04:30:02,017 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1904724540, now seen corresponding path program 7 times [2020-08-19 04:30:02,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:02,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532917660] [2020-08-19 04:30:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:02,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:02,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:02,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532917660] [2020-08-19 04:30:02,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:02,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 04:30:02,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303639234] [2020-08-19 04:30:02,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 04:30:02,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 04:30:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:30:02,854 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 21 states. [2020-08-19 04:30:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:03,118 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-08-19 04:30:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 04:30:03,119 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-08-19 04:30:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:03,120 INFO L225 Difference]: With dead ends: 86 [2020-08-19 04:30:03,121 INFO L226 Difference]: Without dead ends: 64 [2020-08-19 04:30:03,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2020-08-19 04:30:03,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-19 04:30:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-19 04:30:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 04:30:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-08-19 04:30:03,133 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-08-19 04:30:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:03,135 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-08-19 04:30:03,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 04:30:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-08-19 04:30:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 04:30:03,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:03,137 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] [2020-08-19 04:30:03,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 04:30:03,138 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash -388069946, now seen corresponding path program 8 times [2020-08-19 04:30:03,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:03,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691996433] [2020-08-19 04:30:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:03,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:03,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:04,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691996433] [2020-08-19 04:30:04,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:04,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 04:30:04,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850999344] [2020-08-19 04:30:04,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 04:30:04,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:04,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 04:30:04,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:30:04,005 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-08-19 04:30:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:04,312 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-08-19 04:30:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 04:30:04,312 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-19 04:30:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:04,314 INFO L225 Difference]: With dead ends: 88 [2020-08-19 04:30:04,314 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 04:30:04,315 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 [2020-08-19 04:30:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 04:30:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-19 04:30:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-19 04:30:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-08-19 04:30:04,320 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-08-19 04:30:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:04,320 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-08-19 04:30:04,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 04:30:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-08-19 04:30:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 04:30:04,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:04,321 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] [2020-08-19 04:30:04,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 04:30:04,321 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:04,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1123081544, now seen corresponding path program 9 times [2020-08-19 04:30:04,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:04,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577378435] [2020-08-19 04:30:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:04,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:04,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:05,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577378435] [2020-08-19 04:30:05,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:05,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 04:30:05,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462446765] [2020-08-19 04:30:05,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 04:30:05,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 04:30:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:30:05,250 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2020-08-19 04:30:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:05,600 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-08-19 04:30:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 04:30:05,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-08-19 04:30:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:05,605 INFO L225 Difference]: With dead ends: 90 [2020-08-19 04:30:05,605 INFO L226 Difference]: Without dead ends: 68 [2020-08-19 04:30:05,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2020-08-19 04:30:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-19 04:30:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-19 04:30:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 04:30:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-08-19 04:30:05,611 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-08-19 04:30:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:05,612 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-08-19 04:30:05,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 04:30:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-08-19 04:30:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 04:30:05,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:05,613 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] [2020-08-19 04:30:05,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 04:30:05,613 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:05,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1640717386, now seen corresponding path program 10 times [2020-08-19 04:30:05,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:05,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882744629] [2020-08-19 04:30:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:05,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:05,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:06,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882744629] [2020-08-19 04:30:06,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:06,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 04:30:06,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737754984] [2020-08-19 04:30:06,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 04:30:06,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 04:30:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-08-19 04:30:06,682 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-08-19 04:30:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:06,984 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-08-19 04:30:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 04:30:06,985 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-08-19 04:30:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:06,986 INFO L225 Difference]: With dead ends: 92 [2020-08-19 04:30:06,986 INFO L226 Difference]: Without dead ends: 70 [2020-08-19 04:30:06,987 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 [2020-08-19 04:30:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-19 04:30:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-19 04:30:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 04:30:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-08-19 04:30:06,992 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-08-19 04:30:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:06,992 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-08-19 04:30:06,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 04:30:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-08-19 04:30:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-19 04:30:06,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:06,993 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] [2020-08-19 04:30:06,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 04:30:06,994 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash 872555212, now seen corresponding path program 11 times [2020-08-19 04:30:06,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:06,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636808232] [2020-08-19 04:30:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:07,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:07,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:07,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636808232] [2020-08-19 04:30:07,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:07,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 04:30:07,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942852774] [2020-08-19 04:30:07,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 04:30:07,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 04:30:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-08-19 04:30:07,905 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 25 states. [2020-08-19 04:30:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:08,243 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-08-19 04:30:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 04:30:08,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-08-19 04:30:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:08,244 INFO L225 Difference]: With dead ends: 94 [2020-08-19 04:30:08,245 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 04:30:08,245 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 [2020-08-19 04:30:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 04:30:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-19 04:30:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 04:30:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-08-19 04:30:08,251 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-08-19 04:30:08,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:08,251 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-08-19 04:30:08,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 04:30:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-08-19 04:30:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 04:30:08,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:08,252 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] [2020-08-19 04:30:08,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 04:30:08,255 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1403080910, now seen corresponding path program 12 times [2020-08-19 04:30:08,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:08,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145731051] [2020-08-19 04:30:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:08,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:08,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:09,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145731051] [2020-08-19 04:30:09,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:09,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 04:30:09,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084871169] [2020-08-19 04:30:09,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 04:30:09,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 04:30:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-19 04:30:09,432 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-08-19 04:30:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:09,806 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-08-19 04:30:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 04:30:09,807 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-08-19 04:30:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:09,808 INFO L225 Difference]: With dead ends: 96 [2020-08-19 04:30:09,808 INFO L226 Difference]: Without dead ends: 74 [2020-08-19 04:30:09,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2020-08-19 04:30:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-19 04:30:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-19 04:30:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 04:30:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-08-19 04:30:09,813 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-08-19 04:30:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:09,813 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-08-19 04:30:09,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 04:30:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-08-19 04:30:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 04:30:09,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:09,814 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] [2020-08-19 04:30:09,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 04:30:09,814 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash 137168464, now seen corresponding path program 13 times [2020-08-19 04:30:09,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:09,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180078448] [2020-08-19 04:30:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:09,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:09,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:10,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180078448] [2020-08-19 04:30:10,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:10,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 04:30:10,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56999813] [2020-08-19 04:30:10,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 04:30:10,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 04:30:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-08-19 04:30:10,916 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 27 states. [2020-08-19 04:30:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:11,231 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-08-19 04:30:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 04:30:11,232 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-08-19 04:30:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:11,233 INFO L225 Difference]: With dead ends: 98 [2020-08-19 04:30:11,233 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 04:30:11,234 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 [2020-08-19 04:30:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 04:30:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-19 04:30:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 04:30:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-08-19 04:30:11,238 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-08-19 04:30:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:11,239 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-08-19 04:30:11,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 04:30:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-08-19 04:30:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 04:30:11,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:11,240 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] [2020-08-19 04:30:11,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 04:30:11,240 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash -928947374, now seen corresponding path program 14 times [2020-08-19 04:30:11,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:11,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777234787] [2020-08-19 04:30:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:11,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:11,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:12,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777234787] [2020-08-19 04:30:12,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:12,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 04:30:12,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225125751] [2020-08-19 04:30:12,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 04:30:12,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 04:30:12,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-08-19 04:30:12,407 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-08-19 04:30:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:12,726 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-08-19 04:30:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 04:30:12,727 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-08-19 04:30:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:12,728 INFO L225 Difference]: With dead ends: 100 [2020-08-19 04:30:12,728 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 04:30:12,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2020-08-19 04:30:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 04:30:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-19 04:30:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-19 04:30:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-08-19 04:30:12,734 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-08-19 04:30:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:12,735 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-08-19 04:30:12,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 04:30:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-08-19 04:30:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 04:30:12,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:12,736 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] [2020-08-19 04:30:12,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 04:30:12,736 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:12,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1030916052, now seen corresponding path program 15 times [2020-08-19 04:30:12,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:12,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873397420] [2020-08-19 04:30:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:12,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:12,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:13,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873397420] [2020-08-19 04:30:13,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:13,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 04:30:13,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469992088] [2020-08-19 04:30:13,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 04:30:13,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:13,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 04:30:13,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-08-19 04:30:13,943 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 29 states. [2020-08-19 04:30:14,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:14,342 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-08-19 04:30:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 04:30:14,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-08-19 04:30:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:14,344 INFO L225 Difference]: With dead ends: 102 [2020-08-19 04:30:14,344 INFO L226 Difference]: Without dead ends: 80 [2020-08-19 04:30:14,345 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 [2020-08-19 04:30:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-19 04:30:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-19 04:30:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 04:30:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-19 04:30:14,350 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-08-19 04:30:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:14,351 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-19 04:30:14,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 04:30:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-19 04:30:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 04:30:14,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:14,352 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] [2020-08-19 04:30:14,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 04:30:14,352 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:14,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1030974506, now seen corresponding path program 16 times [2020-08-19 04:30:14,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:14,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881638012] [2020-08-19 04:30:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:14,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:14,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:15,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881638012] [2020-08-19 04:30:15,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:15,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 04:30:15,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474086579] [2020-08-19 04:30:15,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 04:30:15,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:15,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 04:30:15,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-08-19 04:30:15,713 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-08-19 04:30:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:16,025 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-08-19 04:30:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-19 04:30:16,026 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-08-19 04:30:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:16,027 INFO L225 Difference]: With dead ends: 104 [2020-08-19 04:30:16,027 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 04:30:16,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 04:30:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 04:30:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-19 04:30:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 04:30:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-08-19 04:30:16,032 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-08-19 04:30:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:16,032 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-08-19 04:30:16,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 04:30:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-08-19 04:30:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-19 04:30:16,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:16,033 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] [2020-08-19 04:30:16,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 04:30:16,034 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:16,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1767090008, now seen corresponding path program 17 times [2020-08-19 04:30:16,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:16,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034162564] [2020-08-19 04:30:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:16,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:16,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:17,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034162564] [2020-08-19 04:30:17,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:17,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-19 04:30:17,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633562762] [2020-08-19 04:30:17,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-19 04:30:17,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:17,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-19 04:30:17,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-19 04:30:17,475 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 31 states. [2020-08-19 04:30:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:17,910 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-08-19 04:30:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-19 04:30:17,910 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-08-19 04:30:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:17,911 INFO L225 Difference]: With dead ends: 106 [2020-08-19 04:30:17,912 INFO L226 Difference]: Without dead ends: 84 [2020-08-19 04:30:17,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 04:30:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-19 04:30:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-19 04:30:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 04:30:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-08-19 04:30:17,917 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-08-19 04:30:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:17,917 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-08-19 04:30:17,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-19 04:30:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-08-19 04:30:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 04:30:17,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:17,918 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] [2020-08-19 04:30:17,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 04:30:17,918 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2057560666, now seen corresponding path program 18 times [2020-08-19 04:30:17,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:17,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624920319] [2020-08-19 04:30:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:17,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:17,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:19,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624920319] [2020-08-19 04:30:19,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:19,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 04:30:19,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642874537] [2020-08-19 04:30:19,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 04:30:19,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 04:30:19,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-08-19 04:30:19,393 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-08-19 04:30:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:19,825 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-08-19 04:30:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 04:30:19,826 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-08-19 04:30:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:19,827 INFO L225 Difference]: With dead ends: 108 [2020-08-19 04:30:19,827 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 04:30:19,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 04:30:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 04:30:19,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-19 04:30:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 04:30:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-08-19 04:30:19,833 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-08-19 04:30:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:19,834 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-08-19 04:30:19,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 04:30:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-08-19 04:30:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-19 04:30:19,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:19,835 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] [2020-08-19 04:30:19,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 04:30:19,835 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:19,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2026988764, now seen corresponding path program 19 times [2020-08-19 04:30:19,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:19,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574679527] [2020-08-19 04:30:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:19,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:19,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:21,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574679527] [2020-08-19 04:30:21,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:21,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-19 04:30:21,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215152204] [2020-08-19 04:30:21,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-19 04:30:21,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-19 04:30:21,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 04:30:21,379 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 33 states. [2020-08-19 04:30:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:21,830 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-08-19 04:30:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 04:30:21,831 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-08-19 04:30:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:21,832 INFO L225 Difference]: With dead ends: 110 [2020-08-19 04:30:21,832 INFO L226 Difference]: Without dead ends: 88 [2020-08-19 04:30:21,833 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 [2020-08-19 04:30:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-19 04:30:21,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-19 04:30:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 04:30:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-08-19 04:30:21,839 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-08-19 04:30:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:21,839 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-08-19 04:30:21,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-19 04:30:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-08-19 04:30:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 04:30:21,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:21,840 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] [2020-08-19 04:30:21,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 04:30:21,841 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1582805282, now seen corresponding path program 20 times [2020-08-19 04:30:21,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:21,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568283795] [2020-08-19 04:30:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:21,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:21,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:23,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568283795] [2020-08-19 04:30:23,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:23,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-19 04:30:23,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080469962] [2020-08-19 04:30:23,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-19 04:30:23,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-19 04:30:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 04:30:23,506 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-08-19 04:30:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:23,965 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-08-19 04:30:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-19 04:30:23,965 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-08-19 04:30:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:23,966 INFO L225 Difference]: With dead ends: 112 [2020-08-19 04:30:23,967 INFO L226 Difference]: Without dead ends: 90 [2020-08-19 04:30:23,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 04:30:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-19 04:30:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-19 04:30:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 04:30:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-08-19 04:30:23,972 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-08-19 04:30:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:23,973 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-08-19 04:30:23,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-19 04:30:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-08-19 04:30:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-19 04:30:23,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:23,974 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] [2020-08-19 04:30:23,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 04:30:23,974 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash -261308320, now seen corresponding path program 21 times [2020-08-19 04:30:23,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:23,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333770562] [2020-08-19 04:30:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:24,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:24,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:25,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333770562] [2020-08-19 04:30:25,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:25,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-19 04:30:25,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68320070] [2020-08-19 04:30:25,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-19 04:30:25,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:25,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-19 04:30:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 04:30:25,733 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 35 states. [2020-08-19 04:30:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:26,189 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-08-19 04:30:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-19 04:30:26,190 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-08-19 04:30:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:26,191 INFO L225 Difference]: With dead ends: 114 [2020-08-19 04:30:26,191 INFO L226 Difference]: Without dead ends: 92 [2020-08-19 04:30:26,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 04:30:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-19 04:30:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-19 04:30:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 04:30:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-08-19 04:30:26,203 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-08-19 04:30:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:26,204 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-08-19 04:30:26,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-19 04:30:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-08-19 04:30:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 04:30:26,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:26,205 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] [2020-08-19 04:30:26,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-19 04:30:26,205 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:26,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047454, now seen corresponding path program 22 times [2020-08-19 04:30:26,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:26,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962155730] [2020-08-19 04:30:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:28,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962155730] [2020-08-19 04:30:28,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:28,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-19 04:30:28,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829692871] [2020-08-19 04:30:28,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-19 04:30:28,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:28,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-19 04:30:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-08-19 04:30:28,011 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-08-19 04:30:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:28,388 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-08-19 04:30:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-19 04:30:28,389 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-08-19 04:30:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:28,389 INFO L225 Difference]: With dead ends: 116 [2020-08-19 04:30:28,390 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 04:30:28,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 04:30:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 04:30:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-19 04:30:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-19 04:30:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-08-19 04:30:28,396 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-08-19 04:30:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:28,397 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-08-19 04:30:28,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-19 04:30:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-08-19 04:30:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-19 04:30:28,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:28,398 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] [2020-08-19 04:30:28,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-19 04:30:28,398 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 740735460, now seen corresponding path program 23 times [2020-08-19 04:30:28,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:28,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679124487] [2020-08-19 04:30:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:28,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:28,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:30,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679124487] [2020-08-19 04:30:30,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:30,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-19 04:30:30,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283241308] [2020-08-19 04:30:30,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-19 04:30:30,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:30,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-19 04:30:30,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 04:30:30,280 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 37 states. [2020-08-19 04:30:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:30,752 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-08-19 04:30:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-19 04:30:30,752 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-08-19 04:30:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:30,754 INFO L225 Difference]: With dead ends: 118 [2020-08-19 04:30:30,754 INFO L226 Difference]: Without dead ends: 96 [2020-08-19 04:30:30,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=643, Invalid=917, Unknown=0, NotChecked=0, Total=1560 [2020-08-19 04:30:30,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-19 04:30:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-19 04:30:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 04:30:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-08-19 04:30:30,759 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-08-19 04:30:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:30,760 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-08-19 04:30:30,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-19 04:30:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-08-19 04:30:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-19 04:30:30,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:30,761 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] [2020-08-19 04:30:30,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-19 04:30:30,761 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash -721649178, now seen corresponding path program 24 times [2020-08-19 04:30:30,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:30,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784232130] [2020-08-19 04:30:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:30,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:30,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:32,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784232130] [2020-08-19 04:30:32,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:32,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-19 04:30:32,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446495854] [2020-08-19 04:30:32,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-19 04:30:32,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-19 04:30:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 04:30:32,702 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-08-19 04:30:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:33,151 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-08-19 04:30:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-19 04:30:33,152 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-08-19 04:30:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:33,153 INFO L225 Difference]: With dead ends: 120 [2020-08-19 04:30:33,153 INFO L226 Difference]: Without dead ends: 98 [2020-08-19 04:30:33,154 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 [2020-08-19 04:30:33,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-19 04:30:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-19 04:30:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-19 04:30:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-08-19 04:30:33,159 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-08-19 04:30:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:33,160 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-08-19 04:30:33,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-19 04:30:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-08-19 04:30:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 04:30:33,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:33,161 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] [2020-08-19 04:30:33,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-19 04:30:33,161 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1618980504, now seen corresponding path program 25 times [2020-08-19 04:30:33,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:33,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543479917] [2020-08-19 04:30:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:33,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:33,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:35,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543479917] [2020-08-19 04:30:35,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:35,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-19 04:30:35,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693612162] [2020-08-19 04:30:35,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-19 04:30:35,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-19 04:30:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 04:30:35,308 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 39 states. [2020-08-19 04:30:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:35,656 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-08-19 04:30:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-19 04:30:35,657 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-08-19 04:30:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:35,658 INFO L225 Difference]: With dead ends: 122 [2020-08-19 04:30:35,658 INFO L226 Difference]: Without dead ends: 100 [2020-08-19 04:30:35,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 04:30:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-19 04:30:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-19 04:30:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-19 04:30:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-08-19 04:30:35,664 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-08-19 04:30:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:35,664 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-08-19 04:30:35,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-19 04:30:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-08-19 04:30:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-19 04:30:35,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:35,666 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] [2020-08-19 04:30:35,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-19 04:30:35,666 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:35,666 INFO L82 PathProgramCache]: Analyzing trace with hash -665958294, now seen corresponding path program 26 times [2020-08-19 04:30:35,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:35,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472769033] [2020-08-19 04:30:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:35,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:35,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:37,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472769033] [2020-08-19 04:30:37,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:37,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-19 04:30:37,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871764709] [2020-08-19 04:30:37,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-19 04:30:37,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-19 04:30:37,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-08-19 04:30:37,831 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 40 states. [2020-08-19 04:30:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:38,156 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-08-19 04:30:38,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-19 04:30:38,157 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-08-19 04:30:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:38,158 INFO L225 Difference]: With dead ends: 124 [2020-08-19 04:30:38,158 INFO L226 Difference]: Without dead ends: 102 [2020-08-19 04:30:38,159 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 [2020-08-19 04:30:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-19 04:30:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-19 04:30:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 04:30:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-08-19 04:30:38,166 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-08-19 04:30:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:38,167 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-08-19 04:30:38,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-19 04:30:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-08-19 04:30:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-19 04:30:38,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:38,168 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] [2020-08-19 04:30:38,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-19 04:30:38,168 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash 360351468, now seen corresponding path program 27 times [2020-08-19 04:30:38,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:38,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629705249] [2020-08-19 04:30:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:38,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:38,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:40,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629705249] [2020-08-19 04:30:40,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:40,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-19 04:30:40,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691161440] [2020-08-19 04:30:40,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-19 04:30:40,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-19 04:30:40,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 04:30:40,501 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 41 states. [2020-08-19 04:30:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:40,853 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-08-19 04:30:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-19 04:30:40,854 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-08-19 04:30:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:40,855 INFO L225 Difference]: With dead ends: 126 [2020-08-19 04:30:40,855 INFO L226 Difference]: Without dead ends: 104 [2020-08-19 04:30:40,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-08-19 04:30:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-19 04:30:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-19 04:30:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 04:30:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-08-19 04:30:40,861 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-08-19 04:30:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:40,861 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-08-19 04:30:40,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-19 04:30:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-08-19 04:30:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 04:30:40,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:40,862 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] [2020-08-19 04:30:40,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-19 04:30:40,862 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1198445330, now seen corresponding path program 28 times [2020-08-19 04:30:40,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:40,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595685563] [2020-08-19 04:30:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:40,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:40,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:43,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595685563] [2020-08-19 04:30:43,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:43,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-19 04:30:43,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681189044] [2020-08-19 04:30:43,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-19 04:30:43,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-19 04:30:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 04:30:43,336 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 42 states. [2020-08-19 04:30:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:43,763 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-08-19 04:30:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-19 04:30:43,764 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-08-19 04:30:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:43,765 INFO L225 Difference]: With dead ends: 128 [2020-08-19 04:30:43,765 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 04:30:43,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=1147, Unknown=0, NotChecked=0, Total=1980 [2020-08-19 04:30:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 04:30:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-19 04:30:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-19 04:30:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-08-19 04:30:43,771 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-08-19 04:30:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:43,771 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-08-19 04:30:43,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-19 04:30:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-08-19 04:30:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-19 04:30:43,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:43,772 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] [2020-08-19 04:30:43,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-19 04:30:43,773 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:43,773 INFO L82 PathProgramCache]: Analyzing trace with hash -258581904, now seen corresponding path program 29 times [2020-08-19 04:30:43,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:43,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923266429] [2020-08-19 04:30:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:43,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:43,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:30:46,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923266429] [2020-08-19 04:30:46,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:46,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-19 04:30:46,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936476062] [2020-08-19 04:30:46,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-19 04:30:46,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-19 04:30:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 04:30:46,333 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 43 states. [2020-08-19 04:30:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:46,909 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-08-19 04:30:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-19 04:30:46,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-08-19 04:30:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:46,911 INFO L225 Difference]: With dead ends: 130 [2020-08-19 04:30:46,911 INFO L226 Difference]: Without dead ends: 108 [2020-08-19 04:30:46,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=874, Invalid=1196, Unknown=0, NotChecked=0, Total=2070 [2020-08-19 04:30:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-19 04:30:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-19 04:30:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 04:30:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-08-19 04:30:46,921 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-08-19 04:30:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:46,922 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-08-19 04:30:46,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-19 04:30:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-08-19 04:30:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-19 04:30:46,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:46,924 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] [2020-08-19 04:30:46,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-19 04:30:46,925 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1007038322, now seen corresponding path program 30 times [2020-08-19 04:30:46,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:46,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557946025] [2020-08-19 04:30:46,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:47,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:47,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:30:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat