/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:46:12,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:46:12,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:46:12,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:46:12,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:46:12,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:46:12,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:46:12,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:46:12,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:46:12,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:46:12,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:46:12,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:46:12,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:46:12,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:46:12,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:46:12,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:46:12,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:46:12,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:46:12,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:46:12,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:46:12,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:46:12,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:46:12,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:46:12,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:46:12,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:46:12,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:46:12,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:46:12,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:46:12,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:46:12,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:46:12,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:46:12,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:46:12,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:46:12,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:46:12,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:46:12,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:46:12,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:46:12,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:46:12,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:46:12,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:46:12,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:46:12,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 04:46:12,827 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:46:12,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:46:12,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:46:12,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:46:12,829 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:46:12,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:46:12,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:46:12,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:46:12,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:46:12,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:46:12,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:46:12,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:46:12,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:46:12,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:46:12,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:46:12,831 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:46:12,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:46:12,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:46:12,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:46:12,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:46:12,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:46:12,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:12,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:46:12,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:46:12,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:46:12,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:46:12,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:46:12,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:46:12,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:46:12,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:46:13,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:46:13,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:46:13,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:46:13,191 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:46:13,191 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:46:13,192 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-22 04:46:13,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec6d0a634/e5bc0bb4e35542ba9aec88076633d273/FLAG8c340f9c5 [2020-08-22 04:46:13,770 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:46:13,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-22 04:46:13,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec6d0a634/e5bc0bb4e35542ba9aec88076633d273/FLAG8c340f9c5 [2020-08-22 04:46:14,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec6d0a634/e5bc0bb4e35542ba9aec88076633d273 [2020-08-22 04:46:14,127 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:46:14,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:46:14,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:14,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:46:14,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:46:14,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187bf361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14, skipping insertion in model container [2020-08-22 04:46:14,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:46:14,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:46:14,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:14,379 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:46:14,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:14,415 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:46:14,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14 WrapperNode [2020-08-22 04:46:14,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:14,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:46:14,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:46:14,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:46:14,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:46:14,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:46:14,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:46:14,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:46:14,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:14,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:46:14,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:46:14,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 04:46:14,606 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-22 04:46:14,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:46:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:46:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 04:46:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 04:46:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-08-22 04:46:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 04:46:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 04:46:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 04:46:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:46:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 04:46:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 04:46:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 04:46:14,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:46:14,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:46:14,869 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:46:14,869 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 04:46:14,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:14 BoogieIcfgContainer [2020-08-22 04:46:14,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:46:14,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:46:14,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:46:14,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:46:14,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:46:14" (1/3) ... [2020-08-22 04:46:14,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f485630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:14, skipping insertion in model container [2020-08-22 04:46:14,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (2/3) ... [2020-08-22 04:46:14,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f485630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:14, skipping insertion in model container [2020-08-22 04:46:14,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:14" (3/3) ... [2020-08-22 04:46:14,885 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-08-22 04:46:14,900 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:46:14,909 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:46:14,929 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:46:14,975 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:46:14,975 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:46:14,975 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:46:14,975 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:46:14,975 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:46:14,976 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:46:14,979 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:46:14,979 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:46:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 04:46:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:46:15,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:15,018 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-08-22 04:46:15,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262505050] [2020-08-22 04:46:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:15,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262505050] [2020-08-22 04:46:15,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:15,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:46:15,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606435090] [2020-08-22 04:46:15,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:46:15,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:15,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:46:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:46:15,291 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-08-22 04:46:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:15,461 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-08-22 04:46:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:46:15,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-22 04:46:15,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:15,475 INFO L225 Difference]: With dead ends: 59 [2020-08-22 04:46:15,475 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 04:46:15,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 04:46:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-22 04:46:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 04:46:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 04:46:15,517 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-08-22 04:46:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:15,517 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 04:46:15,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:46:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 04:46:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:46:15,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:15,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:46:15,520 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-08-22 04:46:15,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492251090] [2020-08-22 04:46:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:15,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492251090] [2020-08-22 04:46:15,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:15,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 04:46:15,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715403444] [2020-08-22 04:46:15,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:46:15,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:15,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:46:15,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:15,732 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-22 04:46:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:15,925 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-22 04:46:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:46:15,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 04:46:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:15,927 INFO L225 Difference]: With dead ends: 48 [2020-08-22 04:46:15,927 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 04:46:15,929 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 [2020-08-22 04:46:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 04:46:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-22 04:46:15,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 04:46:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-22 04:46:15,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-22 04:46:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:15,939 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-22 04:46:15,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:46:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-22 04:46:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:46:15,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:15,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:46:15,941 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-08-22 04:46:15,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590858051] [2020-08-22 04:46:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:16,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590858051] [2020-08-22 04:46:16,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:16,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:46:16,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251759005] [2020-08-22 04:46:16,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:46:16,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:16,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:46:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:16,156 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-22 04:46:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:16,452 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-22 04:46:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:46:16,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 04:46:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:16,453 INFO L225 Difference]: With dead ends: 50 [2020-08-22 04:46:16,454 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 04:46:16,454 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 [2020-08-22 04:46:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 04:46:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-22 04:46:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 04:46:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 04:46:16,467 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 04:46:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:16,467 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 04:46:16,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:46:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 04:46:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:46:16,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:16,471 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:16,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:46:16,472 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:16,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2059999690, now seen corresponding path program 2 times [2020-08-22 04:46:16,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:16,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378700717] [2020-08-22 04:46:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:16,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378700717] [2020-08-22 04:46:16,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:16,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:46:16,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248959651] [2020-08-22 04:46:16,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:46:16,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:16,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:46:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:46:16,741 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-22 04:46:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:16,907 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-08-22 04:46:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:46:16,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-22 04:46:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:16,909 INFO L225 Difference]: With dead ends: 52 [2020-08-22 04:46:16,909 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 04:46:16,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:46:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 04:46:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 04:46:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 04:46:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 04:46:16,917 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-22 04:46:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:16,917 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 04:46:16,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:46:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 04:46:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:46:16,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:16,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:16,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:46:16,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:16,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1428164148, now seen corresponding path program 3 times [2020-08-22 04:46:16,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:16,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054604126] [2020-08-22 04:46:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:17,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054604126] [2020-08-22 04:46:17,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:17,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 04:46:17,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611644080] [2020-08-22 04:46:17,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 04:46:17,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:17,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 04:46:17,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:46:17,173 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-22 04:46:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:17,381 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-08-22 04:46:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:46:17,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 04:46:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:17,382 INFO L225 Difference]: With dead ends: 54 [2020-08-22 04:46:17,382 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 04:46:17,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:46:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 04:46:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-22 04:46:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 04:46:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 04:46:17,397 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-22 04:46:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:17,399 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 04:46:17,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 04:46:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 04:46:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 04:46:17,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:17,400 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:17,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:46:17,401 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:17,405 INFO L82 PathProgramCache]: Analyzing trace with hash 815845710, now seen corresponding path program 4 times [2020-08-22 04:46:17,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:17,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086647625] [2020-08-22 04:46:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:17,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086647625] [2020-08-22 04:46:17,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:17,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:46:17,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587439672] [2020-08-22 04:46:17,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:46:17,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:17,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:46:17,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:46:17,738 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-22 04:46:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:17,939 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-22 04:46:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 04:46:17,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 04:46:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:17,940 INFO L225 Difference]: With dead ends: 56 [2020-08-22 04:46:17,940 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 04:46:17,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:46:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 04:46:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 04:46:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 04:46:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-22 04:46:17,953 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-22 04:46:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:17,953 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-22 04:46:17,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:46:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-22 04:46:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 04:46:17,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:17,957 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:17,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:46:17,957 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1235736656, now seen corresponding path program 5 times [2020-08-22 04:46:17,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:17,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749496602] [2020-08-22 04:46:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:18,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749496602] [2020-08-22 04:46:18,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:18,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:46:18,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207317937] [2020-08-22 04:46:18,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:46:18,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:18,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:46:18,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:46:18,244 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-22 04:46:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:18,431 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-22 04:46:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:46:18,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-22 04:46:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:18,432 INFO L225 Difference]: With dead ends: 58 [2020-08-22 04:46:18,432 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 04:46:18,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:46:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 04:46:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-22 04:46:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 04:46:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-22 04:46:18,439 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-22 04:46:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:18,439 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-22 04:46:18,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:46:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-22 04:46:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 04:46:18,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:18,441 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:18,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:46:18,441 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:18,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1024009938, now seen corresponding path program 6 times [2020-08-22 04:46:18,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:18,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864112584] [2020-08-22 04:46:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:18,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864112584] [2020-08-22 04:46:18,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:18,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 04:46:18,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447178919] [2020-08-22 04:46:18,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 04:46:18,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:18,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 04:46:18,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:46:18,725 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-22 04:46:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:18,958 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-22 04:46:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:46:18,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-22 04:46:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:18,960 INFO L225 Difference]: With dead ends: 60 [2020-08-22 04:46:18,960 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 04:46:18,961 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 [2020-08-22 04:46:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 04:46:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 04:46:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 04:46:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-22 04:46:18,967 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-22 04:46:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:18,968 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-22 04:46:18,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 04:46:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-22 04:46:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 04:46:18,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:18,969 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:18,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:46:18,969 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -581903148, now seen corresponding path program 7 times [2020-08-22 04:46:18,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:18,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745936954] [2020-08-22 04:46:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:19,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745936954] [2020-08-22 04:46:19,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:19,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 04:46:19,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152351801] [2020-08-22 04:46:19,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 04:46:19,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:19,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 04:46:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:46:19,308 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-08-22 04:46:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:19,517 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 04:46:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 04:46:19,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-08-22 04:46:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:19,519 INFO L225 Difference]: With dead ends: 62 [2020-08-22 04:46:19,519 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 04:46:19,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:46:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 04:46:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-22 04:46:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 04:46:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-22 04:46:19,525 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-08-22 04:46:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:19,526 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-22 04:46:19,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 04:46:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-22 04:46:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 04:46:19,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:19,527 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:19,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:46:19,528 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1971119530, now seen corresponding path program 8 times [2020-08-22 04:46:19,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:19,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095963179] [2020-08-22 04:46:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:19,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095963179] [2020-08-22 04:46:19,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:19,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:46:19,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528714439] [2020-08-22 04:46:19,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:46:19,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:46:19,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:46:19,932 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-08-22 04:46:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:20,147 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-22 04:46:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 04:46:20,147 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-22 04:46:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:20,148 INFO L225 Difference]: With dead ends: 64 [2020-08-22 04:46:20,148 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 04:46:20,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:46:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 04:46:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-22 04:46:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 04:46:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-22 04:46:20,156 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-08-22 04:46:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:20,156 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-22 04:46:20,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:46:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-22 04:46:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 04:46:20,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:20,158 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:20,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:46:20,158 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1273233576, now seen corresponding path program 9 times [2020-08-22 04:46:20,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:20,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539470869] [2020-08-22 04:46:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 04:46:20,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539470869] [2020-08-22 04:46:20,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:20,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:46:20,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869264610] [2020-08-22 04:46:20,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:20,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:20,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:20,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:20,231 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-08-22 04:46:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:20,332 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-08-22 04:46:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:46:20,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-22 04:46:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:20,335 INFO L225 Difference]: With dead ends: 65 [2020-08-22 04:46:20,335 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 04:46:20,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 04:46:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-08-22 04:46:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 04:46:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-22 04:46:20,346 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-08-22 04:46:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:20,346 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-22 04:46:20,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-22 04:46:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 04:46:20,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:20,347 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:20,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:46:20,348 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1053921041, now seen corresponding path program 1 times [2020-08-22 04:46:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:20,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424710225] [2020-08-22 04:46:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 04:46:20,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424710225] [2020-08-22 04:46:20,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:20,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:46:20,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649713374] [2020-08-22 04:46:20,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:46:20,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:46:20,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:20,448 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-22 04:46:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:20,551 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-08-22 04:46:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:46:20,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-22 04:46:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:20,552 INFO L225 Difference]: With dead ends: 73 [2020-08-22 04:46:20,553 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 04:46:20,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 04:46:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-08-22 04:46:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 04:46:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-08-22 04:46:20,559 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 41 [2020-08-22 04:46:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:20,560 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-08-22 04:46:20,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:46:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-08-22 04:46:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 04:46:20,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:20,561 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:20,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:46:20,561 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:20,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:20,562 INFO L82 PathProgramCache]: Analyzing trace with hash -159448072, now seen corresponding path program 2 times [2020-08-22 04:46:20,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:20,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058570823] [2020-08-22 04:46:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-22 04:46:20,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058570823] [2020-08-22 04:46:20,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:20,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:46:20,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904460866] [2020-08-22 04:46:20,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:20,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:20,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:20,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:20,626 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-08-22 04:46:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:20,703 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-08-22 04:46:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:46:20,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-22 04:46:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:20,705 INFO L225 Difference]: With dead ends: 69 [2020-08-22 04:46:20,705 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 04:46:20,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:20,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 04:46:20,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-22 04:46:20,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 04:46:20,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-08-22 04:46:20,712 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-08-22 04:46:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:20,712 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-08-22 04:46:20,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:20,713 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-08-22 04:46:20,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 04:46:20,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:20,713 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:20,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:46:20,714 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:20,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1139281096, now seen corresponding path program 1 times [2020-08-22 04:46:20,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:20,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024291153] [2020-08-22 04:46:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:21,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024291153] [2020-08-22 04:46:21,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:21,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 04:46:21,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059673467] [2020-08-22 04:46:21,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 04:46:21,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:21,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 04:46:21,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:46:21,111 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2020-08-22 04:46:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:21,321 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-08-22 04:46:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:46:21,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-08-22 04:46:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:21,323 INFO L225 Difference]: With dead ends: 74 [2020-08-22 04:46:21,323 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 04:46:21,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-08-22 04:46:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 04:46:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-22 04:46:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 04:46:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-22 04:46:21,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-08-22 04:46:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:21,334 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-22 04:46:21,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 04:46:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-22 04:46:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 04:46:21,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:21,349 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:21,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:46:21,349 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash 763672122, now seen corresponding path program 2 times [2020-08-22 04:46:21,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:21,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573353590] [2020-08-22 04:46:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:21,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573353590] [2020-08-22 04:46:21,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:21,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 04:46:21,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903750006] [2020-08-22 04:46:21,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 04:46:21,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 04:46:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:46:21,892 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-08-22 04:46:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:22,103 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-08-22 04:46:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 04:46:22,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-22 04:46:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:22,105 INFO L225 Difference]: With dead ends: 76 [2020-08-22 04:46:22,105 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 04:46:22,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-08-22 04:46:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 04:46:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-22 04:46:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 04:46:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-08-22 04:46:22,116 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-08-22 04:46:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:22,116 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-08-22 04:46:22,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 04:46:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-08-22 04:46:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 04:46:22,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:22,119 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:22,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:46:22,120 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash -154353476, now seen corresponding path program 3 times [2020-08-22 04:46:22,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:22,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873703443] [2020-08-22 04:46:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:22,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873703443] [2020-08-22 04:46:22,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:22,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 04:46:22,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014642344] [2020-08-22 04:46:22,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 04:46:22,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 04:46:22,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:46:22,725 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-08-22 04:46:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:22,942 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-08-22 04:46:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 04:46:22,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-08-22 04:46:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:22,943 INFO L225 Difference]: With dead ends: 78 [2020-08-22 04:46:22,943 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 04:46:22,944 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 [2020-08-22 04:46:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 04:46:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-22 04:46:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 04:46:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-22 04:46:22,949 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-08-22 04:46:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:22,950 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-22 04:46:22,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 04:46:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-22 04:46:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 04:46:22,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:22,951 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:22,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:46:22,951 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:22,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1908657474, now seen corresponding path program 4 times [2020-08-22 04:46:22,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:22,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850627501] [2020-08-22 04:46:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:23,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850627501] [2020-08-22 04:46:23,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:23,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 04:46:23,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452702573] [2020-08-22 04:46:23,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 04:46:23,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:23,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 04:46:23,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-08-22 04:46:23,463 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-08-22 04:46:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:23,712 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-22 04:46:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 04:46:23,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-22 04:46:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:23,713 INFO L225 Difference]: With dead ends: 80 [2020-08-22 04:46:23,713 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 04:46:23,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-08-22 04:46:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 04:46:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-22 04:46:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 04:46:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-22 04:46:23,726 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-08-22 04:46:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:23,727 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-22 04:46:23,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 04:46:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-22 04:46:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 04:46:23,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:23,728 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:23,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 04:46:23,729 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash 127347776, now seen corresponding path program 5 times [2020-08-22 04:46:23,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:23,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135950822] [2020-08-22 04:46:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:23,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:23,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:24,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135950822] [2020-08-22 04:46:24,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:24,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 04:46:24,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188851500] [2020-08-22 04:46:24,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 04:46:24,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:24,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 04:46:24,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-08-22 04:46:24,402 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 19 states. [2020-08-22 04:46:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:24,651 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-08-22 04:46:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 04:46:24,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-08-22 04:46:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:24,652 INFO L225 Difference]: With dead ends: 82 [2020-08-22 04:46:24,652 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 04:46:24,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:46:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 04:46:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-22 04:46:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 04:46:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-22 04:46:24,660 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-08-22 04:46:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:24,660 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-22 04:46:24,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 04:46:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-22 04:46:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 04:46:24,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:24,661 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:24,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 04:46:24,662 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:24,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1776693950, now seen corresponding path program 6 times [2020-08-22 04:46:24,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:24,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402349649] [2020-08-22 04:46:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:25,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402349649] [2020-08-22 04:46:25,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:25,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 04:46:25,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109930411] [2020-08-22 04:46:25,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 04:46:25,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 04:46:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-08-22 04:46:25,291 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-08-22 04:46:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:25,577 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-08-22 04:46:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 04:46:25,581 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-08-22 04:46:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:25,582 INFO L225 Difference]: With dead ends: 84 [2020-08-22 04:46:25,582 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 04:46:25,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-08-22 04:46:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 04:46:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-22 04:46:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 04:46:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-08-22 04:46:25,589 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-08-22 04:46:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:25,589 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-08-22 04:46:25,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 04:46:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-08-22 04:46:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 04:46:25,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:25,590 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:25,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 04:46:25,591 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:25,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1904724540, now seen corresponding path program 7 times [2020-08-22 04:46:25,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:25,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634946679] [2020-08-22 04:46:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:26,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634946679] [2020-08-22 04:46:26,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:26,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 04:46:26,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783548846] [2020-08-22 04:46:26,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 04:46:26,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:26,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 04:46:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-22 04:46:26,348 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 21 states. [2020-08-22 04:46:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:26,600 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-08-22 04:46:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 04:46:26,601 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-08-22 04:46:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:26,602 INFO L225 Difference]: With dead ends: 86 [2020-08-22 04:46:26,602 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 04:46:26,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2020-08-22 04:46:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 04:46:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-22 04:46:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 04:46:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-08-22 04:46:26,608 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-08-22 04:46:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:26,609 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-08-22 04:46:26,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 04:46:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-08-22 04:46:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 04:46:26,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:26,610 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:26,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 04:46:26,610 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:26,611 INFO L82 PathProgramCache]: Analyzing trace with hash -388069946, now seen corresponding path program 8 times [2020-08-22 04:46:26,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:26,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746823761] [2020-08-22 04:46:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:27,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746823761] [2020-08-22 04:46:27,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:27,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 04:46:27,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948295183] [2020-08-22 04:46:27,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 04:46:27,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:27,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 04:46:27,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:46:27,389 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-08-22 04:46:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:27,688 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-08-22 04:46:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 04:46:27,688 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-22 04:46:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:27,690 INFO L225 Difference]: With dead ends: 88 [2020-08-22 04:46:27,690 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 04:46:27,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-08-22 04:46:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 04:46:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-22 04:46:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 04:46:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-08-22 04:46:27,695 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-08-22 04:46:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:27,695 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-08-22 04:46:27,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 04:46:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-08-22 04:46:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 04:46:27,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:27,696 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:27,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 04:46:27,696 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1123081544, now seen corresponding path program 9 times [2020-08-22 04:46:27,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:27,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950116321] [2020-08-22 04:46:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:27,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:27,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:28,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950116321] [2020-08-22 04:46:28,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:28,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 04:46:28,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871592173] [2020-08-22 04:46:28,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 04:46:28,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:28,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 04:46:28,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-08-22 04:46:28,529 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2020-08-22 04:46:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:28,817 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-08-22 04:46:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 04:46:28,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-08-22 04:46:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:28,821 INFO L225 Difference]: With dead ends: 90 [2020-08-22 04:46:28,821 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 04:46:28,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2020-08-22 04:46:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 04:46:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-22 04:46:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 04:46:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-08-22 04:46:28,826 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-08-22 04:46:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:28,826 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-08-22 04:46:28,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 04:46:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-08-22 04:46:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 04:46:28,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:28,827 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:28,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 04:46:28,828 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:28,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1640717386, now seen corresponding path program 10 times [2020-08-22 04:46:28,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:28,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898921154] [2020-08-22 04:46:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:29,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898921154] [2020-08-22 04:46:29,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:29,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 04:46:29,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196352461] [2020-08-22 04:46:29,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 04:46:29,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:29,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 04:46:29,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-08-22 04:46:29,901 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-08-22 04:46:30,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:30,192 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-08-22 04:46:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 04:46:30,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-08-22 04:46:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:30,193 INFO L225 Difference]: With dead ends: 92 [2020-08-22 04:46:30,193 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 04:46:30,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=436, Unknown=0, NotChecked=0, Total=702 [2020-08-22 04:46:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 04:46:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-22 04:46:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 04:46:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-08-22 04:46:30,200 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-08-22 04:46:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:30,200 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-08-22 04:46:30,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 04:46:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-08-22 04:46:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 04:46:30,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:30,201 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:30,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 04:46:30,202 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:30,202 INFO L82 PathProgramCache]: Analyzing trace with hash 872555212, now seen corresponding path program 11 times [2020-08-22 04:46:30,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:30,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675613158] [2020-08-22 04:46:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:30,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:30,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:31,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675613158] [2020-08-22 04:46:31,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:31,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 04:46:31,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733684139] [2020-08-22 04:46:31,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 04:46:31,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:31,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 04:46:31,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-08-22 04:46:31,098 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 25 states. [2020-08-22 04:46:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:31,421 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-08-22 04:46:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 04:46:31,421 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-08-22 04:46:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:31,422 INFO L225 Difference]: With dead ends: 94 [2020-08-22 04:46:31,422 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 04:46:31,423 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 [2020-08-22 04:46:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 04:46:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-22 04:46:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 04:46:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-08-22 04:46:31,428 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-08-22 04:46:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:31,428 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-08-22 04:46:31,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 04:46:31,428 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-08-22 04:46:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 04:46:31,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:31,429 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:31,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 04:46:31,433 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:31,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1403080910, now seen corresponding path program 12 times [2020-08-22 04:46:31,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:31,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881424067] [2020-08-22 04:46:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:31,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:31,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:32,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881424067] [2020-08-22 04:46:32,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:32,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 04:46:32,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393719378] [2020-08-22 04:46:32,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 04:46:32,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:32,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 04:46:32,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-22 04:46:32,497 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-08-22 04:46:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:32,847 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-08-22 04:46:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 04:46:32,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-08-22 04:46:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:32,850 INFO L225 Difference]: With dead ends: 96 [2020-08-22 04:46:32,850 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 04:46:32,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2020-08-22 04:46:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 04:46:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-22 04:46:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 04:46:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-08-22 04:46:32,855 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-08-22 04:46:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:32,856 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-08-22 04:46:32,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 04:46:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-08-22 04:46:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 04:46:32,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:32,857 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:32,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 04:46:32,857 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:32,857 INFO L82 PathProgramCache]: Analyzing trace with hash 137168464, now seen corresponding path program 13 times [2020-08-22 04:46:32,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:32,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008462871] [2020-08-22 04:46:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:32,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:32,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:34,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008462871] [2020-08-22 04:46:34,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:34,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 04:46:34,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662304761] [2020-08-22 04:46:34,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 04:46:34,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 04:46:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-08-22 04:46:34,165 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 27 states. [2020-08-22 04:46:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:34,384 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-08-22 04:46:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 04:46:34,384 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-08-22 04:46:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:34,385 INFO L225 Difference]: With dead ends: 98 [2020-08-22 04:46:34,385 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 04:46:34,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-08-22 04:46:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 04:46:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 04:46:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 04:46:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-08-22 04:46:34,391 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-08-22 04:46:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:34,391 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-08-22 04:46:34,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 04:46:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-08-22 04:46:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 04:46:34,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:34,392 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:34,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 04:46:34,393 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash -928947374, now seen corresponding path program 14 times [2020-08-22 04:46:34,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:34,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914311696] [2020-08-22 04:46:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:34,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:34,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:35,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914311696] [2020-08-22 04:46:35,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:35,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 04:46:35,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398009429] [2020-08-22 04:46:35,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 04:46:35,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 04:46:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-08-22 04:46:35,561 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-08-22 04:46:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:35,876 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-08-22 04:46:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 04:46:35,877 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-08-22 04:46:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:35,878 INFO L225 Difference]: With dead ends: 100 [2020-08-22 04:46:35,878 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 04:46:35,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2020-08-22 04:46:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 04:46:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-22 04:46:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 04:46:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-08-22 04:46:35,884 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-08-22 04:46:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:35,885 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-08-22 04:46:35,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 04:46:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-08-22 04:46:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 04:46:35,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:35,886 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:35,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 04:46:35,886 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:35,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1030916052, now seen corresponding path program 15 times [2020-08-22 04:46:35,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:35,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408237826] [2020-08-22 04:46:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:35,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:35,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:37,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408237826] [2020-08-22 04:46:37,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:37,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 04:46:37,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192409858] [2020-08-22 04:46:37,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 04:46:37,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:37,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 04:46:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-08-22 04:46:37,112 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 29 states. [2020-08-22 04:46:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:37,424 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-08-22 04:46:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 04:46:37,424 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-08-22 04:46:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:37,425 INFO L225 Difference]: With dead ends: 102 [2020-08-22 04:46:37,425 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 04:46:37,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-08-22 04:46:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 04:46:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-22 04:46:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 04:46:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-22 04:46:37,431 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-08-22 04:46:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:37,431 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-22 04:46:37,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 04:46:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-22 04:46:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 04:46:37,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:37,432 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:37,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 04:46:37,432 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:37,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1030974506, now seen corresponding path program 16 times [2020-08-22 04:46:37,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:37,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059909704] [2020-08-22 04:46:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:38,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059909704] [2020-08-22 04:46:38,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:38,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 04:46:38,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331451609] [2020-08-22 04:46:38,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 04:46:38,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:38,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 04:46:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-08-22 04:46:38,768 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-08-22 04:46:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:39,071 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-08-22 04:46:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 04:46:39,071 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-08-22 04:46:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:39,072 INFO L225 Difference]: With dead ends: 104 [2020-08-22 04:46:39,072 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 04:46:39,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 04:46:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 04:46:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-22 04:46:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 04:46:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-08-22 04:46:39,077 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-08-22 04:46:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:39,077 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-08-22 04:46:39,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 04:46:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-08-22 04:46:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 04:46:39,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:39,078 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:39,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 04:46:39,079 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1767090008, now seen corresponding path program 17 times [2020-08-22 04:46:39,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:39,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569443282] [2020-08-22 04:46:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:39,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:39,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:40,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569443282] [2020-08-22 04:46:40,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:40,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 04:46:40,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059859011] [2020-08-22 04:46:40,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 04:46:40,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:40,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 04:46:40,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-22 04:46:40,494 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 31 states. [2020-08-22 04:46:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:40,912 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-08-22 04:46:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 04:46:40,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-08-22 04:46:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:40,913 INFO L225 Difference]: With dead ends: 106 [2020-08-22 04:46:40,914 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 04:46:40,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 04:46:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 04:46:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-22 04:46:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 04:46:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-08-22 04:46:40,919 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-08-22 04:46:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:40,920 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-08-22 04:46:40,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 04:46:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-08-22 04:46:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 04:46:40,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:40,921 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:40,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 04:46:40,921 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:40,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2057560666, now seen corresponding path program 18 times [2020-08-22 04:46:40,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:40,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963018043] [2020-08-22 04:46:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:42,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963018043] [2020-08-22 04:46:42,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:42,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 04:46:42,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429331915] [2020-08-22 04:46:42,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 04:46:42,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 04:46:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-08-22 04:46:42,366 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-08-22 04:46:42,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:42,806 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-08-22 04:46:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 04:46:42,806 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-08-22 04:46:42,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:42,808 INFO L225 Difference]: With dead ends: 108 [2020-08-22 04:46:42,808 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 04:46:42,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 04:46:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 04:46:42,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-22 04:46:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 04:46:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-08-22 04:46:42,815 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-08-22 04:46:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:42,815 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-08-22 04:46:42,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 04:46:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-08-22 04:46:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 04:46:42,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:42,816 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:42,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 04:46:42,816 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2026988764, now seen corresponding path program 19 times [2020-08-22 04:46:42,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:42,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056562775] [2020-08-22 04:46:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:44,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056562775] [2020-08-22 04:46:44,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:44,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 04:46:44,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595914524] [2020-08-22 04:46:44,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 04:46:44,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:44,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 04:46:44,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 04:46:44,280 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 33 states. [2020-08-22 04:46:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:44,697 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-08-22 04:46:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 04:46:44,698 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-08-22 04:46:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:44,699 INFO L225 Difference]: With dead ends: 110 [2020-08-22 04:46:44,699 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 04:46:44,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 04:46:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 04:46:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-22 04:46:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 04:46:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-08-22 04:46:44,706 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-08-22 04:46:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:44,706 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-08-22 04:46:44,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 04:46:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-08-22 04:46:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 04:46:44,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:44,708 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:44,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 04:46:44,708 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1582805282, now seen corresponding path program 20 times [2020-08-22 04:46:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:44,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890725192] [2020-08-22 04:46:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:44,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:46,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890725192] [2020-08-22 04:46:46,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:46,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 04:46:46,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884244183] [2020-08-22 04:46:46,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 04:46:46,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:46,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 04:46:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 04:46:46,257 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-08-22 04:46:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:46,669 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-08-22 04:46:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 04:46:46,669 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-08-22 04:46:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:46,670 INFO L225 Difference]: With dead ends: 112 [2020-08-22 04:46:46,670 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 04:46:46,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 04:46:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 04:46:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-22 04:46:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 04:46:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-08-22 04:46:46,676 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-08-22 04:46:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:46,677 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-08-22 04:46:46,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 04:46:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-08-22 04:46:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 04:46:46,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:46,678 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:46,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 04:46:46,678 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:46,678 INFO L82 PathProgramCache]: Analyzing trace with hash -261308320, now seen corresponding path program 21 times [2020-08-22 04:46:46,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:46,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683184110] [2020-08-22 04:46:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:46,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:46,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:48,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683184110] [2020-08-22 04:46:48,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:48,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 04:46:48,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637279365] [2020-08-22 04:46:48,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 04:46:48,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 04:46:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 04:46:48,302 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 35 states. [2020-08-22 04:46:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:48,713 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-08-22 04:46:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 04:46:48,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-08-22 04:46:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:48,715 INFO L225 Difference]: With dead ends: 114 [2020-08-22 04:46:48,715 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 04:46:48,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 04:46:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 04:46:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-22 04:46:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 04:46:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-08-22 04:46:48,726 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-08-22 04:46:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:48,727 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-08-22 04:46:48,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 04:46:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-08-22 04:46:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 04:46:48,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:48,729 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:48,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 04:46:48,729 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047454, now seen corresponding path program 22 times [2020-08-22 04:46:48,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:48,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860751442] [2020-08-22 04:46:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:48,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:48,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:50,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860751442] [2020-08-22 04:46:50,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:50,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 04:46:50,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046856929] [2020-08-22 04:46:50,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 04:46:50,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 04:46:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 04:46:50,499 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-08-22 04:46:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:50,862 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-08-22 04:46:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 04:46:50,862 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-08-22 04:46:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:50,863 INFO L225 Difference]: With dead ends: 116 [2020-08-22 04:46:50,864 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 04:46:50,865 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 [2020-08-22 04:46:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 04:46:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-22 04:46:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 04:46:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-08-22 04:46:50,870 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-08-22 04:46:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:50,871 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-08-22 04:46:50,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 04:46:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-08-22 04:46:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 04:46:50,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:50,871 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:50,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 04:46:50,872 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:50,872 INFO L82 PathProgramCache]: Analyzing trace with hash 740735460, now seen corresponding path program 23 times [2020-08-22 04:46:50,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:50,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81926323] [2020-08-22 04:46:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:52,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81926323] [2020-08-22 04:46:52,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:52,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 04:46:52,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527980388] [2020-08-22 04:46:52,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 04:46:52,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:52,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 04:46:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 04:46:52,742 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 37 states. [2020-08-22 04:46:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:53,253 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-08-22 04:46:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 04:46:53,254 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-08-22 04:46:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:53,255 INFO L225 Difference]: With dead ends: 118 [2020-08-22 04:46:53,255 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 04:46:53,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=643, Invalid=917, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 04:46:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 04:46:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-22 04:46:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 04:46:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-08-22 04:46:53,263 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-08-22 04:46:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:53,263 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-08-22 04:46:53,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 04:46:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-08-22 04:46:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 04:46:53,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:53,264 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:53,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 04:46:53,265 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -721649178, now seen corresponding path program 24 times [2020-08-22 04:46:53,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:53,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322602783] [2020-08-22 04:46:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:53,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:53,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:55,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322602783] [2020-08-22 04:46:55,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:55,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 04:46:55,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010677553] [2020-08-22 04:46:55,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 04:46:55,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:55,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 04:46:55,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 04:46:55,222 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-08-22 04:46:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:55,673 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-08-22 04:46:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 04:46:55,674 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-08-22 04:46:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:55,675 INFO L225 Difference]: With dead ends: 120 [2020-08-22 04:46:55,675 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 04:46:55,677 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 [2020-08-22 04:46:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 04:46:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-22 04:46:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 04:46:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-08-22 04:46:55,682 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-08-22 04:46:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:55,682 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-08-22 04:46:55,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 04:46:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-08-22 04:46:55,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 04:46:55,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:55,683 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:55,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 04:46:55,684 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:55,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1618980504, now seen corresponding path program 25 times [2020-08-22 04:46:55,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:55,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674040401] [2020-08-22 04:46:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:55,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:57,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674040401] [2020-08-22 04:46:57,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:57,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 04:46:57,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081355097] [2020-08-22 04:46:57,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 04:46:57,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 04:46:57,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 04:46:57,788 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 39 states. [2020-08-22 04:46:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:58,142 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-08-22 04:46:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 04:46:58,143 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-08-22 04:46:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:58,144 INFO L225 Difference]: With dead ends: 122 [2020-08-22 04:46:58,144 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 04:46:58,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 04:46:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 04:46:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-22 04:46:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 04:46:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-08-22 04:46:58,150 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-08-22 04:46:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:58,150 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-08-22 04:46:58,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 04:46:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-08-22 04:46:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 04:46:58,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:58,151 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:58,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 04:46:58,152 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:58,152 INFO L82 PathProgramCache]: Analyzing trace with hash -665958294, now seen corresponding path program 26 times [2020-08-22 04:46:58,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:58,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226554199] [2020-08-22 04:46:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:58,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:58,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:47:00,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226554199] [2020-08-22 04:47:00,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:00,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 04:47:00,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675188465] [2020-08-22 04:47:00,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 04:47:00,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:00,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 04:47:00,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 04:47:00,297 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 40 states. [2020-08-22 04:47:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:00,632 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-08-22 04:47:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 04:47:00,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-08-22 04:47:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:00,634 INFO L225 Difference]: With dead ends: 124 [2020-08-22 04:47:00,634 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 04:47:00,635 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 [2020-08-22 04:47:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 04:47:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-22 04:47:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 04:47:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-08-22 04:47:00,640 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-08-22 04:47:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:00,641 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-08-22 04:47:00,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 04:47:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-08-22 04:47:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 04:47:00,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:00,642 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:00,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 04:47:00,642 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash 360351468, now seen corresponding path program 27 times [2020-08-22 04:47:00,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:00,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320727369] [2020-08-22 04:47:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:00,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:47:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:47:02,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320727369] [2020-08-22 04:47:02,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:02,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 04:47:02,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335611839] [2020-08-22 04:47:02,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 04:47:02,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:02,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 04:47:02,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 04:47:02,926 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 41 states. [2020-08-22 04:47:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:03,324 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-08-22 04:47:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 04:47:03,325 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-08-22 04:47:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:03,326 INFO L225 Difference]: With dead ends: 126 [2020-08-22 04:47:03,326 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 04:47:03,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 04:47:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 04:47:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-22 04:47:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 04:47:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-08-22 04:47:03,331 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-08-22 04:47:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:03,332 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-08-22 04:47:03,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 04:47:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-08-22 04:47:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 04:47:03,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:03,332 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:03,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 04:47:03,332 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:03,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1198445330, now seen corresponding path program 28 times [2020-08-22 04:47:03,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:03,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130890629] [2020-08-22 04:47:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:03,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:03,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:47:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:47:05,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130890629] [2020-08-22 04:47:05,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:05,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 04:47:05,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542283209] [2020-08-22 04:47:05,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 04:47:05,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:05,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 04:47:05,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 04:47:05,722 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 42 states. [2020-08-22 04:47:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:06,147 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-08-22 04:47:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 04:47:06,148 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-08-22 04:47:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:06,149 INFO L225 Difference]: With dead ends: 128 [2020-08-22 04:47:06,149 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 04:47:06,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=1147, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 04:47:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 04:47:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-22 04:47:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 04:47:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-08-22 04:47:06,155 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-08-22 04:47:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:06,155 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-08-22 04:47:06,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 04:47:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-08-22 04:47:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 04:47:06,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:06,156 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:06,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 04:47:06,157 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash -258581904, now seen corresponding path program 29 times [2020-08-22 04:47:06,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:06,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846623076] [2020-08-22 04:47:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:06,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:06,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:47:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:47:08,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846623076] [2020-08-22 04:47:08,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:08,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 04:47:08,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655439539] [2020-08-22 04:47:08,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 04:47:08,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:08,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 04:47:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 04:47:08,756 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 43 states. [2020-08-22 04:47:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:09,325 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-08-22 04:47:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 04:47:09,326 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-08-22 04:47:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:09,327 INFO L225 Difference]: With dead ends: 130 [2020-08-22 04:47:09,327 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 04:47:09,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=874, Invalid=1196, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 04:47:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 04:47:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-22 04:47:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 04:47:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-08-22 04:47:09,340 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-08-22 04:47:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:09,341 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-08-22 04:47:09,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 04:47:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-08-22 04:47:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-22 04:47:09,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:09,345 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:09,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 04:47:09,346 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:09,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1007038322, now seen corresponding path program 30 times [2020-08-22 04:47:09,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:09,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751985552] [2020-08-22 04:47:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:09,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:09,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:47:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat