/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=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:48:30,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:48:30,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:48:30,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:48:30,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:48:30,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:48:30,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:48:30,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:48:30,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:48:30,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:48:30,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:48:30,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:48:30,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:48:30,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:48:30,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:48:30,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:48:30,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:48:30,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:48:30,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:48:30,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:48:30,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:48:30,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:48:30,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:48:30,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:48:30,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:48:30,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:48:30,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:48:30,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:48:30,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:48:30,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:48:30,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:48:30,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:48:30,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:48:30,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:48:30,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:48:30,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:48:30,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:48:30,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:48:30,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:48:30,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:48:30,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:48:30,753 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 03:48:30,779 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:48:30,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:48:30,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:48:30,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:48:30,781 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:48:30,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:48:30,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:48:30,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:48:30,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:48:30,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:48:30,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:48:30,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:48:30,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:48:30,783 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:48:30,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:48:30,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:48:30,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:48:30,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:48:30,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:48:30,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:48:30,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:48:30,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:48:30,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:48:30,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:48:30,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:48:30,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:48:30,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:48:30,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:48:30,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:48:30,786 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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-08-22 03:48:31,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:48:31,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:48:31,132 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:48:31,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:48:31,136 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:48:31,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 03:48:31,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e29db273/04a18cec5ebf4a4ababba440107e11a4/FLAG45cd56266 [2020-08-22 03:48:31,680 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:48:31,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 03:48:31,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e29db273/04a18cec5ebf4a4ababba440107e11a4/FLAG45cd56266 [2020-08-22 03:48:32,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e29db273/04a18cec5ebf4a4ababba440107e11a4 [2020-08-22 03:48:32,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:48:32,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:48:32,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:48:32,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:48:32,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:48:32,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ccd168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32, skipping insertion in model container [2020-08-22 03:48:32,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:48:32,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:48:32,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:48:32,283 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:48:32,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:48:32,431 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:48:32,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32 WrapperNode [2020-08-22 03:48:32,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:48:32,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:48:32,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:48:32,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:48:32,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (1/1) ... [2020-08-22 03:48:32,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:48:32,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:48:32,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:48:32,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:48:32,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (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 03:48:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:48:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:48:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 03:48:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 03:48:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 03:48:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 03:48:32,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:48:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:48:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 03:48:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 03:48:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 03:48:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 03:48:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 03:48:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 03:48:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:48:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:48:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:48:33,112 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:48:33,112 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 03:48:33,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:48:33 BoogieIcfgContainer [2020-08-22 03:48:33,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:48:33,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:48:33,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:48:33,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:48:33,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:48:32" (1/3) ... [2020-08-22 03:48:33,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1129a3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:48:33, skipping insertion in model container [2020-08-22 03:48:33,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:32" (2/3) ... [2020-08-22 03:48:33,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1129a3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:48:33, skipping insertion in model container [2020-08-22 03:48:33,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:48:33" (3/3) ... [2020-08-22 03:48:33,126 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-22 03:48:33,137 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:48:33,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:48:33,160 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:48:33,185 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:48:33,185 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:48:33,186 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:48:33,186 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:48:33,186 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:48:33,186 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:48:33,186 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:48:33,186 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:48:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 03:48:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 03:48:33,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:33,214 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:33,215 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:33,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-22 03:48:33,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:33,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264766186] [2020-08-22 03:48:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 03:48:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 03:48:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 03:48:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:33,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264766186] [2020-08-22 03:48:33,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:33,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 03:48:33,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003788060] [2020-08-22 03:48:33,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:48:33,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:48:33,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:48:33,562 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-22 03:48:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:33,702 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-22 03:48:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:48:33,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-22 03:48:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:33,717 INFO L225 Difference]: With dead ends: 136 [2020-08-22 03:48:33,717 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 03:48:33,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:48:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 03:48:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-22 03:48:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 03:48:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-22 03:48:33,776 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-22 03:48:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:33,776 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-22 03:48:33,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:48:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-22 03:48:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 03:48:33,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:33,781 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:33,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:48:33,781 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-22 03:48:33,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:33,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136158714] [2020-08-22 03:48:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 03:48:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 03:48:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 03:48:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:33,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136158714] [2020-08-22 03:48:33,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:33,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 03:48:33,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380908707] [2020-08-22 03:48:33,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:48:33,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:33,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:48:33,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:48:33,925 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-22 03:48:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:34,056 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-22 03:48:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:48:34,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-22 03:48:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:34,060 INFO L225 Difference]: With dead ends: 129 [2020-08-22 03:48:34,060 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 03:48:34,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:48:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 03:48:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-22 03:48:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 03:48:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-22 03:48:34,105 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-22 03:48:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:34,105 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-22 03:48:34,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:48:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-22 03:48:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 03:48:34,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:34,111 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:34,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:48:34,111 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-22 03:48:34,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:34,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861371910] [2020-08-22 03:48:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 03:48:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 03:48:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 03:48:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:34,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861371910] [2020-08-22 03:48:34,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:34,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 03:48:34,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33361376] [2020-08-22 03:48:34,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:48:34,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:48:34,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:48:34,360 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-22 03:48:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:34,501 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-22 03:48:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:48:34,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-22 03:48:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:34,505 INFO L225 Difference]: With dead ends: 145 [2020-08-22 03:48:34,505 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 03:48:34,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:48:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 03:48:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-22 03:48:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 03:48:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-22 03:48:34,521 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-22 03:48:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:34,522 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-22 03:48:34,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:48:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-22 03:48:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 03:48:34,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:34,525 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:34,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:48:34,526 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-22 03:48:34,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:34,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287725854] [2020-08-22 03:48:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 03:48:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 03:48:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 03:48:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:34,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287725854] [2020-08-22 03:48:34,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:34,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 03:48:34,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478140700] [2020-08-22 03:48:34,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:48:34,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:48:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:48:34,617 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-22 03:48:34,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:34,694 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-22 03:48:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:48:34,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-22 03:48:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:34,696 INFO L225 Difference]: With dead ends: 156 [2020-08-22 03:48:34,696 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 03:48:34,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:48:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 03:48:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-22 03:48:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 03:48:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-22 03:48:34,712 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-22 03:48:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:34,712 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-22 03:48:34,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:48:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-22 03:48:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 03:48:34,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:34,716 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:34,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:48:34,716 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-22 03:48:34,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:34,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349865030] [2020-08-22 03:48:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 03:48:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 03:48:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 03:48:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:34,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349865030] [2020-08-22 03:48:34,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:34,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 03:48:34,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797974968] [2020-08-22 03:48:34,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:48:34,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:48:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:48:34,854 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-22 03:48:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:34,978 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-22 03:48:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:48:34,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-22 03:48:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:34,983 INFO L225 Difference]: With dead ends: 166 [2020-08-22 03:48:34,983 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 03:48:34,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:48:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 03:48:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-22 03:48:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 03:48:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-22 03:48:35,015 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-22 03:48:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:35,016 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-22 03:48:35,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:48:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-22 03:48:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 03:48:35,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:35,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:35,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:48:35,027 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:35,028 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-22 03:48:35,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:35,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871736510] [2020-08-22 03:48:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 03:48:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 03:48:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 03:48:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:35,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871736510] [2020-08-22 03:48:35,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:35,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 03:48:35,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169465815] [2020-08-22 03:48:35,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:48:35,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:48:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:48:35,188 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-22 03:48:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:35,298 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 03:48:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:48:35,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-22 03:48:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:35,301 INFO L225 Difference]: With dead ends: 176 [2020-08-22 03:48:35,301 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 03:48:35,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:48:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 03:48:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-22 03:48:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 03:48:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-22 03:48:35,315 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-22 03:48:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:35,315 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-22 03:48:35,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:48:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-22 03:48:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 03:48:35,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:35,317 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:35,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:48:35,318 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:35,318 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-22 03:48:35,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:35,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201490250] [2020-08-22 03:48:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 03:48:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 03:48:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 03:48:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:35,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201490250] [2020-08-22 03:48:35,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:35,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:48:35,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053898952] [2020-08-22 03:48:35,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:48:35,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:35,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:48:35,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:48:35,462 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-22 03:48:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:35,602 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-22 03:48:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:48:35,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-22 03:48:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:35,604 INFO L225 Difference]: With dead ends: 178 [2020-08-22 03:48:35,605 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 03:48:35,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:48:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 03:48:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-22 03:48:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 03:48:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-22 03:48:35,619 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-22 03:48:35,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:35,620 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-22 03:48:35,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:48:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-22 03:48:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 03:48:35,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:35,622 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:35,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:48:35,622 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-22 03:48:35,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:35,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817527387] [2020-08-22 03:48:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 03:48:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 03:48:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 03:48:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:35,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817527387] [2020-08-22 03:48:35,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:35,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:48:35,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697767985] [2020-08-22 03:48:35,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:48:35,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:35,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:48:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:48:35,733 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-22 03:48:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:35,824 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-22 03:48:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:48:35,825 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-22 03:48:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:35,826 INFO L225 Difference]: With dead ends: 193 [2020-08-22 03:48:35,826 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 03:48:35,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:48:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 03:48:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-22 03:48:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 03:48:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-22 03:48:35,838 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-22 03:48:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:35,839 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-22 03:48:35,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:48:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-22 03:48:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 03:48:35,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:35,840 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:35,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:48:35,841 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-22 03:48:35,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:35,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286087092] [2020-08-22 03:48:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:48:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 03:48:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:35,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 03:48:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:36,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286087092] [2020-08-22 03:48:36,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:36,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:48:36,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217184479] [2020-08-22 03:48:36,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:48:36,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:36,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:48:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:48:36,024 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-22 03:48:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:36,179 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-22 03:48:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:48:36,180 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-22 03:48:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:36,182 INFO L225 Difference]: With dead ends: 190 [2020-08-22 03:48:36,182 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 03:48:36,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:48:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 03:48:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-22 03:48:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 03:48:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-22 03:48:36,194 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-22 03:48:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:36,194 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-22 03:48:36,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:48:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-22 03:48:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 03:48:36,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:36,196 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:36,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:48:36,196 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-22 03:48:36,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:36,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824655146] [2020-08-22 03:48:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 03:48:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 03:48:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 03:48:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:36,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824655146] [2020-08-22 03:48:36,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:36,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:48:36,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539400910] [2020-08-22 03:48:36,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:48:36,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:48:36,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:48:36,306 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-22 03:48:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:36,410 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-22 03:48:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:48:36,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 03:48:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:36,412 INFO L225 Difference]: With dead ends: 210 [2020-08-22 03:48:36,412 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 03:48:36,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:48:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 03:48:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-22 03:48:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 03:48:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-22 03:48:36,424 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-22 03:48:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:36,424 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-22 03:48:36,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:48:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-22 03:48:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 03:48:36,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:36,426 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:36,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:48:36,426 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:36,427 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-22 03:48:36,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:36,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150413577] [2020-08-22 03:48:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 03:48:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 03:48:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 03:48:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:36,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150413577] [2020-08-22 03:48:36,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:36,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:48:36,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699600368] [2020-08-22 03:48:36,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:48:36,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:36,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:48:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:48:36,602 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-22 03:48:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:36,787 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-22 03:48:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:48:36,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 03:48:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:36,789 INFO L225 Difference]: With dead ends: 202 [2020-08-22 03:48:36,789 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 03:48:36,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:48:36,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 03:48:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-22 03:48:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 03:48:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-22 03:48:36,801 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-22 03:48:36,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:36,801 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-22 03:48:36,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:48:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-22 03:48:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 03:48:36,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:36,803 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:36,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:48:36,803 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-22 03:48:36,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:36,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804784992] [2020-08-22 03:48:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 03:48:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 03:48:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 03:48:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:36,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804784992] [2020-08-22 03:48:36,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:36,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:48:36,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763623357] [2020-08-22 03:48:36,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:48:36,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:48:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:48:36,926 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-22 03:48:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:37,042 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-22 03:48:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:48:37,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 03:48:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:37,044 INFO L225 Difference]: With dead ends: 227 [2020-08-22 03:48:37,044 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 03:48:37,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:48:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 03:48:37,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-22 03:48:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 03:48:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-22 03:48:37,056 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-22 03:48:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:37,056 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-22 03:48:37,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:48:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-22 03:48:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 03:48:37,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:37,057 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:37,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:48:37,058 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:37,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-22 03:48:37,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:37,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053718499] [2020-08-22 03:48:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 03:48:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 03:48:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 03:48:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:37,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053718499] [2020-08-22 03:48:37,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:37,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:48:37,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029198396] [2020-08-22 03:48:37,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:48:37,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:37,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:48:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:48:37,241 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-22 03:48:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:37,469 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-22 03:48:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:48:37,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-22 03:48:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:37,472 INFO L225 Difference]: With dead ends: 214 [2020-08-22 03:48:37,473 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 03:48:37,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:48:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 03:48:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-22 03:48:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 03:48:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-22 03:48:37,488 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-22 03:48:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:37,490 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-22 03:48:37,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:48:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-22 03:48:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 03:48:37,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:37,491 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:37,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:48:37,492 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-22 03:48:37,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:37,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565583004] [2020-08-22 03:48:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 03:48:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 03:48:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 03:48:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:37,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565583004] [2020-08-22 03:48:37,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:37,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:48:37,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352612846] [2020-08-22 03:48:37,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:48:37,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:48:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:48:37,686 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-22 03:48:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:37,822 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-22 03:48:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:48:37,823 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 03:48:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:37,824 INFO L225 Difference]: With dead ends: 244 [2020-08-22 03:48:37,824 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 03:48:37,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:48:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 03:48:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-22 03:48:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 03:48:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-22 03:48:37,836 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-22 03:48:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:37,837 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-22 03:48:37,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:48:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-22 03:48:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 03:48:37,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:37,839 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:37,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:48:37,839 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-22 03:48:37,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:37,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011905037] [2020-08-22 03:48:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:37,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 03:48:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 03:48:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 03:48:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:38,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011905037] [2020-08-22 03:48:38,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:38,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:48:38,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028802842] [2020-08-22 03:48:38,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:48:38,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:38,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:48:38,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:48:38,037 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-22 03:48:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:38,264 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-22 03:48:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 03:48:38,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-22 03:48:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:38,266 INFO L225 Difference]: With dead ends: 226 [2020-08-22 03:48:38,267 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 03:48:38,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:48:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 03:48:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-22 03:48:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 03:48:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-22 03:48:38,278 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-22 03:48:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:38,279 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-22 03:48:38,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:48:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-22 03:48:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 03:48:38,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:38,280 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:38,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:48:38,281 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-22 03:48:38,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:38,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876325316] [2020-08-22 03:48:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 03:48:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 03:48:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 03:48:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:38,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876325316] [2020-08-22 03:48:38,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:38,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:48:38,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33820097] [2020-08-22 03:48:38,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:48:38,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:48:38,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:48:38,443 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-22 03:48:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:38,595 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-22 03:48:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 03:48:38,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-22 03:48:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:38,598 INFO L225 Difference]: With dead ends: 261 [2020-08-22 03:48:38,598 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 03:48:38,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:48:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 03:48:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-22 03:48:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 03:48:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-22 03:48:38,611 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-22 03:48:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:38,612 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-22 03:48:38,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:48:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-22 03:48:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 03:48:38,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:38,613 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:38,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:48:38,614 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:38,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-22 03:48:38,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:38,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822430307] [2020-08-22 03:48:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 03:48:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 03:48:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 03:48:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:38,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822430307] [2020-08-22 03:48:38,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:38,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:48:38,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520976165] [2020-08-22 03:48:38,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:48:38,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:38,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:48:38,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:48:38,854 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-22 03:48:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:39,110 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-22 03:48:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 03:48:39,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-22 03:48:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:39,114 INFO L225 Difference]: With dead ends: 238 [2020-08-22 03:48:39,114 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 03:48:39,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:48:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 03:48:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-22 03:48:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 03:48:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-22 03:48:39,128 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-22 03:48:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:39,128 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-22 03:48:39,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:48:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-22 03:48:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 03:48:39,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:39,130 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:39,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:48:39,130 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-22 03:48:39,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:39,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189070636] [2020-08-22 03:48:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 03:48:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 03:48:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 03:48:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:39,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189070636] [2020-08-22 03:48:39,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:39,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:48:39,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940169083] [2020-08-22 03:48:39,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:48:39,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:39,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:48:39,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:48:39,301 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-22 03:48:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:39,452 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-22 03:48:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 03:48:39,452 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-22 03:48:39,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:39,454 INFO L225 Difference]: With dead ends: 278 [2020-08-22 03:48:39,454 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 03:48:39,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:48:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 03:48:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-22 03:48:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 03:48:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-22 03:48:39,467 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-22 03:48:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:39,468 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-22 03:48:39,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:48:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-22 03:48:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 03:48:39,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:39,471 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:39,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 03:48:39,471 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-22 03:48:39,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:39,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553728256] [2020-08-22 03:48:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 03:48:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 03:48:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 03:48:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:39,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553728256] [2020-08-22 03:48:39,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:39,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:48:39,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565269126] [2020-08-22 03:48:39,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:48:39,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:48:39,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:48:39,758 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-22 03:48:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:40,139 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-22 03:48:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 03:48:40,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-22 03:48:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:40,142 INFO L225 Difference]: With dead ends: 250 [2020-08-22 03:48:40,142 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 03:48:40,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:48:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 03:48:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-22 03:48:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 03:48:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-22 03:48:40,159 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-22 03:48:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:40,159 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-22 03:48:40,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:48:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-22 03:48:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 03:48:40,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:40,162 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:40,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 03:48:40,162 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:40,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:40,163 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-22 03:48:40,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:40,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85160904] [2020-08-22 03:48:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 03:48:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 03:48:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 03:48:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:40,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85160904] [2020-08-22 03:48:40,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:40,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:48:40,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567579612] [2020-08-22 03:48:40,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:48:40,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:40,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:48:40,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:48:40,419 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-22 03:48:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:40,567 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-22 03:48:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 03:48:40,567 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-22 03:48:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:40,570 INFO L225 Difference]: With dead ends: 295 [2020-08-22 03:48:40,570 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 03:48:40,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:48:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 03:48:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-22 03:48:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 03:48:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-22 03:48:40,591 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-22 03:48:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:40,591 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-22 03:48:40,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:48:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-22 03:48:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 03:48:40,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:40,593 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:40,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 03:48:40,593 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-22 03:48:40,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:40,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137726381] [2020-08-22 03:48:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 03:48:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 03:48:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 03:48:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:40,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137726381] [2020-08-22 03:48:40,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:40,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 03:48:40,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889666204] [2020-08-22 03:48:40,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 03:48:40,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:40,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 03:48:40,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:48:40,900 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-22 03:48:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:41,398 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-22 03:48:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:48:41,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-22 03:48:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:41,401 INFO L225 Difference]: With dead ends: 262 [2020-08-22 03:48:41,401 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 03:48:41,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:48:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 03:48:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-22 03:48:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 03:48:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-22 03:48:41,420 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-22 03:48:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:41,421 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-22 03:48:41,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 03:48:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-22 03:48:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 03:48:41,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:41,425 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:41,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 03:48:41,429 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-22 03:48:41,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:41,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693150615] [2020-08-22 03:48:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 03:48:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 03:48:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 03:48:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:41,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693150615] [2020-08-22 03:48:41,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:41,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 03:48:41,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238973948] [2020-08-22 03:48:41,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 03:48:41,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 03:48:41,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:48:41,779 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-22 03:48:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:41,958 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-22 03:48:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:48:41,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-22 03:48:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:41,965 INFO L225 Difference]: With dead ends: 312 [2020-08-22 03:48:41,965 INFO L226 Difference]: Without dead ends: 222 [2020-08-22 03:48:41,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:48:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-22 03:48:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-22 03:48:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 03:48:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-22 03:48:41,988 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-22 03:48:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:41,988 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-22 03:48:41,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 03:48:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-22 03:48:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 03:48:41,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:41,990 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:41,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 03:48:41,991 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:41,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-22 03:48:41,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:41,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722708020] [2020-08-22 03:48:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 03:48:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 03:48:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 03:48:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:42,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722708020] [2020-08-22 03:48:42,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:42,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 03:48:42,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787982874] [2020-08-22 03:48:42,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 03:48:42,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 03:48:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:48:42,350 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-22 03:48:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:42,779 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-22 03:48:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 03:48:42,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-22 03:48:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:42,782 INFO L225 Difference]: With dead ends: 274 [2020-08-22 03:48:42,782 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 03:48:42,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:48:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 03:48:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-22 03:48:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 03:48:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-22 03:48:42,797 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-22 03:48:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:42,797 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-22 03:48:42,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 03:48:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-22 03:48:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 03:48:42,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:42,799 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:42,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 03:48:42,800 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-22 03:48:42,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:42,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184019260] [2020-08-22 03:48:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 03:48:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 03:48:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 03:48:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:43,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184019260] [2020-08-22 03:48:43,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:43,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 03:48:43,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125390372] [2020-08-22 03:48:43,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 03:48:43,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 03:48:43,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:48:43,020 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-22 03:48:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:43,224 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-22 03:48:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 03:48:43,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-22 03:48:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:43,227 INFO L225 Difference]: With dead ends: 329 [2020-08-22 03:48:43,227 INFO L226 Difference]: Without dead ends: 236 [2020-08-22 03:48:43,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:48:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-22 03:48:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-22 03:48:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 03:48:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-22 03:48:43,247 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-22 03:48:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:43,247 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-22 03:48:43,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 03:48:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-22 03:48:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 03:48:43,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:43,251 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:43,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 03:48:43,254 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:43,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-22 03:48:43,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:43,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774707191] [2020-08-22 03:48:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 03:48:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 03:48:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 03:48:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:43,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774707191] [2020-08-22 03:48:43,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:43,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 03:48:43,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859190152] [2020-08-22 03:48:43,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 03:48:43,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:43,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 03:48:43,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:48:43,621 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-22 03:48:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:44,044 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-22 03:48:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 03:48:44,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-22 03:48:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:44,047 INFO L225 Difference]: With dead ends: 286 [2020-08-22 03:48:44,047 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 03:48:44,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:48:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 03:48:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-22 03:48:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 03:48:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-22 03:48:44,064 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-22 03:48:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:44,064 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-22 03:48:44,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 03:48:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-22 03:48:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 03:48:44,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:44,066 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:44,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 03:48:44,066 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-22 03:48:44,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:44,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707453358] [2020-08-22 03:48:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 03:48:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 03:48:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 03:48:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:44,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707453358] [2020-08-22 03:48:44,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:44,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 03:48:44,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720344437] [2020-08-22 03:48:44,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 03:48:44,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:44,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 03:48:44,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:48:44,355 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-22 03:48:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:44,594 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-22 03:48:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 03:48:44,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-22 03:48:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:44,597 INFO L225 Difference]: With dead ends: 346 [2020-08-22 03:48:44,597 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 03:48:44,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:48:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 03:48:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-22 03:48:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 03:48:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-22 03:48:44,612 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-22 03:48:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:44,612 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-22 03:48:44,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 03:48:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-22 03:48:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 03:48:44,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:44,614 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:44,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 03:48:44,615 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-22 03:48:44,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:44,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750199183] [2020-08-22 03:48:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 03:48:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 03:48:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 03:48:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 03:48:44,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750199183] [2020-08-22 03:48:44,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:48:44,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:48:44,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812348218] [2020-08-22 03:48:44,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:48:44,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:44,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:48:44,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:48:44,673 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-22 03:48:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:44,686 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-22 03:48:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:48:44,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 03:48:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:44,688 INFO L225 Difference]: With dead ends: 160 [2020-08-22 03:48:44,688 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 03:48:44,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:48:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 03:48:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 03:48:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 03:48:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-22 03:48:44,700 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-22 03:48:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:44,700 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-22 03:48:44,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:48:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-22 03:48:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 03:48:44,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:44,702 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:44,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 03:48:44,702 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:44,702 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-22 03:48:44,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:44,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654663872] [2020-08-22 03:48:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 03:48:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 03:48:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 03:48:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 03:48:44,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654663872] [2020-08-22 03:48:44,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:48:44,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:48:44,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623465079] [2020-08-22 03:48:44,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:48:44,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:44,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:48:44,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:48:44,767 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-22 03:48:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:44,792 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-22 03:48:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:48:44,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-22 03:48:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:44,794 INFO L225 Difference]: With dead ends: 161 [2020-08-22 03:48:44,794 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 03:48:44,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:48:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 03:48:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 03:48:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 03:48:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-22 03:48:44,807 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-22 03:48:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:44,807 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-22 03:48:44,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:48:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-22 03:48:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 03:48:44,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:44,809 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:44,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 03:48:44,809 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-22 03:48:44,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:44,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244096024] [2020-08-22 03:48:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:44,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 03:48:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 03:48:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 03:48:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:45,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244096024] [2020-08-22 03:48:45,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:45,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 03:48:45,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255995854] [2020-08-22 03:48:45,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 03:48:45,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:45,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 03:48:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:48:45,193 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-22 03:48:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:45,742 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-22 03:48:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 03:48:45,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-22 03:48:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:45,745 INFO L225 Difference]: With dead ends: 298 [2020-08-22 03:48:45,745 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 03:48:45,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:48:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 03:48:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-22 03:48:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 03:48:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-22 03:48:45,759 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-22 03:48:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:45,760 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-22 03:48:45,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 03:48:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-22 03:48:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 03:48:45,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:45,761 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:45,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 03:48:45,762 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:45,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-22 03:48:45,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:45,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486866069] [2020-08-22 03:48:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 03:48:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:45,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 03:48:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 03:48:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:46,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486866069] [2020-08-22 03:48:46,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:46,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 03:48:46,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310640827] [2020-08-22 03:48:46,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 03:48:46,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:46,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 03:48:46,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:48:46,019 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-22 03:48:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:46,241 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-22 03:48:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 03:48:46,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-22 03:48:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:46,244 INFO L225 Difference]: With dead ends: 363 [2020-08-22 03:48:46,244 INFO L226 Difference]: Without dead ends: 264 [2020-08-22 03:48:46,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:48:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-22 03:48:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-22 03:48:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 03:48:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-22 03:48:46,260 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-22 03:48:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:46,260 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-22 03:48:46,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 03:48:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-22 03:48:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 03:48:46,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:46,262 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:46,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 03:48:46,262 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-22 03:48:46,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:46,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716969029] [2020-08-22 03:48:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 03:48:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 03:48:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 03:48:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:46,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716969029] [2020-08-22 03:48:46,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:46,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 03:48:46,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731161541] [2020-08-22 03:48:46,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 03:48:46,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 03:48:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:48:46,681 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-22 03:48:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:47,333 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-22 03:48:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 03:48:47,335 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-22 03:48:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:47,337 INFO L225 Difference]: With dead ends: 310 [2020-08-22 03:48:47,338 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 03:48:47,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:48:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 03:48:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-22 03:48:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 03:48:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-22 03:48:47,354 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-22 03:48:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:47,354 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-22 03:48:47,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 03:48:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-22 03:48:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 03:48:47,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:47,356 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:47,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 03:48:47,357 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:47,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:47,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-22 03:48:47,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:47,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613548097] [2020-08-22 03:48:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 03:48:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 03:48:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 03:48:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:47,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613548097] [2020-08-22 03:48:47,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:47,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 03:48:47,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978061257] [2020-08-22 03:48:47,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 03:48:47,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:47,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 03:48:47,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:48:47,687 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-22 03:48:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:47,903 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-22 03:48:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 03:48:47,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-22 03:48:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:47,905 INFO L225 Difference]: With dead ends: 380 [2020-08-22 03:48:47,905 INFO L226 Difference]: Without dead ends: 278 [2020-08-22 03:48:47,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:48:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-22 03:48:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-22 03:48:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 03:48:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-22 03:48:47,923 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-22 03:48:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:47,923 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-22 03:48:47,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 03:48:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-22 03:48:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 03:48:47,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:47,925 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:47,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 03:48:47,926 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:47,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-22 03:48:47,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:47,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074188738] [2020-08-22 03:48:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:47,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:48,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 03:48:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:48,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 03:48:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:48,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 03:48:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:48,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074188738] [2020-08-22 03:48:48,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:48,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 03:48:48,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118405487] [2020-08-22 03:48:48,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 03:48:48,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:48,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 03:48:48,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:48:48,364 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-22 03:48:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:49,031 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-22 03:48:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 03:48:49,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 03:48:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:49,034 INFO L225 Difference]: With dead ends: 322 [2020-08-22 03:48:49,034 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 03:48:49,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-22 03:48:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 03:48:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-22 03:48:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 03:48:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-22 03:48:49,049 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-22 03:48:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:49,050 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-22 03:48:49,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 03:48:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-22 03:48:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 03:48:49,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:49,051 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:49,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 03:48:49,052 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:49,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-22 03:48:49,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:49,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296110601] [2020-08-22 03:48:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 03:48:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 03:48:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 03:48:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:49,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296110601] [2020-08-22 03:48:49,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:49,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 03:48:49,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691604104] [2020-08-22 03:48:49,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 03:48:49,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 03:48:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:48:49,392 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-22 03:48:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:49,687 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-22 03:48:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 03:48:49,688 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-22 03:48:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:49,690 INFO L225 Difference]: With dead ends: 397 [2020-08-22 03:48:49,691 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 03:48:49,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 03:48:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 03:48:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-22 03:48:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 03:48:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-22 03:48:49,720 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-22 03:48:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:49,721 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-22 03:48:49,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 03:48:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-22 03:48:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 03:48:49,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:49,723 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:49,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 03:48:49,723 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-22 03:48:49,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:49,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410565444] [2020-08-22 03:48:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:50,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 03:48:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:50,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 03:48:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:50,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 03:48:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:50,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410565444] [2020-08-22 03:48:50,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:50,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 03:48:50,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159334315] [2020-08-22 03:48:50,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 03:48:50,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 03:48:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 03:48:50,368 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-22 03:48:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:51,077 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-22 03:48:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 03:48:51,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-22 03:48:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:51,080 INFO L225 Difference]: With dead ends: 334 [2020-08-22 03:48:51,080 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 03:48:51,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:48:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 03:48:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-22 03:48:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 03:48:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-22 03:48:51,095 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-22 03:48:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:51,096 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-22 03:48:51,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 03:48:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-22 03:48:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 03:48:51,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:51,097 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:51,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 03:48:51,098 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:51,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-22 03:48:51,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:51,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340548240] [2020-08-22 03:48:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 03:48:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 03:48:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 03:48:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:51,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340548240] [2020-08-22 03:48:51,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:51,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 03:48:51,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64081581] [2020-08-22 03:48:51,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 03:48:51,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 03:48:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 03:48:51,432 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-22 03:48:51,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:51,725 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-22 03:48:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 03:48:51,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-22 03:48:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:51,729 INFO L225 Difference]: With dead ends: 414 [2020-08-22 03:48:51,729 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 03:48:51,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:48:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 03:48:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-22 03:48:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 03:48:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-22 03:48:51,754 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-22 03:48:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:51,754 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-22 03:48:51,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 03:48:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-22 03:48:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 03:48:51,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:51,756 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:51,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 03:48:51,757 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:51,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:51,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-22 03:48:51,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:51,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716454540] [2020-08-22 03:48:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:51,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:52,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 03:48:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:52,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 03:48:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:52,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 03:48:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:52,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716454540] [2020-08-22 03:48:52,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:52,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 03:48:52,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737687934] [2020-08-22 03:48:52,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 03:48:52,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 03:48:52,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:48:52,260 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-22 03:48:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:53,036 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-22 03:48:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 03:48:53,037 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-22 03:48:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:53,040 INFO L225 Difference]: With dead ends: 346 [2020-08-22 03:48:53,042 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 03:48:53,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-22 03:48:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 03:48:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-22 03:48:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 03:48:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-22 03:48:53,060 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-22 03:48:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:53,060 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-22 03:48:53,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 03:48:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-22 03:48:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 03:48:53,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:53,063 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:53,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 03:48:53,064 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-22 03:48:53,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:53,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102686051] [2020-08-22 03:48:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 03:48:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 03:48:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 03:48:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:53,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102686051] [2020-08-22 03:48:53,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:53,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 03:48:53,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229658642] [2020-08-22 03:48:53,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 03:48:53,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:53,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 03:48:53,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:48:53,455 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-22 03:48:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:53,735 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-22 03:48:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 03:48:53,736 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-22 03:48:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:53,738 INFO L225 Difference]: With dead ends: 431 [2020-08-22 03:48:53,738 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 03:48:53,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 03:48:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 03:48:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-22 03:48:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-22 03:48:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-22 03:48:53,756 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-22 03:48:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:53,757 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-22 03:48:53,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 03:48:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-22 03:48:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 03:48:53,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:53,759 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:53,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 03:48:53,759 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-22 03:48:53,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:53,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700715568] [2020-08-22 03:48:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:53,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:54,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 03:48:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:54,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 03:48:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 03:48:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:54,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700715568] [2020-08-22 03:48:54,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:54,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 03:48:54,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555820780] [2020-08-22 03:48:54,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 03:48:54,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:54,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 03:48:54,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 03:48:54,287 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-22 03:48:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:55,060 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-22 03:48:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 03:48:55,064 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-22 03:48:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:55,066 INFO L225 Difference]: With dead ends: 358 [2020-08-22 03:48:55,067 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 03:48:55,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:48:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 03:48:55,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-22 03:48:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 03:48:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-22 03:48:55,086 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-22 03:48:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:55,086 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-22 03:48:55,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 03:48:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-22 03:48:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 03:48:55,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:55,088 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:55,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 03:48:55,088 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-22 03:48:55,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:55,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267073422] [2020-08-22 03:48:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 03:48:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 03:48:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:48:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:55,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267073422] [2020-08-22 03:48:55,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:55,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 03:48:55,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661952523] [2020-08-22 03:48:55,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 03:48:55,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:55,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 03:48:55,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 03:48:55,502 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-22 03:48:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:55,783 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-22 03:48:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 03:48:55,784 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-22 03:48:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:55,787 INFO L225 Difference]: With dead ends: 448 [2020-08-22 03:48:55,787 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 03:48:55,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:48:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 03:48:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-22 03:48:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 03:48:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-22 03:48:55,810 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-22 03:48:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:55,810 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-22 03:48:55,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 03:48:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-22 03:48:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 03:48:55,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:55,812 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:55,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 03:48:55,812 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-22 03:48:55,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:55,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570028615] [2020-08-22 03:48:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:55,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:56,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 03:48:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:56,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 03:48:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:56,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 03:48:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:56,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570028615] [2020-08-22 03:48:56,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:56,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 03:48:56,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948101739] [2020-08-22 03:48:56,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 03:48:56,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 03:48:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:48:56,428 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-22 03:48:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:57,365 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-22 03:48:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 03:48:57,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-22 03:48:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:57,368 INFO L225 Difference]: With dead ends: 370 [2020-08-22 03:48:57,368 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 03:48:57,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:48:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 03:48:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-22 03:48:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 03:48:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-22 03:48:57,390 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-22 03:48:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:57,391 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-22 03:48:57,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 03:48:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-22 03:48:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 03:48:57,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:57,392 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:57,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 03:48:57,393 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:57,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-22 03:48:57,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:57,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65160456] [2020-08-22 03:48:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:57,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:57,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:57,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:57,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 03:48:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:57,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 03:48:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:57,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 03:48:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:57,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65160456] [2020-08-22 03:48:57,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:57,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 03:48:57,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880692082] [2020-08-22 03:48:57,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 03:48:57,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:57,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 03:48:57,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:48:57,856 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-22 03:48:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:58,192 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-22 03:48:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 03:48:58,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-22 03:48:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:58,196 INFO L225 Difference]: With dead ends: 465 [2020-08-22 03:48:58,196 INFO L226 Difference]: Without dead ends: 348 [2020-08-22 03:48:58,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:48:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-22 03:48:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-22 03:48:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-22 03:48:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-22 03:48:58,213 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-22 03:48:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:58,214 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-22 03:48:58,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 03:48:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-22 03:48:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 03:48:58,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:58,216 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:58,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 03:48:58,216 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-22 03:48:58,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:58,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457677241] [2020-08-22 03:48:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:58,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:58,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:48:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:58,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:48:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:58,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 03:48:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:58,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 03:48:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:58,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 03:48:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:48:58,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457677241] [2020-08-22 03:48:58,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:58,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 03:48:58,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323224591] [2020-08-22 03:48:58,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 03:48:58,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:58,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 03:48:58,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:48:58,827 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-22 03:49:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:00,002 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-22 03:49:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 03:49:00,004 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-22 03:49:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:00,008 INFO L225 Difference]: With dead ends: 382 [2020-08-22 03:49:00,008 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 03:49:00,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:49:00,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 03:49:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-22 03:49:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 03:49:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-22 03:49:00,066 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-22 03:49:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:00,069 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-22 03:49:00,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 03:49:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-22 03:49:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 03:49:00,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:00,073 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:00,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 03:49:00,073 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-22 03:49:00,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:00,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231632833] [2020-08-22 03:49:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:00,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:00,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:00,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:00,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 03:49:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:00,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 03:49:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:00,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 03:49:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:49:00,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231632833] [2020-08-22 03:49:00,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:00,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 03:49:00,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108187012] [2020-08-22 03:49:00,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 03:49:00,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 03:49:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:49:00,578 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-22 03:49:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:00,935 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-22 03:49:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 03:49:00,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-22 03:49:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:00,942 INFO L225 Difference]: With dead ends: 482 [2020-08-22 03:49:00,942 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 03:49:00,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:49:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 03:49:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-22 03:49:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 03:49:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-22 03:49:00,963 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-22 03:49:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:00,963 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-22 03:49:00,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 03:49:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-22 03:49:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 03:49:00,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:00,965 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:00,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 03:49:00,965 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-22 03:49:00,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:00,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307427756] [2020-08-22 03:49:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:01,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:01,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:01,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:01,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 03:49:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:01,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 03:49:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:01,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 03:49:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:49:01,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307427756] [2020-08-22 03:49:01,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:01,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 03:49:01,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918686069] [2020-08-22 03:49:01,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 03:49:01,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:01,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 03:49:01,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:49:01,656 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-22 03:49:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:02,885 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-22 03:49:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 03:49:02,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-22 03:49:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:02,891 INFO L225 Difference]: With dead ends: 394 [2020-08-22 03:49:02,891 INFO L226 Difference]: Without dead ends: 277 [2020-08-22 03:49:02,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:49:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-22 03:49:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-22 03:49:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 03:49:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-22 03:49:02,912 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-22 03:49:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:02,912 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-22 03:49:02,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 03:49:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-22 03:49:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 03:49:02,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:02,914 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:02,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 03:49:02,914 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:02,915 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-22 03:49:02,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:02,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014296134] [2020-08-22 03:49:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:02,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:02,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:02,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:03,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 03:49:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:03,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 03:49:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:03,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 03:49:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:49:03,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014296134] [2020-08-22 03:49:03,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:03,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 03:49:03,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628734445] [2020-08-22 03:49:03,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 03:49:03,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:03,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 03:49:03,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:49:03,394 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-22 03:49:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:03,729 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-22 03:49:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 03:49:03,730 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-22 03:49:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:03,732 INFO L225 Difference]: With dead ends: 499 [2020-08-22 03:49:03,732 INFO L226 Difference]: Without dead ends: 376 [2020-08-22 03:49:03,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:49:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-22 03:49:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-22 03:49:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-22 03:49:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-22 03:49:03,752 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-22 03:49:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:03,753 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-22 03:49:03,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 03:49:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-22 03:49:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 03:49:03,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:03,754 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:03,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 03:49:03,754 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:03,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:03,755 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-22 03:49:03,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:03,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113475613] [2020-08-22 03:49:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:03,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:03,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:03,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:04,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 03:49:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:04,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 03:49:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:04,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 03:49:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:49:04,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113475613] [2020-08-22 03:49:04,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:04,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 03:49:04,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108668377] [2020-08-22 03:49:04,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 03:49:04,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:04,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 03:49:04,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:49:04,516 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-22 03:49:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:05,977 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-22 03:49:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 03:49:05,981 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-22 03:49:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:05,984 INFO L225 Difference]: With dead ends: 406 [2020-08-22 03:49:05,984 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 03:49:05,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:49:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 03:49:06,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-22 03:49:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 03:49:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-22 03:49:06,004 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-22 03:49:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:06,004 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-22 03:49:06,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 03:49:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-22 03:49:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 03:49:06,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:06,006 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:06,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 03:49:06,006 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-22 03:49:06,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:06,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601157894] [2020-08-22 03:49:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 03:49:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 03:49:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 03:49:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:49:06,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601157894] [2020-08-22 03:49:06,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:06,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 03:49:06,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578767964] [2020-08-22 03:49:06,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 03:49:06,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:06,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 03:49:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:49:06,564 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-22 03:49:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:06,880 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-22 03:49:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 03:49:06,881 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-22 03:49:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:06,884 INFO L225 Difference]: With dead ends: 516 [2020-08-22 03:49:06,884 INFO L226 Difference]: Without dead ends: 390 [2020-08-22 03:49:06,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:49:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-22 03:49:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-22 03:49:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 03:49:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-22 03:49:06,905 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-22 03:49:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:06,906 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-22 03:49:06,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 03:49:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-22 03:49:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 03:49:06,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:06,907 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:06,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 03:49:06,908 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:06,908 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-22 03:49:06,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:06,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452283107] [2020-08-22 03:49:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:06,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:07,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 03:49:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:07,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 03:49:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:07,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 03:49:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:49:07,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452283107] [2020-08-22 03:49:07,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:07,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 03:49:07,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18456936] [2020-08-22 03:49:07,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 03:49:07,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:07,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 03:49:07,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:49:07,771 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-22 03:49:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:09,192 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-22 03:49:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 03:49:09,193 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-22 03:49:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:09,195 INFO L225 Difference]: With dead ends: 418 [2020-08-22 03:49:09,195 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 03:49:09,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-22 03:49:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 03:49:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-22 03:49:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-22 03:49:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-22 03:49:09,214 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-22 03:49:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:09,215 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-22 03:49:09,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 03:49:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-22 03:49:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 03:49:09,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:09,216 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:09,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 03:49:09,217 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-22 03:49:09,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:09,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949957379] [2020-08-22 03:49:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:09,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:09,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:09,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:09,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 03:49:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:09,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 03:49:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:09,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 03:49:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 03:49:09,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949957379] [2020-08-22 03:49:09,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:09,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 03:49:09,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82457619] [2020-08-22 03:49:09,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 03:49:09,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 03:49:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:49:09,805 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-22 03:49:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:10,221 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-22 03:49:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 03:49:10,221 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-22 03:49:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:10,224 INFO L225 Difference]: With dead ends: 533 [2020-08-22 03:49:10,224 INFO L226 Difference]: Without dead ends: 404 [2020-08-22 03:49:10,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 03:49:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-22 03:49:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-22 03:49:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 03:49:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-22 03:49:10,245 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-22 03:49:10,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:10,246 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-22 03:49:10,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 03:49:10,246 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-22 03:49:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 03:49:10,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:10,248 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:10,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 03:49:10,248 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:10,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-22 03:49:10,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:10,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109138840] [2020-08-22 03:49:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 03:49:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 03:49:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 03:49:10,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109138840] [2020-08-22 03:49:10,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:49:10,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 03:49:10,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481132182] [2020-08-22 03:49:10,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:49:10,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:49:10,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:49:10,433 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-22 03:49:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:10,701 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-22 03:49:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:49:10,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 03:49:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:10,703 INFO L225 Difference]: With dead ends: 271 [2020-08-22 03:49:10,703 INFO L226 Difference]: Without dead ends: 261 [2020-08-22 03:49:10,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:49:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-22 03:49:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-22 03:49:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-22 03:49:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-22 03:49:10,729 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-22 03:49:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:10,730 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-22 03:49:10,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:49:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-22 03:49:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 03:49:10,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:10,732 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:10,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 03:49:10,732 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-22 03:49:10,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:10,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75611127] [2020-08-22 03:49:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 03:49:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 03:49:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 03:49:10,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75611127] [2020-08-22 03:49:10,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:10,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:49:10,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023682292] [2020-08-22 03:49:10,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:49:10,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:10,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:49:10,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:49:10,982 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-22 03:49:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:11,198 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-22 03:49:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:49:11,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 03:49:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:11,202 INFO L225 Difference]: With dead ends: 285 [2020-08-22 03:49:11,202 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 03:49:11,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:49:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 03:49:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-22 03:49:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 03:49:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-22 03:49:11,235 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-22 03:49:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:11,236 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-22 03:49:11,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:49:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-22 03:49:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 03:49:11,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:11,239 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:11,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 03:49:11,239 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-22 03:49:11,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:11,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972954758] [2020-08-22 03:49:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 03:49:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 03:49:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-22 03:49:11,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972954758] [2020-08-22 03:49:11,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:49:11,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:49:11,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722571768] [2020-08-22 03:49:11,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:49:11,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:11,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:49:11,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:49:11,371 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-22 03:49:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:11,430 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-22 03:49:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:49:11,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-22 03:49:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:11,433 INFO L225 Difference]: With dead ends: 271 [2020-08-22 03:49:11,433 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 03:49:11,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:49:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 03:49:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-22 03:49:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 03:49:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-22 03:49:11,470 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-22 03:49:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:11,470 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-22 03:49:11,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:49:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-22 03:49:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 03:49:11,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:11,474 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:11,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 03:49:11,474 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-22 03:49:11,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:11,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633935735] [2020-08-22 03:49:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 03:49:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 03:49:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 03:49:11,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633935735] [2020-08-22 03:49:11,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:11,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:49:11,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388051903] [2020-08-22 03:49:11,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:49:11,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:11,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:49:11,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:49:11,813 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-22 03:49:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:12,059 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-22 03:49:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:49:12,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-22 03:49:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:12,063 INFO L225 Difference]: With dead ends: 284 [2020-08-22 03:49:12,064 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 03:49:12,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:49:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 03:49:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-22 03:49:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-22 03:49:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-22 03:49:12,101 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-22 03:49:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:12,102 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-22 03:49:12,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:49:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-22 03:49:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 03:49:12,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:12,105 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:12,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 03:49:12,105 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:12,106 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-22 03:49:12,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:12,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049401261] [2020-08-22 03:49:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 03:49:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 03:49:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 03:49:12,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049401261] [2020-08-22 03:49:12,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:49:12,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 03:49:12,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717547048] [2020-08-22 03:49:12,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:49:12,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:12,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:49:12,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:49:12,303 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-22 03:49:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:12,430 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-22 03:49:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:49:12,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-22 03:49:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:12,433 INFO L225 Difference]: With dead ends: 303 [2020-08-22 03:49:12,433 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 03:49:12,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:49:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 03:49:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-22 03:49:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 03:49:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-22 03:49:12,465 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-22 03:49:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:12,466 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-22 03:49:12,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:49:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-22 03:49:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 03:49:12,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:12,468 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:12,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 03:49:12,469 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-22 03:49:12,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:12,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952473528] [2020-08-22 03:49:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:49:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 03:49:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 03:49:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 03:49:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 03:49:12,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952473528] [2020-08-22 03:49:12,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:12,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 03:49:12,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153942604] [2020-08-22 03:49:12,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:49:12,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:49:12,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:49:12,611 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-22 03:49:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:12,729 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-22 03:49:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:49:12,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-22 03:49:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:12,731 INFO L225 Difference]: With dead ends: 409 [2020-08-22 03:49:12,731 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 03:49:12,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:49:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 03:49:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-22 03:49:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 03:49:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 03:49:12,756 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-22 03:49:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:12,757 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 03:49:12,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:49:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 03:49:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 03:49:12,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:12,758 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:12,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 03:49:12,759 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:12,759 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-22 03:49:12,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:12,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670453919] [2020-08-22 03:49:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 03:49:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 03:49:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-22 03:49:12,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670453919] [2020-08-22 03:49:12,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:12,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:49:12,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941220517] [2020-08-22 03:49:12,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:49:12,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:12,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:49:12,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:49:12,957 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-22 03:49:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:13,082 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-22 03:49:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:49:13,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 03:49:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:13,084 INFO L225 Difference]: With dead ends: 173 [2020-08-22 03:49:13,084 INFO L226 Difference]: Without dead ends: 163 [2020-08-22 03:49:13,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:49:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-22 03:49:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-22 03:49:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 03:49:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-22 03:49:13,105 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-22 03:49:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:13,106 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-22 03:49:13,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:49:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-22 03:49:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 03:49:13,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:13,107 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:13,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 03:49:13,108 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:13,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-22 03:49:13,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:13,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769262143] [2020-08-22 03:49:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 03:49:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 03:49:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-22 03:49:13,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769262143] [2020-08-22 03:49:13,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:13,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:49:13,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190048533] [2020-08-22 03:49:13,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:49:13,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:49:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:49:13,399 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-22 03:49:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:13,683 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-22 03:49:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:49:13,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-22 03:49:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:13,686 INFO L225 Difference]: With dead ends: 175 [2020-08-22 03:49:13,686 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 03:49:13,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:49:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 03:49:13,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-22 03:49:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 03:49:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-22 03:49:13,705 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-22 03:49:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:13,705 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-22 03:49:13,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:49:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-22 03:49:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 03:49:13,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:13,707 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:13,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 03:49:13,707 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:13,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-22 03:49:13,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:13,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238229351] [2020-08-22 03:49:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 03:49:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 03:49:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-22 03:49:13,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238229351] [2020-08-22 03:49:13,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:49:13,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 03:49:13,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948714073] [2020-08-22 03:49:13,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:49:13,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:49:13,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:49:13,994 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-22 03:49:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:14,232 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-22 03:49:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:49:14,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-22 03:49:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:14,234 INFO L225 Difference]: With dead ends: 184 [2020-08-22 03:49:14,234 INFO L226 Difference]: Without dead ends: 174 [2020-08-22 03:49:14,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:49:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-22 03:49:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-22 03:49:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 03:49:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-22 03:49:14,267 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-22 03:49:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:14,269 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-22 03:49:14,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:49:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-22 03:49:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 03:49:14,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:14,271 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:14,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 03:49:14,271 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-22 03:49:14,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:14,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576296526] [2020-08-22 03:49:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 03:49:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 03:49:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 03:49:14,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576296526] [2020-08-22 03:49:14,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:14,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:49:14,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316608893] [2020-08-22 03:49:14,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:49:14,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:14,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:49:14,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:49:14,591 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-22 03:49:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:14,794 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-22 03:49:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:49:14,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-22 03:49:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:14,797 INFO L225 Difference]: With dead ends: 194 [2020-08-22 03:49:14,797 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 03:49:14,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:49:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 03:49:14,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-22 03:49:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 03:49:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-22 03:49:14,822 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-22 03:49:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:14,823 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-22 03:49:14,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:49:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-22 03:49:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 03:49:14,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:14,825 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:14,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 03:49:14,825 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:14,826 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-22 03:49:14,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:14,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399224848] [2020-08-22 03:49:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:14,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 03:49:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 03:49:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 03:49:15,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399224848] [2020-08-22 03:49:15,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:15,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:49:15,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340816158] [2020-08-22 03:49:15,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:49:15,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:15,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:49:15,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:49:15,098 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-22 03:49:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:15,288 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-22 03:49:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:49:15,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-22 03:49:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:15,290 INFO L225 Difference]: With dead ends: 160 [2020-08-22 03:49:15,290 INFO L226 Difference]: Without dead ends: 140 [2020-08-22 03:49:15,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:49:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-22 03:49:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-22 03:49:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 03:49:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-22 03:49:15,311 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-22 03:49:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:15,311 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-22 03:49:15,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:49:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-22 03:49:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 03:49:15,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:15,313 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:15,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 03:49:15,313 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-22 03:49:15,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:15,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886971818] [2020-08-22 03:49:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 03:49:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 03:49:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 03:49:15,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886971818] [2020-08-22 03:49:15,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:15,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:49:15,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043163328] [2020-08-22 03:49:15,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:49:15,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:15,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:49:15,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:49:15,678 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-22 03:49:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:15,949 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-22 03:49:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 03:49:15,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-22 03:49:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:15,953 INFO L225 Difference]: With dead ends: 155 [2020-08-22 03:49:15,953 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 03:49:15,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:49:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 03:49:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-22 03:49:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 03:49:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-22 03:49:15,967 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-22 03:49:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:15,967 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-22 03:49:15,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:49:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-22 03:49:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 03:49:15,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:49:15,969 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:49:15,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 03:49:15,969 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:49:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:49:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-22 03:49:15,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:49:15,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961543333] [2020-08-22 03:49:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:49:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:16,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:49:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:16,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:49:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:16,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:49:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:16,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 03:49:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:16,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 03:49:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:16,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 03:49:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:49:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-22 03:49:16,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961543333] [2020-08-22 03:49:16,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:49:16,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:49:16,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530861058] [2020-08-22 03:49:16,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:49:16,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:49:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:49:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:49:16,261 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-22 03:49:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:49:16,421 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-22 03:49:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:49:16,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-22 03:49:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:49:16,422 INFO L225 Difference]: With dead ends: 137 [2020-08-22 03:49:16,422 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:49:16,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:49:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:49:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:49:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:49:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:49:16,424 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-22 03:49:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:49:16,425 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:49:16,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:49:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:49:16,425 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:49:16,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 03:49:16,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:49:17,172 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136