/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:08:58,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:08:58,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:08:58,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:08:58,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:08:58,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:08:58,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:08:58,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:08:58,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:08:58,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:08:58,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:08:58,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:08:58,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:08:58,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:08:58,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:08:58,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:08:58,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:08:58,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:08:58,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:08:58,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:08:58,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:08:58,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:08:58,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:08:58,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:08:58,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:08:58,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:08:58,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:08:58,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:08:58,858 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 [2020-09-24 15:08:58,890 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:08:58,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:08:58,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:08:58,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:08:58,893 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:08:58,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:08:58,893 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:08:58,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:08:58,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:08:58,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:08:58,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:08:58,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:08:58,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:08:58,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:08:58,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:08:58,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:08:58,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:08:58,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:08:58,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:08:58,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:08:58,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:08:58,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:08:58,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:08:58,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:08:58,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:08:58,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:08:58,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:08:58,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:08:58,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:08:58,898 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:08:59,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:08:59,406 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:08:59,410 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:08:59,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:08:59,412 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:08:59,417 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-24 15:08:59,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91fe7b27c/a2bb5cdb525e42adb9bf0dba042376bd/FLAG37c4a6cf8 [2020-09-24 15:09:00,206 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:09:00,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-24 15:09:00,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91fe7b27c/a2bb5cdb525e42adb9bf0dba042376bd/FLAG37c4a6cf8 [2020-09-24 15:09:00,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91fe7b27c/a2bb5cdb525e42adb9bf0dba042376bd [2020-09-24 15:09:00,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:09:00,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:09:00,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:09:00,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:09:00,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:09:00,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:09:00" (1/1) ... [2020-09-24 15:09:00,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3310a15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:00, skipping insertion in model container [2020-09-24 15:09:00,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:09:00" (1/1) ... [2020-09-24 15:09:00,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:09:00,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:09:00,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:09:00,871 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:09:01,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:09:01,062 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:09:01,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01 WrapperNode [2020-09-24 15:09:01,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:09:01,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:09:01,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:09:01,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:09:01,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:09:01,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:09:01,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:09:01,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:09:01,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (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 [2020-09-24 15:09:01,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:09:01,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:09:01,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:09:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:09:01,250 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-24 15:09:01,250 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-24 15:09:01,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:09:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:09:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 15:09:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 15:09:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 15:09:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 15:09:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 15:09:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:09:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:09:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 15:09:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 15:09:02,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:09:02,145 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 15:09:02,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:09:02 BoogieIcfgContainer [2020-09-24 15:09:02,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:09:02,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:09:02,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:09:02,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:09:02,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:09:00" (1/3) ... [2020-09-24 15:09:02,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645167ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:09:02, skipping insertion in model container [2020-09-24 15:09:02,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (2/3) ... [2020-09-24 15:09:02,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645167ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:09:02, skipping insertion in model container [2020-09-24 15:09:02,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:09:02" (3/3) ... [2020-09-24 15:09:02,165 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-09-24 15:09:02,177 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:09:02,188 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:09:02,210 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:09:02,244 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:09:02,244 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:09:02,245 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:09:02,245 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:09:02,245 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:09:02,245 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:09:02,245 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:09:02,245 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:09:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states. [2020-09-24 15:09:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 15:09:02,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:02,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:02,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1533680843, now seen corresponding path program 1 times [2020-09-24 15:09:02,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:02,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996917165] [2020-09-24 15:09:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:03,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:03,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996917165] [2020-09-24 15:09:03,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:09:03,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:09:03,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287768396] [2020-09-24 15:09:03,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:09:03,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:03,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:09:03,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:09:03,237 INFO L87 Difference]: Start difference. First operand 348 states. Second operand 6 states. [2020-09-24 15:09:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:04,150 INFO L93 Difference]: Finished difference Result 386 states and 393 transitions. [2020-09-24 15:09:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:09:04,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2020-09-24 15:09:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:04,172 INFO L225 Difference]: With dead ends: 386 [2020-09-24 15:09:04,172 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 15:09:04,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:09:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 15:09:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 330. [2020-09-24 15:09:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-24 15:09:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-09-24 15:09:04,254 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 317 [2020-09-24 15:09:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:04,256 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-09-24 15:09:04,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:09:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-09-24 15:09:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 15:09:04,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:04,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:04,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:09:04,267 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:04,267 INFO L82 PathProgramCache]: Analyzing trace with hash 770044171, now seen corresponding path program 1 times [2020-09-24 15:09:04,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:04,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759050020] [2020-09-24 15:09:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:04,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759050020] [2020-09-24 15:09:04,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:09:04,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:09:04,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986784536] [2020-09-24 15:09:04,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:09:04,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:04,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:09:04,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:09:04,740 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 5 states. [2020-09-24 15:09:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:05,549 INFO L93 Difference]: Finished difference Result 374 states and 377 transitions. [2020-09-24 15:09:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:09:05,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-09-24 15:09:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:05,563 INFO L225 Difference]: With dead ends: 374 [2020-09-24 15:09:05,563 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 15:09:05,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:09:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 15:09:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-09-24 15:09:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-09-24 15:09:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2020-09-24 15:09:05,625 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 317 [2020-09-24 15:09:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:05,627 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2020-09-24 15:09:05,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:09:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2020-09-24 15:09:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-24 15:09:05,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:05,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:05,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:09:05,653 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash -913925315, now seen corresponding path program 1 times [2020-09-24 15:09:05,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:05,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779723710] [2020-09-24 15:09:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:06,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:06,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779723710] [2020-09-24 15:09:06,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:06,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 15:09:06,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199119510] [2020-09-24 15:09:06,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:09:06,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:06,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:09:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:09:06,291 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 6 states. [2020-09-24 15:09:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:07,052 INFO L93 Difference]: Finished difference Result 391 states and 394 transitions. [2020-09-24 15:09:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:09:07,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-09-24 15:09:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:07,056 INFO L225 Difference]: With dead ends: 391 [2020-09-24 15:09:07,056 INFO L226 Difference]: Without dead ends: 366 [2020-09-24 15:09:07,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:09:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-09-24 15:09:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-09-24 15:09:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-24 15:09:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-09-24 15:09:07,081 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 334 [2020-09-24 15:09:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:07,083 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-09-24 15:09:07,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:09:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-09-24 15:09:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-09-24 15:09:07,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:07,090 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:07,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:09:07,090 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash 646798155, now seen corresponding path program 2 times [2020-09-24 15:09:07,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:07,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848608329] [2020-09-24 15:09:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:07,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848608329] [2020-09-24 15:09:07,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:07,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:09:07,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961021836] [2020-09-24 15:09:07,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:09:07,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:09:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:09:07,631 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 7 states. [2020-09-24 15:09:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:08,548 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2020-09-24 15:09:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 15:09:08,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-09-24 15:09:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:08,553 INFO L225 Difference]: With dead ends: 408 [2020-09-24 15:09:08,553 INFO L226 Difference]: Without dead ends: 383 [2020-09-24 15:09:08,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:09:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-24 15:09:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-09-24 15:09:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-24 15:09:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2020-09-24 15:09:08,566 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 351 [2020-09-24 15:09:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:08,567 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2020-09-24 15:09:08,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:09:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2020-09-24 15:09:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-24 15:09:08,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:08,573 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:08,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:09:08,574 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash -539428611, now seen corresponding path program 3 times [2020-09-24 15:09:08,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:08,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911827677] [2020-09-24 15:09:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:08,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911827677] [2020-09-24 15:09:08,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:08,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:09:08,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117797369] [2020-09-24 15:09:08,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:09:08,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:08,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:09:08,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:09:08,983 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 8 states. [2020-09-24 15:09:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:09,990 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2020-09-24 15:09:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:09:09,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-09-24 15:09:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:09,994 INFO L225 Difference]: With dead ends: 425 [2020-09-24 15:09:09,995 INFO L226 Difference]: Without dead ends: 400 [2020-09-24 15:09:09,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:09:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-24 15:09:10,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-09-24 15:09:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-24 15:09:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2020-09-24 15:09:10,009 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 368 [2020-09-24 15:09:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:10,010 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2020-09-24 15:09:10,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:09:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2020-09-24 15:09:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-09-24 15:09:10,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:10,016 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:10,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:09:10,017 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1425394293, now seen corresponding path program 4 times [2020-09-24 15:09:10,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:10,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906806718] [2020-09-24 15:09:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:10,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906806718] [2020-09-24 15:09:10,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:10,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:09:10,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656045268] [2020-09-24 15:09:10,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:09:10,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:09:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:09:10,531 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 9 states. [2020-09-24 15:09:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:11,608 INFO L93 Difference]: Finished difference Result 442 states and 445 transitions. [2020-09-24 15:09:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 15:09:11,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-09-24 15:09:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:11,616 INFO L225 Difference]: With dead ends: 442 [2020-09-24 15:09:11,617 INFO L226 Difference]: Without dead ends: 417 [2020-09-24 15:09:11,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:09:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-24 15:09:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-09-24 15:09:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-24 15:09:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-09-24 15:09:11,639 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 385 [2020-09-24 15:09:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:11,640 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-09-24 15:09:11,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:09:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-09-24 15:09:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-24 15:09:11,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:11,643 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:11,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:09:11,643 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1042028867, now seen corresponding path program 5 times [2020-09-24 15:09:11,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:11,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842422678] [2020-09-24 15:09:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:12,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842422678] [2020-09-24 15:09:12,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:12,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:09:12,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139744380] [2020-09-24 15:09:12,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:09:12,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:12,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:09:12,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:09:12,193 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 10 states. [2020-09-24 15:09:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:13,505 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2020-09-24 15:09:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:09:13,506 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-09-24 15:09:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:13,509 INFO L225 Difference]: With dead ends: 459 [2020-09-24 15:09:13,512 INFO L226 Difference]: Without dead ends: 434 [2020-09-24 15:09:13,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:09:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-24 15:09:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-24 15:09:13,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-24 15:09:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2020-09-24 15:09:13,527 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 402 [2020-09-24 15:09:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:13,528 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2020-09-24 15:09:13,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:09:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2020-09-24 15:09:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 15:09:13,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:13,531 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:13,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:09:13,532 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1509982155, now seen corresponding path program 6 times [2020-09-24 15:09:13,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:13,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598305156] [2020-09-24 15:09:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:13,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 30 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:14,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598305156] [2020-09-24 15:09:14,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:14,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:09:14,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016262714] [2020-09-24 15:09:14,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:09:14,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:09:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:09:14,048 INFO L87 Difference]: Start difference. First operand 420 states and 421 transitions. Second operand 11 states. [2020-09-24 15:09:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:15,553 INFO L93 Difference]: Finished difference Result 476 states and 479 transitions. [2020-09-24 15:09:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:09:15,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-09-24 15:09:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:15,558 INFO L225 Difference]: With dead ends: 476 [2020-09-24 15:09:15,558 INFO L226 Difference]: Without dead ends: 451 [2020-09-24 15:09:15,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:09:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-09-24 15:09:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-09-24 15:09:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-09-24 15:09:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 438 transitions. [2020-09-24 15:09:15,571 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 438 transitions. Word has length 419 [2020-09-24 15:09:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:15,572 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 438 transitions. [2020-09-24 15:09:15,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:09:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 438 transitions. [2020-09-24 15:09:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-09-24 15:09:15,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:15,576 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:15,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:09:15,576 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1837327485, now seen corresponding path program 7 times [2020-09-24 15:09:15,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:15,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840966383] [2020-09-24 15:09:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 35 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:16,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840966383] [2020-09-24 15:09:16,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:16,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:09:16,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612028278] [2020-09-24 15:09:16,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:09:16,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:09:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:09:16,122 INFO L87 Difference]: Start difference. First operand 437 states and 438 transitions. Second operand 12 states. [2020-09-24 15:09:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:17,705 INFO L93 Difference]: Finished difference Result 493 states and 496 transitions. [2020-09-24 15:09:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:09:17,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 436 [2020-09-24 15:09:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:17,713 INFO L225 Difference]: With dead ends: 493 [2020-09-24 15:09:17,713 INFO L226 Difference]: Without dead ends: 468 [2020-09-24 15:09:17,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:09:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-09-24 15:09:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2020-09-24 15:09:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-09-24 15:09:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2020-09-24 15:09:17,730 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 436 [2020-09-24 15:09:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:17,731 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2020-09-24 15:09:17,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:09:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2020-09-24 15:09:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-09-24 15:09:17,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:17,738 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:17,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:09:17,738 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash 689191435, now seen corresponding path program 8 times [2020-09-24 15:09:17,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:17,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451884573] [2020-09-24 15:09:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 40 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:18,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451884573] [2020-09-24 15:09:18,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:18,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:09:18,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922897917] [2020-09-24 15:09:18,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:09:18,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:18,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:09:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:09:18,452 INFO L87 Difference]: Start difference. First operand 454 states and 455 transitions. Second operand 13 states. [2020-09-24 15:09:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:20,205 INFO L93 Difference]: Finished difference Result 510 states and 513 transitions. [2020-09-24 15:09:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:09:20,205 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 453 [2020-09-24 15:09:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:20,210 INFO L225 Difference]: With dead ends: 510 [2020-09-24 15:09:20,211 INFO L226 Difference]: Without dead ends: 485 [2020-09-24 15:09:20,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:09:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-09-24 15:09:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 471. [2020-09-24 15:09:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-09-24 15:09:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2020-09-24 15:09:20,225 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 453 [2020-09-24 15:09:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:20,225 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2020-09-24 15:09:20,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:09:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2020-09-24 15:09:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-09-24 15:09:20,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:20,229 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:20,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:09:20,230 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:20,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1771270717, now seen corresponding path program 9 times [2020-09-24 15:09:20,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:20,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212706019] [2020-09-24 15:09:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 45 proven. 657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:20,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212706019] [2020-09-24 15:09:20,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:20,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 15:09:20,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710023774] [2020-09-24 15:09:20,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 15:09:20,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:20,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 15:09:20,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:09:20,868 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand 14 states. [2020-09-24 15:09:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:22,950 INFO L93 Difference]: Finished difference Result 527 states and 530 transitions. [2020-09-24 15:09:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:09:22,951 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 470 [2020-09-24 15:09:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:22,954 INFO L225 Difference]: With dead ends: 527 [2020-09-24 15:09:22,955 INFO L226 Difference]: Without dead ends: 502 [2020-09-24 15:09:22,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-24 15:09:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-24 15:09:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 488. [2020-09-24 15:09:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-09-24 15:09:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 489 transitions. [2020-09-24 15:09:22,970 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 489 transitions. Word has length 470 [2020-09-24 15:09:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:22,971 INFO L479 AbstractCegarLoop]: Abstraction has 488 states and 489 transitions. [2020-09-24 15:09:22,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 15:09:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 489 transitions. [2020-09-24 15:09:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-09-24 15:09:22,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:22,975 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:22,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:09:22,975 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1528208309, now seen corresponding path program 10 times [2020-09-24 15:09:22,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:22,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325276626] [2020-09-24 15:09:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 50 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:23,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325276626] [2020-09-24 15:09:23,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:23,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 15:09:23,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781633307] [2020-09-24 15:09:23,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 15:09:23,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 15:09:23,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:09:23,774 INFO L87 Difference]: Start difference. First operand 488 states and 489 transitions. Second operand 15 states. [2020-09-24 15:09:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:25,986 INFO L93 Difference]: Finished difference Result 544 states and 547 transitions. [2020-09-24 15:09:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:09:25,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-09-24 15:09:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:25,991 INFO L225 Difference]: With dead ends: 544 [2020-09-24 15:09:25,991 INFO L226 Difference]: Without dead ends: 519 [2020-09-24 15:09:25,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-24 15:09:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-09-24 15:09:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 505. [2020-09-24 15:09:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-09-24 15:09:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2020-09-24 15:09:26,008 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 487 [2020-09-24 15:09:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:26,009 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2020-09-24 15:09:26,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 15:09:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2020-09-24 15:09:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-09-24 15:09:26,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:26,013 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:26,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:09:26,014 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2047864835, now seen corresponding path program 11 times [2020-09-24 15:09:26,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:26,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972060711] [2020-09-24 15:09:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 55 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:26,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972060711] [2020-09-24 15:09:26,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:26,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 15:09:26,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624314500] [2020-09-24 15:09:26,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 15:09:26,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:26,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 15:09:26,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:09:26,756 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand 16 states. [2020-09-24 15:09:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:29,277 INFO L93 Difference]: Finished difference Result 561 states and 564 transitions. [2020-09-24 15:09:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:09:29,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 504 [2020-09-24 15:09:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:29,283 INFO L225 Difference]: With dead ends: 561 [2020-09-24 15:09:29,283 INFO L226 Difference]: Without dead ends: 536 [2020-09-24 15:09:29,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-24 15:09:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-24 15:09:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-24 15:09:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-24 15:09:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 523 transitions. [2020-09-24 15:09:29,299 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 523 transitions. Word has length 504 [2020-09-24 15:09:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:29,300 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 523 transitions. [2020-09-24 15:09:29,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 15:09:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 523 transitions. [2020-09-24 15:09:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-09-24 15:09:29,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:29,304 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:29,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:09:29,304 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash 824442507, now seen corresponding path program 12 times [2020-09-24 15:09:29,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:29,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623108392] [2020-09-24 15:09:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 60 proven. 1182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:30,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623108392] [2020-09-24 15:09:30,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:30,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 15:09:30,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015777731] [2020-09-24 15:09:30,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 15:09:30,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:30,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 15:09:30,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:09:30,234 INFO L87 Difference]: Start difference. First operand 522 states and 523 transitions. Second operand 17 states. [2020-09-24 15:09:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:32,934 INFO L93 Difference]: Finished difference Result 578 states and 581 transitions. [2020-09-24 15:09:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 15:09:32,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 521 [2020-09-24 15:09:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:32,938 INFO L225 Difference]: With dead ends: 578 [2020-09-24 15:09:32,938 INFO L226 Difference]: Without dead ends: 553 [2020-09-24 15:09:32,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-09-24 15:09:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-09-24 15:09:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 539. [2020-09-24 15:09:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-09-24 15:09:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 540 transitions. [2020-09-24 15:09:32,956 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 540 transitions. Word has length 521 [2020-09-24 15:09:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:32,957 INFO L479 AbstractCegarLoop]: Abstraction has 539 states and 540 transitions. [2020-09-24 15:09:32,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 15:09:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 540 transitions. [2020-09-24 15:09:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-09-24 15:09:32,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:32,961 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:32,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 15:09:32,962 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1686815299, now seen corresponding path program 13 times [2020-09-24 15:09:32,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:32,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109352698] [2020-09-24 15:09:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:33,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:33,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109352698] [2020-09-24 15:09:33,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:33,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 15:09:33,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214694828] [2020-09-24 15:09:33,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 15:09:33,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:33,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 15:09:33,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:09:33,922 INFO L87 Difference]: Start difference. First operand 539 states and 540 transitions. Second operand 18 states. [2020-09-24 15:09:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:36,861 INFO L93 Difference]: Finished difference Result 595 states and 598 transitions. [2020-09-24 15:09:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:09:36,866 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 538 [2020-09-24 15:09:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:36,869 INFO L225 Difference]: With dead ends: 595 [2020-09-24 15:09:36,870 INFO L226 Difference]: Without dead ends: 570 [2020-09-24 15:09:36,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 15:09:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-09-24 15:09:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2020-09-24 15:09:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-09-24 15:09:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 557 transitions. [2020-09-24 15:09:36,889 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 557 transitions. Word has length 538 [2020-09-24 15:09:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:36,890 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 557 transitions. [2020-09-24 15:09:36,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 15:09:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 557 transitions. [2020-09-24 15:09:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2020-09-24 15:09:36,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:36,895 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:36,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 15:09:36,896 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:36,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1214777547, now seen corresponding path program 14 times [2020-09-24 15:09:36,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:36,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804661705] [2020-09-24 15:09:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:37,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 70 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:37,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804661705] [2020-09-24 15:09:37,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:37,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 15:09:37,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760416799] [2020-09-24 15:09:37,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 15:09:37,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:37,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 15:09:37,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:09:37,881 INFO L87 Difference]: Start difference. First operand 556 states and 557 transitions. Second operand 19 states. [2020-09-24 15:09:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:41,131 INFO L93 Difference]: Finished difference Result 612 states and 615 transitions. [2020-09-24 15:09:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 15:09:41,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 555 [2020-09-24 15:09:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:41,135 INFO L225 Difference]: With dead ends: 612 [2020-09-24 15:09:41,137 INFO L226 Difference]: Without dead ends: 587 [2020-09-24 15:09:41,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 15:09:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-09-24 15:09:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 573. [2020-09-24 15:09:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-09-24 15:09:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 574 transitions. [2020-09-24 15:09:41,166 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 574 transitions. Word has length 555 [2020-09-24 15:09:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:41,167 INFO L479 AbstractCegarLoop]: Abstraction has 573 states and 574 transitions. [2020-09-24 15:09:41,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 15:09:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 574 transitions. [2020-09-24 15:09:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-09-24 15:09:41,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:41,171 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:41,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 15:09:41,172 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1275001725, now seen corresponding path program 15 times [2020-09-24 15:09:41,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:41,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999614774] [2020-09-24 15:09:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:41,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1935 backedges. 75 proven. 1860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:42,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999614774] [2020-09-24 15:09:42,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:42,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 15:09:42,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981028069] [2020-09-24 15:09:42,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 15:09:42,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:42,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 15:09:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-09-24 15:09:42,103 INFO L87 Difference]: Start difference. First operand 573 states and 574 transitions. Second operand 20 states. [2020-09-24 15:09:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:45,675 INFO L93 Difference]: Finished difference Result 629 states and 632 transitions. [2020-09-24 15:09:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 15:09:45,676 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 572 [2020-09-24 15:09:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:45,680 INFO L225 Difference]: With dead ends: 629 [2020-09-24 15:09:45,680 INFO L226 Difference]: Without dead ends: 604 [2020-09-24 15:09:45,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 15:09:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-24 15:09:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 590. [2020-09-24 15:09:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-09-24 15:09:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 591 transitions. [2020-09-24 15:09:45,702 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 591 transitions. Word has length 572 [2020-09-24 15:09:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:45,703 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 591 transitions. [2020-09-24 15:09:45,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 15:09:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 591 transitions. [2020-09-24 15:09:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-09-24 15:09:45,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:45,719 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:45,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 15:09:45,720 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1134984437, now seen corresponding path program 16 times [2020-09-24 15:09:45,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:45,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865661632] [2020-09-24 15:09:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 80 proven. 2120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:46,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865661632] [2020-09-24 15:09:46,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:46,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 15:09:46,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560989889] [2020-09-24 15:09:46,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 15:09:46,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 15:09:46,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:09:46,991 INFO L87 Difference]: Start difference. First operand 590 states and 591 transitions. Second operand 21 states. [2020-09-24 15:09:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:50,873 INFO L93 Difference]: Finished difference Result 646 states and 649 transitions. [2020-09-24 15:09:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:09:50,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 589 [2020-09-24 15:09:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:50,877 INFO L225 Difference]: With dead ends: 646 [2020-09-24 15:09:50,878 INFO L226 Difference]: Without dead ends: 621 [2020-09-24 15:09:50,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 15:09:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-09-24 15:09:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2020-09-24 15:09:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-09-24 15:09:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 608 transitions. [2020-09-24 15:09:50,897 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 608 transitions. Word has length 589 [2020-09-24 15:09:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:50,898 INFO L479 AbstractCegarLoop]: Abstraction has 607 states and 608 transitions. [2020-09-24 15:09:50,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 15:09:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 608 transitions. [2020-09-24 15:09:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-09-24 15:09:50,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:50,903 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:50,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 15:09:50,904 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1033287363, now seen corresponding path program 17 times [2020-09-24 15:09:50,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:50,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812361020] [2020-09-24 15:09:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:51,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2482 backedges. 85 proven. 2397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:51,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812361020] [2020-09-24 15:09:51,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:51,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 15:09:51,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912991490] [2020-09-24 15:09:51,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 15:09:51,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 15:09:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:09:51,985 INFO L87 Difference]: Start difference. First operand 607 states and 608 transitions. Second operand 22 states. [2020-09-24 15:09:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:56,184 INFO L93 Difference]: Finished difference Result 663 states and 666 transitions. [2020-09-24 15:09:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 15:09:56,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 606 [2020-09-24 15:09:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:56,192 INFO L225 Difference]: With dead ends: 663 [2020-09-24 15:09:56,192 INFO L226 Difference]: Without dead ends: 638 [2020-09-24 15:09:56,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 15:09:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-24 15:09:56,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 624. [2020-09-24 15:09:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-09-24 15:09:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 625 transitions. [2020-09-24 15:09:56,212 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 625 transitions. Word has length 606 [2020-09-24 15:09:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:56,213 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 625 transitions. [2020-09-24 15:09:56,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 15:09:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 625 transitions. [2020-09-24 15:09:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-09-24 15:09:56,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:56,218 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:56,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 15:09:56,219 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash -174297781, now seen corresponding path program 18 times [2020-09-24 15:09:56,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:56,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271954863] [2020-09-24 15:09:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat