/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 true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -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 [2020-09-25 14:48:33,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:48:33,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:48:33,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:48:33,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:48:33,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:48:33,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:48:33,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:48:33,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:48:34,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:48:34,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:48:34,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:48:34,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:48:34,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:48:34,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:48:34,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:48:34,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:48:34,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:48:34,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:48:34,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:48:34,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:48:34,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:48:34,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:48:34,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:48:34,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:48:34,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:48:34,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:48:34,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:48:34,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:48:34,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:48:34,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:48:34,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:48:34,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:48:34,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:48:34,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:48:34,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:48:34,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:48:34,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:48:34,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:48:34,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:48:34,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:48:34,063 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 [2020-09-25 14:48:34,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:48:34,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:48:34,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:48:34,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:48:34,092 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:48:34,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:48:34,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:48:34,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:48:34,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:48:34,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:48:34,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:48:34,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:48:34,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:48:34,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:48:34,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:48:34,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:48:34,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:48:34,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:48:34,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:48:34,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:48:34,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:48:34,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:48:34,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:48:34,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:48:34,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:48:34,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:48:34,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:48:34,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:48:34,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:48:34,098 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:48:34,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:48:34,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:48:34,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:48:34,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:48:34,675 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:48:34,676 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-25 14:48:34,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d55a4c8e/f4a4ef9095e842c8a2483da62ab8963c/FLAGfcc85704e [2020-09-25 14:48:35,399 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:48:35,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-25 14:48:35,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d55a4c8e/f4a4ef9095e842c8a2483da62ab8963c/FLAGfcc85704e [2020-09-25 14:48:35,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d55a4c8e/f4a4ef9095e842c8a2483da62ab8963c [2020-09-25 14:48:35,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:48:35,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:48:35,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:48:35,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:48:35,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:48:35,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:48:35" (1/1) ... [2020-09-25 14:48:35,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@257a0311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:35, skipping insertion in model container [2020-09-25 14:48:35,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:48:35" (1/1) ... [2020-09-25 14:48:35,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:48:35,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:48:36,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:48:36,268 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:48:36,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:48:36,373 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:48:36,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36 WrapperNode [2020-09-25 14:48:36,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:48:36,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:48:36,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:48:36,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:48:36,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (1/1) ... [2020-09-25 14:48:36,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (1/1) ... [2020-09-25 14:48:36,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (1/1) ... [2020-09-25 14:48:36,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (1/1) ... [2020-09-25 14:48:36,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (1/1) ... [2020-09-25 14:48:36,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (1/1) ... [2020-09-25 14:48:36,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (1/1) ... [2020-09-25 14:48:36,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:48:36,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:48:36,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:48:36,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:48:36,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (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 [2020-09-25 14:48:36,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:48:36,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:48:36,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:48:36,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:48:36,562 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-25 14:48:36,562 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-25 14:48:36,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:48:36,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 14:48:36,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 14:48:36,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 14:48:36,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 14:48:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-25 14:48:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 14:48:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:48:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:48:36,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 14:48:36,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 14:48:37,490 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:48:37,490 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:48:37,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:48:37 BoogieIcfgContainer [2020-09-25 14:48:37,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:48:37,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:48:37,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:48:37,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:48:37,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:48:35" (1/3) ... [2020-09-25 14:48:37,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188a1327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:48:37, skipping insertion in model container [2020-09-25 14:48:37,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:48:36" (2/3) ... [2020-09-25 14:48:37,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188a1327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:48:37, skipping insertion in model container [2020-09-25 14:48:37,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:48:37" (3/3) ... [2020-09-25 14:48:37,508 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-09-25 14:48:37,520 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:48:37,530 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:48:37,549 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:48:37,580 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:48:37,580 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:48:37,580 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:48:37,580 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:48:37,581 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:48:37,581 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:48:37,581 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:48:37,595 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:48:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states. [2020-09-25 14:48:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-25 14:48:37,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:48:37,646 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] [2020-09-25 14:48:37,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:48:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:48:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1533680843, now seen corresponding path program 1 times [2020-09-25 14:48:37,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:48:37,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856842344] [2020-09-25 14:48:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:48:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:38,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:39,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:39,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-25 14:48:39,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:48:39,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1153 [2020-09-25 14:48:39,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:39,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:39,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:48:39,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-09-25 14:48:39,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:48:39,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:48:39,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:48:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:39,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:39,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:39,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:48:39,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:48:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 14:48:39,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:39,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:39,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:48:39,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:48:39,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:48:39,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:48:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:48:39,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856842344] [2020-09-25 14:48:39,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:48:39,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 14:48:39,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066650864] [2020-09-25 14:48:39,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 14:48:39,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:48:39,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 14:48:39,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:48:39,903 INFO L87 Difference]: Start difference. First operand 348 states. Second operand 6 states. [2020-09-25 14:48:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:48:40,846 INFO L93 Difference]: Finished difference Result 386 states and 393 transitions. [2020-09-25 14:48:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 14:48:40,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2020-09-25 14:48:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:48:40,870 INFO L225 Difference]: With dead ends: 386 [2020-09-25 14:48:40,870 INFO L226 Difference]: Without dead ends: 349 [2020-09-25 14:48:40,875 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 [2020-09-25 14:48:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-25 14:48:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 330. [2020-09-25 14:48:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-25 14:48:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-09-25 14:48:40,958 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 317 [2020-09-25 14:48:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:48:40,961 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-09-25 14:48:40,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 14:48:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-09-25 14:48:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-25 14:48:40,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:48:40,970 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] [2020-09-25 14:48:40,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:48:40,970 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:48:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:48:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash 770044171, now seen corresponding path program 1 times [2020-09-25 14:48:40,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:48:40,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938789237] [2020-09-25 14:48:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:48:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:41,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:41,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-25 14:48:41,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:48:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-09-25 14:48:41,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:41,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:48:41,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-25 14:48:41,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:48:41,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:48:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:48:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:41,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:41,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:41,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:48:41,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:48:41,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 14:48:41,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:41,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:41,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:48:41,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:48:41,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:48:41,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:48:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:48:42,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938789237] [2020-09-25 14:48:42,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:48:42,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:48:42,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328994860] [2020-09-25 14:48:42,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:48:42,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:48:42,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:48:42,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:48:42,113 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 5 states. [2020-09-25 14:48:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:48:42,894 INFO L93 Difference]: Finished difference Result 374 states and 377 transitions. [2020-09-25 14:48:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:48:42,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-09-25 14:48:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:48:42,900 INFO L225 Difference]: With dead ends: 374 [2020-09-25 14:48:42,904 INFO L226 Difference]: Without dead ends: 349 [2020-09-25 14:48:42,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:48:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-25 14:48:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-09-25 14:48:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-09-25 14:48:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2020-09-25 14:48:42,944 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 317 [2020-09-25 14:48:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:48:42,946 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2020-09-25 14:48:42,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:48:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2020-09-25 14:48:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-25 14:48:42,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:48:42,960 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] [2020-09-25 14:48:42,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:48:42,961 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:48:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:48:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash -913925315, now seen corresponding path program 1 times [2020-09-25 14:48:42,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:48:42,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377553616] [2020-09-25 14:48:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:48:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:43,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:43,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:45,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:45,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-09-25 14:48:45,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:48:45,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2646 [2020-09-25 14:48:45,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:45,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:45,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:48:45,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-25 14:48:45,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 14:48:45,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:48:45,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:48:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:45,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:45,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:45,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:48:45,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:48:45,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 14:48:45,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:45,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:45,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:48:45,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:48:45,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:48:45,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:48:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:48:46,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377553616] [2020-09-25 14:48:46,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:48:46,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 14:48:46,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863613606] [2020-09-25 14:48:46,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 14:48:46,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:48:46,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 14:48:46,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:48:46,058 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 6 states. [2020-09-25 14:48:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:48:46,957 INFO L93 Difference]: Finished difference Result 391 states and 394 transitions. [2020-09-25 14:48:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 14:48:46,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-09-25 14:48:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:48:46,961 INFO L225 Difference]: With dead ends: 391 [2020-09-25 14:48:46,961 INFO L226 Difference]: Without dead ends: 366 [2020-09-25 14:48:46,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:48:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-09-25 14:48:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-09-25 14:48:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-25 14:48:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-09-25 14:48:46,988 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 334 [2020-09-25 14:48:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:48:46,989 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-09-25 14:48:46,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 14:48:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-09-25 14:48:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-09-25 14:48:46,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:48:46,998 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] [2020-09-25 14:48:46,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:48:46,998 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:48:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:48:46,999 INFO L82 PathProgramCache]: Analyzing trace with hash 646798155, now seen corresponding path program 2 times [2020-09-25 14:48:46,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:48:47,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418540241] [2020-09-25 14:48:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:48:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:47,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:47,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:52,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:52,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-09-25 14:48:52,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:48:52,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:48:52,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:52,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:52,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:48:52,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-25 14:48:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 14:48:52,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:48:52,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:48:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:52,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:52,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:52,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:48:52,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:48:52,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 14:48:52,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:52,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:52,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:48:52,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:48:52,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:48:52,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:48:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:48:52,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418540241] [2020-09-25 14:48:52,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:48:52,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 14:48:52,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702620666] [2020-09-25 14:48:52,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:48:52,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:48:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:48:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:48:52,421 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 7 states. [2020-09-25 14:48:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:48:53,381 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2020-09-25 14:48:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 14:48:53,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-09-25 14:48:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:48:53,386 INFO L225 Difference]: With dead ends: 408 [2020-09-25 14:48:53,386 INFO L226 Difference]: Without dead ends: 383 [2020-09-25 14:48:53,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:48:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-25 14:48:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-09-25 14:48:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-25 14:48:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2020-09-25 14:48:53,398 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 351 [2020-09-25 14:48:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:48:53,400 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2020-09-25 14:48:53,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:48:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2020-09-25 14:48:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-25 14:48:53,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:48:53,410 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] [2020-09-25 14:48:53,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:48:53,410 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:48:53,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:48:53,411 INFO L82 PathProgramCache]: Analyzing trace with hash -539428611, now seen corresponding path program 3 times [2020-09-25 14:48:53,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:48:53,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830472859] [2020-09-25 14:48:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:48:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:53,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:54,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:57,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:59,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:59,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-09-25 14:48:59,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:48:59,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5825 [2020-09-25 14:48:59,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:59,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:48:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-25 14:48:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 14:48:59,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:48:59,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:48:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:48:59,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:48:59,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:48:59,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:48:59,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:48:59,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 14:48:59,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:48:59,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:48:59,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:48:59,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:48:59,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:48:59,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:48:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:48:59,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830472859] [2020-09-25 14:48:59,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:48:59,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 14:48:59,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543605613] [2020-09-25 14:48:59,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 14:48:59,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:48:59,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 14:48:59,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:48:59,675 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 8 states. [2020-09-25 14:49:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:49:00,656 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2020-09-25 14:49:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 14:49:00,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-09-25 14:49:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:49:00,660 INFO L225 Difference]: With dead ends: 425 [2020-09-25 14:49:00,660 INFO L226 Difference]: Without dead ends: 400 [2020-09-25 14:49:00,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-25 14:49:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-25 14:49:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-09-25 14:49:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-25 14:49:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2020-09-25 14:49:00,675 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 368 [2020-09-25 14:49:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:49:00,676 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2020-09-25 14:49:00,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 14:49:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2020-09-25 14:49:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-09-25 14:49:00,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:49:00,684 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] [2020-09-25 14:49:00,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:49:00,685 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:49:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:49:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1425394293, now seen corresponding path program 4 times [2020-09-25 14:49:00,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:49:00,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873146568] [2020-09-25 14:49:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:49:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:01,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:06,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:06,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-09-25 14:49:06,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:49:06,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5885 [2020-09-25 14:49:06,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:06,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 14:49:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-25 14:49:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-25 14:49:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:49:06,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:49:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:06,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:06,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:06,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:49:06,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:49:06,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 14:49:06,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:06,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:49:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:49:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:49:06,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:49:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:49:07,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873146568] [2020-09-25 14:49:07,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:49:07,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 14:49:07,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582794709] [2020-09-25 14:49:07,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 14:49:07,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:49:07,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 14:49:07,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:49:07,083 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 9 states. [2020-09-25 14:49:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:49:08,149 INFO L93 Difference]: Finished difference Result 442 states and 445 transitions. [2020-09-25 14:49:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 14:49:08,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-09-25 14:49:08,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:49:08,154 INFO L225 Difference]: With dead ends: 442 [2020-09-25 14:49:08,154 INFO L226 Difference]: Without dead ends: 417 [2020-09-25 14:49:08,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-25 14:49:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-25 14:49:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-09-25 14:49:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-25 14:49:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-09-25 14:49:08,167 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 385 [2020-09-25 14:49:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:49:08,168 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-09-25 14:49:08,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 14:49:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-09-25 14:49:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-25 14:49:08,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:49:08,176 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] [2020-09-25 14:49:08,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 14:49:08,176 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:49:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:49:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1042028867, now seen corresponding path program 5 times [2020-09-25 14:49:08,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:49:08,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221455317] [2020-09-25 14:49:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:49:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:08,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:09,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:10,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:13,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:13,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-09-25 14:49:13,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:49:13,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:49:13,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:13,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:49:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-25 14:49:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-25 14:49:13,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:49:13,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:49:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:13,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:13,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:13,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:49:13,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:49:13,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 14:49:13,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:13,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:49:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:49:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:49:13,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:49:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:49:13,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221455317] [2020-09-25 14:49:13,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:49:13,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 14:49:13,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096084201] [2020-09-25 14:49:13,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 14:49:13,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:49:13,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 14:49:13,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 14:49:13,659 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 10 states. [2020-09-25 14:49:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:49:14,999 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2020-09-25 14:49:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 14:49:15,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-09-25 14:49:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:49:15,004 INFO L225 Difference]: With dead ends: 459 [2020-09-25 14:49:15,004 INFO L226 Difference]: Without dead ends: 434 [2020-09-25 14:49:15,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-25 14:49:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-25 14:49:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-25 14:49:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-25 14:49:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2020-09-25 14:49:15,027 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 402 [2020-09-25 14:49:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:49:15,029 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2020-09-25 14:49:15,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 14:49:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2020-09-25 14:49:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-25 14:49:15,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:49:15,035 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] [2020-09-25 14:49:15,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 14:49:15,035 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:49:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:49:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1509982155, now seen corresponding path program 6 times [2020-09-25 14:49:15,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:49:15,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070098635] [2020-09-25 14:49:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:49:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:15,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:16,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:17,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking...