/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 SequenceOfStatements --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_net_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 07:23:21,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 07:23:21,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 07:23:21,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 07:23:21,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 07:23:21,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 07:23:21,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 07:23:21,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 07:23:21,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 07:23:21,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 07:23:21,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 07:23:21,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 07:23:21,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 07:23:21,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 07:23:21,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 07:23:21,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 07:23:21,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 07:23:21,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 07:23:21,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 07:23:21,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 07:23:21,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 07:23:21,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 07:23:21,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 07:23:21,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 07:23:21,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 07:23:21,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 07:23:21,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 07:23:21,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 07:23:21,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 07:23:21,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 07:23:21,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 07:23:21,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 07:23:21,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 07:23:21,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 07:23:21,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 07:23:21,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 07:23:21,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 07:23:21,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 07:23:21,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 07:23:21,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 07:23:21,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 07:23:21,379 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 [2020-10-14 07:23:21,412 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 07:23:21,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 07:23:21,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 07:23:21,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 07:23:21,417 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 07:23:21,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 07:23:21,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 07:23:21,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 07:23:21,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 07:23:21,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 07:23:21,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 07:23:21,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 07:23:21,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 07:23:21,420 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 07:23:21,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 07:23:21,421 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 07:23:21,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 07:23:21,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 07:23:21,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 07:23:21,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 07:23:21,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 07:23:21,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 07:23:21,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 07:23:21,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 07:23:21,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 07:23:21,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 07:23:21,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 07:23:21,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 07:23:21,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 07:23:21,425 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 -> SequenceOfStatements 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 07:23:21,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 07:23:21,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 07:23:21,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 07:23:21,782 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 07:23:21,783 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 07:23:21,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_net_1.c [2020-10-14 07:23:21,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a4f4f6b/20fff03d70204e9ca7a5831156c02467/FLAG55b4b6a17 [2020-10-14 07:23:23,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 07:23:23,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_net_1.c [2020-10-14 07:23:23,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a4f4f6b/20fff03d70204e9ca7a5831156c02467/FLAG55b4b6a17 [2020-10-14 07:23:23,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a4f4f6b/20fff03d70204e9ca7a5831156c02467 [2020-10-14 07:23:23,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 07:23:23,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 07:23:23,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 07:23:23,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 07:23:23,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 07:23:23,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:23:23" (1/1) ... [2020-10-14 07:23:23,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:23, skipping insertion in model container [2020-10-14 07:23:23,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:23:23" (1/1) ... [2020-10-14 07:23:23,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 07:23:24,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 07:23:26,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 07:23:26,323 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 07:23:28,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 07:23:28,031 INFO L208 MainTranslator]: Completed translation [2020-10-14 07:23:28,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28 WrapperNode [2020-10-14 07:23:28,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 07:23:28,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 07:23:28,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 07:23:28,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 07:23:28,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (1/1) ... [2020-10-14 07:23:28,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (1/1) ... [2020-10-14 07:23:28,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (1/1) ... [2020-10-14 07:23:28,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (1/1) ... [2020-10-14 07:23:28,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (1/1) ... [2020-10-14 07:23:29,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (1/1) ... [2020-10-14 07:23:29,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (1/1) ... [2020-10-14 07:23:29,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 07:23:29,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 07:23:29,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 07:23:29,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 07:23:29,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (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 [2020-10-14 07:23:29,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 07:23:29,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 07:23:29,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 07:23:29,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 07:23:29,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 07:23:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 07:23:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 07:23:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 07:23:49,731 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 07:23:49,732 INFO L295 CfgBuilder]: Removed 1130 assume(true) statements. [2020-10-14 07:23:49,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:23:49 BoogieIcfgContainer [2020-10-14 07:23:49,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 07:23:49,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 07:23:49,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 07:23:49,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 07:23:49,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:23:23" (1/3) ... [2020-10-14 07:23:49,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5ae3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:23:49, skipping insertion in model container [2020-10-14 07:23:49,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28" (2/3) ... [2020-10-14 07:23:49,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5ae3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:23:49, skipping insertion in model container [2020-10-14 07:23:49,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:23:49" (3/3) ... [2020-10-14 07:23:49,775 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2020-10-14 07:23:49,788 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 07:23:49,803 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 07:23:49,825 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 07:23:49,898 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 07:23:49,899 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 07:23:49,899 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 07:23:49,899 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 07:23:49,900 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 07:23:49,900 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 07:23:49,900 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 07:23:49,900 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 07:23:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states. [2020-10-14 07:23:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 07:23:50,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:23:50,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:23:50,052 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:23:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:23:50,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2089661630, now seen corresponding path program 1 times [2020-10-14 07:23:50,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:23:50,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020608023] [2020-10-14 07:23:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:23:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:23:50,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:23:50,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:23:50,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 07:23:50,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:23:50,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-14 07:23:50,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:23:50,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:23:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:23:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:23:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:23:50,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 07:23:50,881 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 07:23:50,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:23:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:23:50,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:23:50,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:23:50,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 07:23:50,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:23:50,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-14 07:23:50,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:23:50,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:23:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:23:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:23:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:23:50,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:23:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:23:50,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020608023] [2020-10-14 07:23:50,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:23:50,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 07:23:50,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399027156] [2020-10-14 07:23:50,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 07:23:50,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:23:50,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 07:23:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 07:23:50,982 INFO L87 Difference]: Start difference. First operand 9216 states. Second operand 3 states. [2020-10-14 07:23:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:23:51,682 INFO L93 Difference]: Finished difference Result 17704 states and 35386 transitions. [2020-10-14 07:23:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 07:23:51,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-14 07:23:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:23:51,747 INFO L225 Difference]: With dead ends: 17704 [2020-10-14 07:23:51,747 INFO L226 Difference]: Without dead ends: 8284 [2020-10-14 07:23:51,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 07:23:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2020-10-14 07:23:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2020-10-14 07:23:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8284 states. [2020-10-14 07:23:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 13001 transitions. [2020-10-14 07:23:52,078 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 13001 transitions. Word has length 13 [2020-10-14 07:23:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:23:52,079 INFO L479 AbstractCegarLoop]: Abstraction has 8284 states and 13001 transitions. [2020-10-14 07:23:52,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 07:23:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 13001 transitions. [2020-10-14 07:23:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 07:23:52,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:23:52,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:23:52,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 07:23:52,081 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:23:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:23:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash 886062589, now seen corresponding path program 1 times [2020-10-14 07:23:52,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:23:52,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465109465] [2020-10-14 07:23:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:23:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:23:52,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:23:52,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:23:52,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:23:52,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 07:23:52,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:23:52,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-14 07:23:52,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:23:52,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:23:52,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:23:52,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 07:23:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 07:23:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:23:52,539 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 07:23:52,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:23:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:23:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:23:52,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:23:52,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 07:23:52,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:23:52,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 07:23:52,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:23:52,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:23:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:23:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:23:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:23:52,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:23:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:23:52,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465109465] [2020-10-14 07:23:52,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:23:52,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 07:23:52,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025081706] [2020-10-14 07:23:52,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 07:23:52,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:23:52,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 07:23:52,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 07:23:52,577 INFO L87 Difference]: Start difference. First operand 8284 states and 13001 transitions. Second operand 4 states. [2020-10-14 07:23:52,769 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 07:24:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:24:36,974 INFO L93 Difference]: Finished difference Result 16606 states and 26082 transitions. [2020-10-14 07:24:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 07:24:36,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 07:24:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:24:37,021 INFO L225 Difference]: With dead ends: 16606 [2020-10-14 07:24:37,021 INFO L226 Difference]: Without dead ends: 8328 [2020-10-14 07:24:37,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:24:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8328 states. [2020-10-14 07:24:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8328 to 8328. [2020-10-14 07:24:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8328 states. [2020-10-14 07:24:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8328 states to 8328 states and 13046 transitions. [2020-10-14 07:24:37,237 INFO L78 Accepts]: Start accepts. Automaton has 8328 states and 13046 transitions. Word has length 14 [2020-10-14 07:24:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:24:37,238 INFO L479 AbstractCegarLoop]: Abstraction has 8328 states and 13046 transitions. [2020-10-14 07:24:37,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 07:24:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 8328 states and 13046 transitions. [2020-10-14 07:24:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 07:24:37,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:24:37,240 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:24:37,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 07:24:37,241 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:24:37,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:24:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1585116607, now seen corresponding path program 1 times [2020-10-14 07:24:37,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:24:37,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552775732] [2020-10-14 07:24:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:24:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:24:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:24:37,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:24:37,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 07:24:37,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:24:37,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-14 07:24:37,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:24:37,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:24:37,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:24:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:24:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 07:24:37,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:24:37,643 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 07:24:37,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:24:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:24:37,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:24:37,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:24:37,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 07:24:37,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:24:37,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-14 07:24:37,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:24:37,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:24:37,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:24:37,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:24:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:24:37,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:24:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:24:37,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552775732] [2020-10-14 07:24:37,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:24:37,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 07:24:37,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201500469] [2020-10-14 07:24:37,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 07:24:37,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:24:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 07:24:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 07:24:37,713 INFO L87 Difference]: Start difference. First operand 8328 states and 13046 transitions. Second operand 4 states. [2020-10-14 07:24:37,977 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 07:24:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:24:43,641 INFO L93 Difference]: Finished difference Result 16543 states and 25934 transitions. [2020-10-14 07:24:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 07:24:43,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 07:24:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:24:43,682 INFO L225 Difference]: With dead ends: 16543 [2020-10-14 07:24:43,683 INFO L226 Difference]: Without dead ends: 8221 [2020-10-14 07:24:43,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:24:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8221 states. [2020-10-14 07:24:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8221 to 8221. [2020-10-14 07:24:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8221 states. [2020-10-14 07:24:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8221 states to 8221 states and 12892 transitions. [2020-10-14 07:24:43,847 INFO L78 Accepts]: Start accepts. Automaton has 8221 states and 12892 transitions. Word has length 19 [2020-10-14 07:24:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:24:43,848 INFO L479 AbstractCegarLoop]: Abstraction has 8221 states and 12892 transitions. [2020-10-14 07:24:43,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 07:24:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8221 states and 12892 transitions. [2020-10-14 07:24:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 07:24:43,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:24:43,852 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:24:43,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 07:24:43,852 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:24:43,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:24:43,853 INFO L82 PathProgramCache]: Analyzing trace with hash -90884306, now seen corresponding path program 1 times [2020-10-14 07:24:43,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:24:43,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356261752] [2020-10-14 07:24:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:24:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:24:43,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:24:44,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:24:44,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 07:24:44,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:24:44,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-14 07:24:44,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:24:44,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:24:44,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:24:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:24:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 07:24:44,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 07:24:44,296 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 07:24:44,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:24:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:24:44,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:24:44,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:24:44,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 07:24:44,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:24:44,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 07:24:44,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:24:44,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:24:44,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:24:44,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:24:44,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:24:44,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 07:24:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:24:44,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356261752] [2020-10-14 07:24:44,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:24:44,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 07:24:44,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899826240] [2020-10-14 07:24:44,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 07:24:44,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:24:44,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 07:24:44,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 07:24:44,340 INFO L87 Difference]: Start difference. First operand 8221 states and 12892 transitions. Second operand 4 states. [2020-10-14 07:24:44,559 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 07:24:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:24:56,936 INFO L93 Difference]: Finished difference Result 16309 states and 25609 transitions. [2020-10-14 07:24:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 07:24:56,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-14 07:24:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:24:56,958 INFO L225 Difference]: With dead ends: 16309 [2020-10-14 07:24:56,958 INFO L226 Difference]: Without dead ends: 8101 [2020-10-14 07:24:56,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:24:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2020-10-14 07:24:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 8101. [2020-10-14 07:24:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8101 states. [2020-10-14 07:24:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 12272 transitions. [2020-10-14 07:24:57,147 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 12272 transitions. Word has length 23 [2020-10-14 07:24:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:24:57,149 INFO L479 AbstractCegarLoop]: Abstraction has 8101 states and 12272 transitions. [2020-10-14 07:24:57,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 07:24:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 12272 transitions. [2020-10-14 07:24:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 07:24:57,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:24:57,160 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 07:24:57,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 07:24:57,161 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:24:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:24:57,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2991053, now seen corresponding path program 1 times [2020-10-14 07:24:57,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:24:57,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011848091] [2020-10-14 07:24:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:24:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:24:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:24:57,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:24:57,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:24:57,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 07:24:57,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:24:57,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-14 07:24:57,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:24:57,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:24:57,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:24:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:24:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 07:24:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:24:57,712 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 07:24:57,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:24:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:24:57,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:24:57,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:24:57,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 07:24:57,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:24:57,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 07:24:57,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:24:57,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:24:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:24:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:24:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:24:57,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:24:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:24:57,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011848091] [2020-10-14 07:24:57,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:24:57,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 07:24:57,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609189717] [2020-10-14 07:24:57,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 07:24:57,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:24:57,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 07:24:57,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 07:24:57,744 INFO L87 Difference]: Start difference. First operand 8101 states and 12272 transitions. Second operand 4 states. [2020-10-14 07:24:57,966 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 07:25:39,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:39,513 INFO L93 Difference]: Finished difference Result 16195 states and 24574 transitions. [2020-10-14 07:25:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 07:25:39,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-14 07:25:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:39,535 INFO L225 Difference]: With dead ends: 16195 [2020-10-14 07:25:39,535 INFO L226 Difference]: Without dead ends: 8147 [2020-10-14 07:25:39,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:25:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8147 states. [2020-10-14 07:25:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8147 to 8145. [2020-10-14 07:25:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8145 states. [2020-10-14 07:25:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8145 states to 8145 states and 12317 transitions. [2020-10-14 07:25:39,677 INFO L78 Accepts]: Start accepts. Automaton has 8145 states and 12317 transitions. Word has length 26 [2020-10-14 07:25:39,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:39,677 INFO L479 AbstractCegarLoop]: Abstraction has 8145 states and 12317 transitions. [2020-10-14 07:25:39,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 07:25:39,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8145 states and 12317 transitions. [2020-10-14 07:25:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 07:25:39,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:39,678 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 07:25:39,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 07:25:39,679 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:39,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1847963214, now seen corresponding path program 1 times [2020-10-14 07:25:39,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:39,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369603753] [2020-10-14 07:25:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:39,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:39,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 07:25:39,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:39,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-14 07:25:39,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:39,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:39,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:25:39,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:25:39,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 07:25:39,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 07:25:40,055 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 07:25:40,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:40,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:40,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:40,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 07:25:40,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:40,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 07:25:40,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:40,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:40,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:40,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:25:40,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369603753] [2020-10-14 07:25:40,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:25:40,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 07:25:40,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646973753] [2020-10-14 07:25:40,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 07:25:40,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 07:25:40,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 07:25:40,085 INFO L87 Difference]: Start difference. First operand 8145 states and 12317 transitions. Second operand 4 states. [2020-10-14 07:25:40,292 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 07:26:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:26:30,029 INFO L93 Difference]: Finished difference Result 24329 states and 36841 transitions. [2020-10-14 07:26:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 07:26:30,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-14 07:26:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:26:30,066 INFO L225 Difference]: With dead ends: 24329 [2020-10-14 07:26:30,067 INFO L226 Difference]: Without dead ends: 16189 [2020-10-14 07:26:30,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:26:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16189 states. [2020-10-14 07:26:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16189 to 14931. [2020-10-14 07:26:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14931 states. [2020-10-14 07:26:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14931 states to 14931 states and 23170 transitions. [2020-10-14 07:26:30,361 INFO L78 Accepts]: Start accepts. Automaton has 14931 states and 23170 transitions. Word has length 27 [2020-10-14 07:26:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:26:30,361 INFO L479 AbstractCegarLoop]: Abstraction has 14931 states and 23170 transitions. [2020-10-14 07:26:30,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 07:26:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 14931 states and 23170 transitions. [2020-10-14 07:26:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 07:26:30,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:26:30,363 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 07:26:30,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 07:26:30,363 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:26:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:26:30,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1901804161, now seen corresponding path program 1 times [2020-10-14 07:26:30,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:26:30,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608137944] [2020-10-14 07:26:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:26:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:26:30,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:26:30,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:26:30,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 07:26:30,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:26:30,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-14 07:26:30,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:26:30,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:26:30,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:26:30,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:26:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 07:26:30,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 07:26:30,763 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 07:26:30,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:26:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:26:30,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:26:30,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:26:30,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 07:26:30,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:26:30,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 07:26:30,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:26:30,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:26:30,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:26:30,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:26:30,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:26:30,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 07:26:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:26:30,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608137944] [2020-10-14 07:26:30,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:26:30,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 07:26:30,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692156589] [2020-10-14 07:26:30,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 07:26:30,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:26:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 07:26:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 07:26:30,793 INFO L87 Difference]: Start difference. First operand 14931 states and 23170 transitions. Second operand 4 states. [2020-10-14 07:26:31,003 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-14 07:27:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:27:24,173 INFO L93 Difference]: Finished difference Result 37581 states and 58155 transitions. [2020-10-14 07:27:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 07:27:24,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-14 07:27:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:27:24,204 INFO L225 Difference]: With dead ends: 37581 [2020-10-14 07:27:24,205 INFO L226 Difference]: Without dead ends: 22431 [2020-10-14 07:27:24,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:27:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22431 states. [2020-10-14 07:27:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22431 to 21237. [2020-10-14 07:27:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21237 states. [2020-10-14 07:27:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21237 states to 21237 states and 32853 transitions. [2020-10-14 07:27:24,610 INFO L78 Accepts]: Start accepts. Automaton has 21237 states and 32853 transitions. Word has length 29 [2020-10-14 07:27:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:27:24,612 INFO L479 AbstractCegarLoop]: Abstraction has 21237 states and 32853 transitions. [2020-10-14 07:27:24,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 07:27:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 21237 states and 32853 transitions. [2020-10-14 07:27:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 07:27:24,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:27:24,614 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 07:27:24,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 07:27:24,614 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:27:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:27:24,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1134426699, now seen corresponding path program 1 times [2020-10-14 07:27:24,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:27:24,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037717676] [2020-10-14 07:27:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:27:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:27:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:27:24,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:27:24,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 07:27:24,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:27:24,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-14 07:27:24,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:27:24,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:27:24,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:27:24,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:27:24,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 07:27:24,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:27:25,020 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 07:27:25,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:27:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:27:25,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:27:25,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:27:25,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 07:27:25,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:27:25,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 07:27:25,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:27:25,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:27:25,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:27:25,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:27:25,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:27:25,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 07:27:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:27:25,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037717676] [2020-10-14 07:27:25,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:27:25,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 07:27:25,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56452475] [2020-10-14 07:27:25,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 07:27:25,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:27:25,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 07:27:25,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 07:27:25,051 INFO L87 Difference]: Start difference. First operand 21237 states and 32853 transitions. Second operand 4 states. [2020-10-14 07:27:25,254 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 174