/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/eca-rers2012/Problem13_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 21:30:33,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 21:30:33,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 21:30:33,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 21:30:33,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 21:30:33,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 21:30:33,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 21:30:33,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 21:30:33,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 21:30:33,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 21:30:33,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 21:30:33,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 21:30:33,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 21:30:33,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 21:30:33,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 21:30:33,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 21:30:33,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 21:30:33,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 21:30:33,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 21:30:33,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 21:30:33,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 21:30:33,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 21:30:33,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 21:30:33,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 21:30:33,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 21:30:33,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 21:30:33,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 21:30:33,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 21:30:33,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 21:30:33,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 21:30:33,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 21:30:33,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 21:30:33,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 21:30:33,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 21:30:33,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 21:30:33,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 21:30:33,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 21:30:33,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 21:30:33,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 21:30:33,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 21:30:33,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 21:30:33,465 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 21:30:33,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 21:30:33,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 21:30:33,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 21:30:33,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 21:30:33,505 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 21:30:33,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 21:30:33,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 21:30:33,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 21:30:33,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 21:30:33,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 21:30:33,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 21:30:33,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 21:30:33,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 21:30:33,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 21:30:33,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 21:30:33,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 21:30:33,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 21:30:33,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 21:30:33,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 21:30:33,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 21:30:33,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 21:30:33,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 21:30:33,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 21:30:33,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 21:30:33,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 21:30:33,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 21:30:33,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 21:30:33,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 21:30:33,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 21:30:33,511 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 21:30:33,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 21:30:33,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 21:30:33,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 21:30:33,973 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 21:30:33,973 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 21:30:33,974 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label35.c [2020-10-14 21:30:34,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5f240576/191152b5544a480ebbf4e863125dc552/FLAG6520404e6 [2020-10-14 21:30:34,967 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 21:30:34,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label35.c [2020-10-14 21:30:35,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5f240576/191152b5544a480ebbf4e863125dc552/FLAG6520404e6 [2020-10-14 21:30:35,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5f240576/191152b5544a480ebbf4e863125dc552 [2020-10-14 21:30:35,485 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 21:30:35,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 21:30:35,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 21:30:35,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 21:30:35,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 21:30:35,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:30:35" (1/1) ... [2020-10-14 21:30:35,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:35, skipping insertion in model container [2020-10-14 21:30:35,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:30:35" (1/1) ... [2020-10-14 21:30:35,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 21:30:35,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 21:30:37,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:30:37,713 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 21:30:38,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:30:38,615 INFO L208 MainTranslator]: Completed translation [2020-10-14 21:30:38,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38 WrapperNode [2020-10-14 21:30:38,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 21:30:38,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 21:30:38,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 21:30:38,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 21:30:38,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (1/1) ... [2020-10-14 21:30:38,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (1/1) ... [2020-10-14 21:30:38,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (1/1) ... [2020-10-14 21:30:38,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (1/1) ... [2020-10-14 21:30:38,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (1/1) ... [2020-10-14 21:30:38,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (1/1) ... [2020-10-14 21:30:38,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (1/1) ... [2020-10-14 21:30:38,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 21:30:38,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 21:30:38,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 21:30:38,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 21:30:38,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (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 21:30:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 21:30:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 21:30:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 21:30:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 21:30:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 21:30:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 21:30:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 21:30:38,982 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 21:30:38,982 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 21:30:38,982 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 21:30:38,982 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 21:30:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 21:30:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 21:30:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 21:30:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 21:30:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 21:30:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 21:30:51,425 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 21:30:51,426 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 21:30:51,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:30:51 BoogieIcfgContainer [2020-10-14 21:30:51,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 21:30:51,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 21:30:51,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 21:30:51,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 21:30:51,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:30:35" (1/3) ... [2020-10-14 21:30:51,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b5c98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:30:51, skipping insertion in model container [2020-10-14 21:30:51,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:30:38" (2/3) ... [2020-10-14 21:30:51,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b5c98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:30:51, skipping insertion in model container [2020-10-14 21:30:51,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:30:51" (3/3) ... [2020-10-14 21:30:51,465 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label35.c [2020-10-14 21:30:51,481 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 21:30:51,495 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 21:30:51,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 21:30:51,560 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 21:30:51,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 21:30:51,561 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 21:30:51,561 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 21:30:51,561 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 21:30:51,561 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 21:30:51,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 21:30:51,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 21:30:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-14 21:30:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 21:30:51,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:30:51,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:30:51,632 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:30:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:30:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1424206575, now seen corresponding path program 1 times [2020-10-14 21:30:51,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:30:51,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165379564] [2020-10-14 21:30:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:30:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:30:51,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:52,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:30:52,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 21:30:52,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:30:52,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-14 21:30:52,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:30:52,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:30:52,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:30:52,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:30:52,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 21:30:52,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 21:30:52,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:30:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:30:52,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:52,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:30:52,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:30:52,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:30:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-14 21:30:52,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:30:52,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:30:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:30:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:30:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:30:52,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:30:52,425 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 21:30:52,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165379564] [2020-10-14 21:30:52,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:30:52,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 21:30:52,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85980716] [2020-10-14 21:30:52,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 21:30:52,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:30:52,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 21:30:52,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 21:30:52,464 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-14 21:31:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:31:07,608 INFO L93 Difference]: Finished difference Result 3152 states and 5831 transitions. [2020-10-14 21:31:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:31:07,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 21:31:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:31:07,646 INFO L225 Difference]: With dead ends: 3152 [2020-10-14 21:31:07,647 INFO L226 Difference]: Without dead ends: 1954 [2020-10-14 21:31:07,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 21:31:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-10-14 21:31:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1885. [2020-10-14 21:31:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-14 21:31:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3103 transitions. [2020-10-14 21:31:07,832 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3103 transitions. Word has length 16 [2020-10-14 21:31:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:31:07,833 INFO L479 AbstractCegarLoop]: Abstraction has 1885 states and 3103 transitions. [2020-10-14 21:31:07,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 21:31:07,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3103 transitions. [2020-10-14 21:31:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 21:31:07,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:31:07,840 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] [2020-10-14 21:31:07,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 21:31:07,840 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:31:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:31:07,842 INFO L82 PathProgramCache]: Analyzing trace with hash -811846266, now seen corresponding path program 1 times [2020-10-14 21:31:07,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:31:07,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400849139] [2020-10-14 21:31:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:31:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:08,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:08,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:08,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 21:31:08,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:31:08,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-14 21:31:08,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:08,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:08,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:31:08,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:31:08,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 21:31:08,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:31:08,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:31:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:08,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:08,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:08,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:31:08,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:31:08,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 21:31:08,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:08,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:08,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:31:08,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:31:08,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:31:08,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:31:08,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:31:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:08,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:09,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:09,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 21:31:09,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:31:09,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-14 21:31:09,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:09,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:31:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:31:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 21:31:09,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:31:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:31:09,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400849139] [2020-10-14 21:31:09,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:31:09,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:31:09,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351546616] [2020-10-14 21:31:09,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:31:09,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:31:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:31:09,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:31:09,145 INFO L87 Difference]: Start difference. First operand 1885 states and 3103 transitions. Second operand 7 states. [2020-10-14 21:31:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:31:28,571 INFO L93 Difference]: Finished difference Result 5685 states and 9354 transitions. [2020-10-14 21:31:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 21:31:28,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-10-14 21:31:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:31:28,597 INFO L225 Difference]: With dead ends: 5685 [2020-10-14 21:31:28,597 INFO L226 Difference]: Without dead ends: 3806 [2020-10-14 21:31:28,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:31:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2020-10-14 21:31:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3717. [2020-10-14 21:31:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3717 states. [2020-10-14 21:31:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5599 transitions. [2020-10-14 21:31:28,735 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5599 transitions. Word has length 86 [2020-10-14 21:31:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:31:28,736 INFO L479 AbstractCegarLoop]: Abstraction has 3717 states and 5599 transitions. [2020-10-14 21:31:28,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:31:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5599 transitions. [2020-10-14 21:31:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 21:31:28,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:31:28,742 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] [2020-10-14 21:31:28,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 21:31:28,743 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:31:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:31:28,743 INFO L82 PathProgramCache]: Analyzing trace with hash 492188075, now seen corresponding path program 1 times [2020-10-14 21:31:28,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:31:28,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279007527] [2020-10-14 21:31:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:31:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:28,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:29,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:29,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:29,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 21:31:29,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:31:29,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-14 21:31:29,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:29,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:31:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:31:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 21:31:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:31:29,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:31:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:29,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:29,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:29,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:31:29,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:31:29,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 21:31:29,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:29,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:31:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:31:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:31:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:31:29,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:31:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:29,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:30,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:30,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 21:31:30,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:31:30,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-14 21:31:30,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:30,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:30,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:31:30,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:31:30,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 21:31:30,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:31:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:31:30,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279007527] [2020-10-14 21:31:30,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:31:30,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:31:30,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658763056] [2020-10-14 21:31:30,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:31:30,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:31:30,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:31:30,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:31:30,422 INFO L87 Difference]: Start difference. First operand 3717 states and 5599 transitions. Second operand 7 states. [2020-10-14 21:31:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:31:50,999 INFO L93 Difference]: Finished difference Result 11087 states and 17233 transitions. [2020-10-14 21:31:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 21:31:51,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-10-14 21:31:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:31:51,063 INFO L225 Difference]: With dead ends: 11087 [2020-10-14 21:31:51,063 INFO L226 Difference]: Without dead ends: 7376 [2020-10-14 21:31:51,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-14 21:31:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2020-10-14 21:31:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 7172. [2020-10-14 21:31:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7172 states. [2020-10-14 21:31:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7172 states to 7172 states and 10048 transitions. [2020-10-14 21:31:51,354 INFO L78 Accepts]: Start accepts. Automaton has 7172 states and 10048 transitions. Word has length 91 [2020-10-14 21:31:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:31:51,357 INFO L479 AbstractCegarLoop]: Abstraction has 7172 states and 10048 transitions. [2020-10-14 21:31:51,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:31:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7172 states and 10048 transitions. [2020-10-14 21:31:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 21:31:51,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:31:51,372 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] [2020-10-14 21:31:51,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 21:31:51,372 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:31:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:31:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash -887986905, now seen corresponding path program 1 times [2020-10-14 21:31:51,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:31:51,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412465846] [2020-10-14 21:31:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:31:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:51,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:52,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:52,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:52,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 21:31:52,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:31:52,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-14 21:31:52,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:52,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:31:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:31:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 21:31:52,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:31:52,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:31:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:52,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:52,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:31:52,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:31:52,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 21:31:52,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:52,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:52,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:31:52,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:31:52,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:31:52,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:31:52,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:31:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:31:52,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:31:52,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:31:52,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 21:31:52,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:31:52,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-14 21:31:52,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:31:52,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:31:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:31:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:31:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 21:31:52,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:31:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:31:52,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412465846] [2020-10-14 21:31:52,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:31:52,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:31:52,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810627240] [2020-10-14 21:31:52,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:31:52,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:31:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:31:52,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:31:52,920 INFO L87 Difference]: Start difference. First operand 7172 states and 10048 transitions. Second operand 7 states. [2020-10-14 21:32:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:32:17,334 INFO L93 Difference]: Finished difference Result 15909 states and 23226 transitions. [2020-10-14 21:32:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:32:17,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-10-14 21:32:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:32:17,378 INFO L225 Difference]: With dead ends: 15909 [2020-10-14 21:32:17,378 INFO L226 Difference]: Without dead ends: 8743 [2020-10-14 21:32:17,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:32:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8743 states. [2020-10-14 21:32:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8743 to 8336. [2020-10-14 21:32:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8336 states. [2020-10-14 21:32:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8336 states to 8336 states and 11003 transitions. [2020-10-14 21:32:17,633 INFO L78 Accepts]: Start accepts. Automaton has 8336 states and 11003 transitions. Word has length 93 [2020-10-14 21:32:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:32:17,634 INFO L479 AbstractCegarLoop]: Abstraction has 8336 states and 11003 transitions. [2020-10-14 21:32:17,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:32:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8336 states and 11003 transitions. [2020-10-14 21:32:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 21:32:17,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:32:17,646 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] [2020-10-14 21:32:17,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 21:32:17,651 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:32:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:32:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1037709383, now seen corresponding path program 1 times [2020-10-14 21:32:17,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:32:17,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257973262] [2020-10-14 21:32:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:32:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:32:17,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:17,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:18,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:32:18,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 21:32:18,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:32:18,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1304 [2020-10-14 21:32:18,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:32:18,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:32:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:32:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:32:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-14 21:32:18,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:32:19,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:32:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:32:19,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:19,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:32:19,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:32:19,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:32:19,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:32:19,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:32:19,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:32:19,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:32:19,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:32:19,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:32:19,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:32:19,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:32:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:32:19,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:19,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:32:19,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 21:32:19,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:32:19,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-14 21:32:19,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:32:19,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:32:19,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:32:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:32:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 21:32:19,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 74 [2020-10-14 21:32:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:32:19,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257973262] [2020-10-14 21:32:19,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:32:19,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:32:19,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747880861] [2020-10-14 21:32:19,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:32:19,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:32:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:32:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:32:19,514 INFO L87 Difference]: Start difference. First operand 8336 states and 11003 transitions. Second operand 7 states. [2020-10-14 21:32:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:32:46,460 INFO L93 Difference]: Finished difference Result 16169 states and 21677 transitions. [2020-10-14 21:32:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 21:32:46,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-14 21:32:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:32:46,514 INFO L225 Difference]: With dead ends: 16169 [2020-10-14 21:32:46,514 INFO L226 Difference]: Without dead ends: 8642 [2020-10-14 21:32:46,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-14 21:32:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2020-10-14 21:32:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 8393. [2020-10-14 21:32:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8393 states. [2020-10-14 21:32:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8393 states to 8393 states and 11138 transitions. [2020-10-14 21:32:46,778 INFO L78 Accepts]: Start accepts. Automaton has 8393 states and 11138 transitions. Word has length 109 [2020-10-14 21:32:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:32:46,780 INFO L479 AbstractCegarLoop]: Abstraction has 8393 states and 11138 transitions. [2020-10-14 21:32:46,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:32:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 8393 states and 11138 transitions. [2020-10-14 21:32:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 21:32:46,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:32:46,784 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] [2020-10-14 21:32:46,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 21:32:46,785 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:32:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:32:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash -683746667, now seen corresponding path program 1 times [2020-10-14 21:32:46,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:32:46,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103488867] [2020-10-14 21:32:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:32:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:32:46,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:46,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:47,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:32:47,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 21:32:47,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:32:47,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-14 21:32:47,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:32:47,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:32:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 21:32:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:32:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 21:32:47,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:32:47,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:32:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:32:47,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:47,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:32:47,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:32:47,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:32:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 21:32:47,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:32:47,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:32:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:32:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:32:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:32:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:32:47,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:32:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:32:47,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:32:47,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:32:47,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 21:32:47,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:32:47,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-14 21:32:47,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:32:47,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:32:47,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:32:47,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:32:47,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 21:32:47,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:32:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 21:32:47,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103488867] [2020-10-14 21:32:47,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:32:47,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 21:32:47,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263444458] [2020-10-14 21:32:47,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 21:32:47,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:32:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 21:32:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 21:32:47,893 INFO L87 Difference]: Start difference. First operand 8393 states and 11138 transitions. Second operand 6 states. [2020-10-14 21:33:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:33:15,601 INFO L93 Difference]: Finished difference Result 22346 states and 31255 transitions. [2020-10-14 21:33:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 21:33:15,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-10-14 21:33:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:33:15,670 INFO L225 Difference]: With dead ends: 22346 [2020-10-14 21:33:15,671 INFO L226 Difference]: Without dead ends: 14762 [2020-10-14 21:33:15,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 21:33:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14762 states. [2020-10-14 21:33:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14762 to 14565. [2020-10-14 21:33:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14565 states. [2020-10-14 21:33:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14565 states to 14565 states and 19610 transitions. [2020-10-14 21:33:17,000 INFO L78 Accepts]: Start accepts. Automaton has 14565 states and 19610 transitions. Word has length 116 [2020-10-14 21:33:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:33:17,001 INFO L479 AbstractCegarLoop]: Abstraction has 14565 states and 19610 transitions. [2020-10-14 21:33:17,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 21:33:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 14565 states and 19610 transitions. [2020-10-14 21:33:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-14 21:33:17,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:33:17,010 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 21:33:17,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 21:33:17,010 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:33:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:33:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -160300186, now seen corresponding path program 1 times [2020-10-14 21:33:17,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:33:17,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025796940] [2020-10-14 21:33:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:33:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:17,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:17,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:18,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:18,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-14 21:33:18,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:33:18,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1867 [2020-10-14 21:33:18,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:18,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:18,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 21:33:18,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:33:18,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-14 21:33:18,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:19,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:33:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:19,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:19,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:19,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:33:19,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:33:19,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:33:19,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:19,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:19,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:33:19,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:33:19,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:33:19,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:19,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:33:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:19,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:19,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:19,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:19,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 21:33:19,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:33:19,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-14 21:33:19,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:19,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:33:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:33:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-14 21:33:19,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:19,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-14 21:33:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:19,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:19,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:19,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 21:33:19,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:33:19,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-14 21:33:19,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:19,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:33:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:33:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 21:33:19,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 21:33:19,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025796940] [2020-10-14 21:33:19,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:33:19,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 21:33:19,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633207487] [2020-10-14 21:33:19,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:33:19,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:33:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:33:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:33:19,766 INFO L87 Difference]: Start difference. First operand 14565 states and 19610 transitions. Second operand 7 states. [2020-10-14 21:33:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:33:50,579 INFO L93 Difference]: Finished difference Result 41141 states and 59843 transitions. [2020-10-14 21:33:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:33:50,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2020-10-14 21:33:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:33:50,737 INFO L225 Difference]: With dead ends: 41141 [2020-10-14 21:33:50,737 INFO L226 Difference]: Without dead ends: 27385 [2020-10-14 21:33:50,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:33:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27385 states. [2020-10-14 21:33:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27385 to 27028. [2020-10-14 21:33:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27028 states. [2020-10-14 21:33:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27028 states to 27028 states and 35618 transitions. [2020-10-14 21:33:51,630 INFO L78 Accepts]: Start accepts. Automaton has 27028 states and 35618 transitions. Word has length 198 [2020-10-14 21:33:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:33:51,632 INFO L479 AbstractCegarLoop]: Abstraction has 27028 states and 35618 transitions. [2020-10-14 21:33:51,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:33:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 27028 states and 35618 transitions. [2020-10-14 21:33:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-14 21:33:51,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:33:51,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 21:33:51,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 21:33:51,643 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:33:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:33:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1097691129, now seen corresponding path program 1 times [2020-10-14 21:33:51,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:33:51,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279215277] [2020-10-14 21:33:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:33:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:51,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:52,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:52,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:54,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:54,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:56,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:56,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-14 21:33:56,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 21:33:56,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 21:33:56,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:56,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 21:33:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:33:56,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-14 21:33:56,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:33:56,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:33:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:56,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:56,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:33:56,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:33:56,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:33:56,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:56,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:56,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:33:56,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:33:56,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:33:56,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:56,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:33:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:57,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:57,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:57,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 21:33:57,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:33:57,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-14 21:33:57,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:57,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:57,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:33:57,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:33:57,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 21:33:57,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:57,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-14 21:33:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:57,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:57,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:57,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:57,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 21:33:57,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:33:57,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-14 21:33:57,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:57,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:57,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:33:57,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:33:57,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-14 21:33:57,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-14 21:33:57,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279215277] [2020-10-14 21:33:57,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:33:57,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 21:33:57,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728964996] [2020-10-14 21:33:57,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:33:57,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:33:57,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:33:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:33:57,982 INFO L87 Difference]: Start difference. First operand 27028 states and 35618 transitions. Second operand 7 states.