/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/Problem19_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:02:27,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:02:27,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:02:27,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:02:27,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:02:27,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:02:27,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:02:27,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:02:27,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:02:27,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:02:27,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:02:27,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:02:27,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:02:27,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:02:27,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:02:27,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:02:27,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:02:27,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:02:27,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:02:27,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:02:27,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:02:27,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:02:27,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:02:27,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:02:27,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:02:27,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:02:27,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:02:27,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:02:27,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:02:27,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:02:27,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:02:27,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:02:27,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:02:27,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:02:27,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:02:27,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:02:27,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:02:27,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:02:27,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:02:27,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:02:27,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:02:27,615 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 23:02:27,665 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:02:27,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:02:27,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:02:27,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:02:27,668 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:02:27,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:02:27,669 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:02:27,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:02:27,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:02:27,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:02:27,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:02:27,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:02:27,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:02:27,672 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:02:27,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:02:27,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:02:27,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:02:27,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:02:27,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:02:27,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:02:27,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:02:27,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:02:27,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:02:27,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:02:27,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:02:27,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:02:27,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:02:27,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:02:27,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:02:27,675 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 23:02:28,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:02:28,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:02:28,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:02:28,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:02:28,020 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:02:28,020 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label26.c [2020-10-14 23:02:28,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/054401251/c316fd13e052462083c926f655d69994/FLAGad5db8efb [2020-10-14 23:02:29,131 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:02:29,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label26.c [2020-10-14 23:02:29,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/054401251/c316fd13e052462083c926f655d69994/FLAGad5db8efb [2020-10-14 23:02:29,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/054401251/c316fd13e052462083c926f655d69994 [2020-10-14 23:02:29,550 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:02:29,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:02:29,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:02:29,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:02:29,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:02:29,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:02:29" (1/1) ... [2020-10-14 23:02:29,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aae5b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:29, skipping insertion in model container [2020-10-14 23:02:29,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:02:29" (1/1) ... [2020-10-14 23:02:29,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:02:29,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:02:32,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:02:32,405 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:02:33,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:02:33,580 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:02:33,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33 WrapperNode [2020-10-14 23:02:33,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:02:33,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:02:33,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:02:33,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:02:33,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (1/1) ... [2020-10-14 23:02:33,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (1/1) ... [2020-10-14 23:02:33,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (1/1) ... [2020-10-14 23:02:33,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (1/1) ... [2020-10-14 23:02:33,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (1/1) ... [2020-10-14 23:02:33,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (1/1) ... [2020-10-14 23:02:34,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (1/1) ... [2020-10-14 23:02:34,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:02:34,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:02:34,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:02:34,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:02:34,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (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 23:02:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:02:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:02:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 23:02:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 23:02:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 23:02:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 23:02:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-14 23:02:34,344 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-14 23:02:34,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:02:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 23:02:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 23:02:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 23:02:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 23:02:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-14 23:02:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-14 23:02:34,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:02:34,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:02:34,347 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:02:34,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:02:34,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:02:34,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:02:47,616 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:02:47,616 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:02:47,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:02:47 BoogieIcfgContainer [2020-10-14 23:02:47,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:02:47,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:02:47,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:02:47,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:02:47,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:02:29" (1/3) ... [2020-10-14 23:02:47,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77985a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:02:47, skipping insertion in model container [2020-10-14 23:02:47,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:02:33" (2/3) ... [2020-10-14 23:02:47,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77985a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:02:47, skipping insertion in model container [2020-10-14 23:02:47,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:02:47" (3/3) ... [2020-10-14 23:02:47,650 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label26.c [2020-10-14 23:02:47,664 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:02:47,675 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:02:47,685 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:02:47,717 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:02:47,718 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:02:47,718 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:02:47,718 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:02:47,718 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:02:47,718 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:02:47,718 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:02:47,718 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:02:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-14 23:02:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:02:47,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:02:47,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:02:47,775 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:02:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:02:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2022464298, now seen corresponding path program 1 times [2020-10-14 23:02:47,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:02:47,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809801495] [2020-10-14 23:02:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:02:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:02:48,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:02:48,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:02:48,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:02:48,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:02:48,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-14 23:02:48,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:02:48,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:02:48,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:02:48,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:02:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:02:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:02:48,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:02:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:02:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:02:48,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:02:48,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:02:48,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:02:48,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 23:02:48,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:02:48,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:02:48,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:02:48,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:02:48,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:02:48,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:02:48,563 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 23:02:48,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809801495] [2020-10-14 23:02:48,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:02:48,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:02:48,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853405608] [2020-10-14 23:02:48,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:02:48,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:02:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:02:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:02:48,597 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-14 23:03:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:03:16,069 INFO L93 Difference]: Finished difference Result 5111 states and 9601 transitions. [2020-10-14 23:03:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:03:16,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-14 23:03:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:03:16,128 INFO L225 Difference]: With dead ends: 5111 [2020-10-14 23:03:16,129 INFO L226 Difference]: Without dead ends: 3270 [2020-10-14 23:03:16,147 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 23:03:16,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2020-10-14 23:03:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 3199. [2020-10-14 23:03:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-14 23:03:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 5483 transitions. [2020-10-14 23:03:16,429 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 5483 transitions. Word has length 32 [2020-10-14 23:03:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:03:16,430 INFO L479 AbstractCegarLoop]: Abstraction has 3199 states and 5483 transitions. [2020-10-14 23:03:16,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:03:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 5483 transitions. [2020-10-14 23:03:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 23:03:16,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:03:16,437 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 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 23:03:16,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:03:16,438 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:03:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:03:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2060753195, now seen corresponding path program 1 times [2020-10-14 23:03:16,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:03:16,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867575875] [2020-10-14 23:03:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:03:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:03:16,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:03:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:03:18,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:03:18,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 23:03:18,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:03:18,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1695 [2020-10-14 23:03:18,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:03:18,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:03:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:03:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:03:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 23:03:18,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 23:03:18,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:03:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:03:18,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:03:18,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:03:18,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:03:18,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:03:18,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 23:03:18,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:03:18,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:03:18,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:03:18,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:03:18,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:03:18,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:03:18,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 23:03:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:03:18,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:03:18,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:03:18,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 23:03:18,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:03:18,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-14 23:03:18,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:03:18,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:03:18,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:03:18,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 23:03:18,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 23:03:18,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:03:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:03:18,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867575875] [2020-10-14 23:03:18,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:03:18,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:03:18,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601173688] [2020-10-14 23:03:18,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:03:18,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:03:18,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:03:18,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:03:18,656 INFO L87 Difference]: Start difference. First operand 3199 states and 5483 transitions. Second operand 7 states. [2020-10-14 23:04:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:04:04,081 INFO L93 Difference]: Finished difference Result 9458 states and 16463 transitions. [2020-10-14 23:04:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:04:04,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-14 23:04:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:04:04,122 INFO L225 Difference]: With dead ends: 9458 [2020-10-14 23:04:04,123 INFO L226 Difference]: Without dead ends: 6265 [2020-10-14 23:04:04,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:04:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6265 states. [2020-10-14 23:04:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6265 to 6121. [2020-10-14 23:04:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6121 states. [2020-10-14 23:04:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6121 states to 6121 states and 8998 transitions. [2020-10-14 23:04:04,381 INFO L78 Accepts]: Start accepts. Automaton has 6121 states and 8998 transitions. Word has length 104 [2020-10-14 23:04:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:04:04,382 INFO L479 AbstractCegarLoop]: Abstraction has 6121 states and 8998 transitions. [2020-10-14 23:04:04,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:04:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6121 states and 8998 transitions. [2020-10-14 23:04:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-14 23:04:04,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:04:04,394 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:04,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:04:04,394 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:04:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:04:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash 447645141, now seen corresponding path program 1 times [2020-10-14 23:04:04,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:04:04,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816804719] [2020-10-14 23:04:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:04:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:04:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:04,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:05,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:04:05,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 23:04:05,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:04:05,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 931 [2020-10-14 23:04:05,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:04:05,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:04:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:04:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:04:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 23:04:05,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:04:05,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:04:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:04:05,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:05,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:04:05,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:04:05,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:04:05,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 23:04:05,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:04:05,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:04:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:04:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:04:05,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:04:05,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:04:05,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 23:04:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:04:05,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:05,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:04:05,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 23:04:05,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:04:05,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-14 23:04:05,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:04:05,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:04:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:04:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 23:04:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 23:04:05,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:04:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:04:05,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816804719] [2020-10-14 23:04:05,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:04:05,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:04:05,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703419830] [2020-10-14 23:04:05,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:04:05,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:04:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:04:05,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:04:05,846 INFO L87 Difference]: Start difference. First operand 6121 states and 8998 transitions. Second operand 7 states. [2020-10-14 23:04:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:04:52,890 INFO L93 Difference]: Finished difference Result 18549 states and 27594 transitions. [2020-10-14 23:04:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:04:52,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-14 23:04:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:04:52,964 INFO L225 Difference]: With dead ends: 18549 [2020-10-14 23:04:52,964 INFO L226 Difference]: Without dead ends: 12434 [2020-10-14 23:04:52,988 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 23:04:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12434 states. [2020-10-14 23:04:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12434 to 12202. [2020-10-14 23:04:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12202 states. [2020-10-14 23:04:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12202 states to 12202 states and 17473 transitions. [2020-10-14 23:04:53,363 INFO L78 Accepts]: Start accepts. Automaton has 12202 states and 17473 transitions. Word has length 113 [2020-10-14 23:04:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:04:53,364 INFO L479 AbstractCegarLoop]: Abstraction has 12202 states and 17473 transitions. [2020-10-14 23:04:53,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:04:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 12202 states and 17473 transitions. [2020-10-14 23:04:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-14 23:04:53,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:04:53,378 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:53,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:04:53,378 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:04:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:04:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1708146369, now seen corresponding path program 1 times [2020-10-14 23:04:53,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:04:53,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596919185] [2020-10-14 23:04:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:04:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:04:53,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:53,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:54,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:04:54,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 23:04:54,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:04:54,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1437 [2020-10-14 23:04:54,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:04:54,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:04:54,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:04:54,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:04:54,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-14 23:04:54,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:04:54,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:04:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:04:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:55,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:04:55,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:04:55,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:04:55,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 23:04:55,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:04:55,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:04:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:04:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:04:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:04:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:04:55,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 23:04:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:04:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:04:55,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:04:55,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 23:04:55,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:04:55,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-14 23:04:55,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:04:55,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:04:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:04:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 23:04:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 23:04:55,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:04:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:04:55,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596919185] [2020-10-14 23:04:55,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:04:55,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:04:55,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428130509] [2020-10-14 23:04:55,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:04:55,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:04:55,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:04:55,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:04:55,498 INFO L87 Difference]: Start difference. First operand 12202 states and 17473 transitions. Second operand 7 states. [2020-10-14 23:06:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:06:15,733 INFO L93 Difference]: Finished difference Result 37125 states and 54288 transitions. [2020-10-14 23:06:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:06:15,741 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-14 23:06:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:06:15,871 INFO L225 Difference]: With dead ends: 37125 [2020-10-14 23:06:15,871 INFO L226 Difference]: Without dead ends: 24929 [2020-10-14 23:06:15,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:06:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24929 states. [2020-10-14 23:06:16,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24929 to 24416. [2020-10-14 23:06:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24416 states. [2020-10-14 23:06:16,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24416 states to 24416 states and 31814 transitions. [2020-10-14 23:06:16,704 INFO L78 Accepts]: Start accepts. Automaton has 24416 states and 31814 transitions. Word has length 133 [2020-10-14 23:06:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:06:16,706 INFO L479 AbstractCegarLoop]: Abstraction has 24416 states and 31814 transitions. [2020-10-14 23:06:16,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:06:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 24416 states and 31814 transitions. [2020-10-14 23:06:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-14 23:06:16,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:06:16,712 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:16,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:06:16,712 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:06:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:06:16,713 INFO L82 PathProgramCache]: Analyzing trace with hash -881976424, now seen corresponding path program 1 times [2020-10-14 23:06:16,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:06:16,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636239969] [2020-10-14 23:06:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:06:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:06:16,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:06:17,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:06:18,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:06:18,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-14 23:06:18,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:06:18,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2169 [2020-10-14 23:06:18,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:06:18,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:06:18,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:06:18,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:06:18,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-14 23:06:18,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:06:19,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:06:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:06:19,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:06:19,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:06:19,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:06:19,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:06:19,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 23:06:19,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:06:19,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:06:19,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:06:19,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:06:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:06:19,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:06:19,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 23:06:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:06:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:06:19,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:06:19,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-14 23:06:19,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:06:19,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-14 23:06:19,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:06:19,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:06:19,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:06:19,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 23:06:19,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-14 23:06:19,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:06:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:06:19,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636239969] [2020-10-14 23:06:19,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:06:19,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:06:19,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267359797] [2020-10-14 23:06:19,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:06:19,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:06:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:06:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:06:19,988 INFO L87 Difference]: Start difference. First operand 24416 states and 31814 transitions. Second operand 7 states.