/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:39:41,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:39:41,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:39:41,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:39:41,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:39:41,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:39:41,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:39:41,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:39:41,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:39:41,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:39:41,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:39:41,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:39:41,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:39:41,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:39:41,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:39:41,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:39:41,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:39:41,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:39:41,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:39:41,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:39:41,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:39:41,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:39:41,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:39:41,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:39:41,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:39:41,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:39:41,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:39:41,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:39:41,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:39:41,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:39:41,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:39:41,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:39:41,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:39:41,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:39:41,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:39:41,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:39:41,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:39:41,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:39:41,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:39:41,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:39:41,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:39:41,740 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 04:39:41,764 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:39:41,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:39:41,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:39:41,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:39:41,766 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:39:41,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:39:41,766 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:39:41,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:39:41,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:39:41,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:39:41,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:39:41,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:39:41,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:39:41,768 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:39:41,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:39:41,768 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:39:41,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:39:41,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:39:41,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:39:41,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:39:41,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:39:41,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:39:41,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:39:41,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:39:41,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:39:41,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:39:41,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:39:41,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:39:41,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:39:41,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:39:42,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:39:42,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:39:42,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:39:42,153 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:39:42,154 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:39:42,155 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label52.c [2020-10-14 04:39:42,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78a183066/7aaef6826bcc458eb4a6898bd380261c/FLAGb2e48ff3c [2020-10-14 04:39:43,290 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:39:43,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label52.c [2020-10-14 04:39:43,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78a183066/7aaef6826bcc458eb4a6898bd380261c/FLAGb2e48ff3c [2020-10-14 04:39:43,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78a183066/7aaef6826bcc458eb4a6898bd380261c [2020-10-14 04:39:43,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:39:43,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:39:43,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:39:43,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:39:43,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:39:43,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:39:43" (1/1) ... [2020-10-14 04:39:43,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@284e4e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:43, skipping insertion in model container [2020-10-14 04:39:43,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:39:43" (1/1) ... [2020-10-14 04:39:43,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:39:43,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:39:46,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:39:46,248 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:39:47,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:39:47,327 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:39:47,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47 WrapperNode [2020-10-14 04:39:47,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:39:47,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:39:47,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:39:47,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:39:47,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (1/1) ... [2020-10-14 04:39:47,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (1/1) ... [2020-10-14 04:39:47,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (1/1) ... [2020-10-14 04:39:47,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (1/1) ... [2020-10-14 04:39:47,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (1/1) ... [2020-10-14 04:39:47,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (1/1) ... [2020-10-14 04:39:47,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (1/1) ... [2020-10-14 04:39:47,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:39:47,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:39:47,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:39:47,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:39:47,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (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 04:39:47,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:39:47,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:39:47,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 04:39:47,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 04:39:47,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 04:39:47,899 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 04:39:47,899 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-14 04:39:47,902 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-14 04:39:47,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:39:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 04:39:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 04:39:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 04:39:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 04:39:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-14 04:39:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-14 04:39:47,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:39:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 04:39:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 04:39:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:39:47,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:39:47,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:40:00,214 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:40:00,215 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 04:40:00,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:40:00 BoogieIcfgContainer [2020-10-14 04:40:00,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:40:00,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:40:00,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:40:00,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:40:00,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:39:43" (1/3) ... [2020-10-14 04:40:00,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f003277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:40:00, skipping insertion in model container [2020-10-14 04:40:00,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:39:47" (2/3) ... [2020-10-14 04:40:00,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f003277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:40:00, skipping insertion in model container [2020-10-14 04:40:00,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:40:00" (3/3) ... [2020-10-14 04:40:00,245 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label52.c [2020-10-14 04:40:00,257 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:40:00,272 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 04:40:00,290 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 04:40:00,323 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 04:40:00,323 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 04:40:00,324 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 04:40:00,324 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 04:40:00,324 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 04:40:00,324 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 04:40:00,324 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 04:40:00,324 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 04:40:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-14 04:40:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 04:40:00,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:40:00,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:40:00,386 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:40:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:40:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash 219048412, now seen corresponding path program 1 times [2020-10-14 04:40:00,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:40:00,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176789480] [2020-10-14 04:40:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:40:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:40:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:01,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:40:01,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 04:40:01,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:40:01,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-14 04:40:01,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:40:01,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:40:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 04:40:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:40:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 04:40:01,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 04:40:01,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:40:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:40:01,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:01,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:40:01,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:40:01,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:40:01,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 04:40:01,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:40:01,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:40:01,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:40:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:40:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:40:01,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:40:01,248 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 04:40:01,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176789480] [2020-10-14 04:40:01,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:40:01,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 04:40:01,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587936375] [2020-10-14 04:40:01,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 04:40:01,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:40:01,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 04:40:01,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:40:01,280 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-14 04:40:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:40:25,031 INFO L93 Difference]: Finished difference Result 5031 states and 9453 transitions. [2020-10-14 04:40:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:40:25,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-14 04:40:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:40:25,080 INFO L225 Difference]: With dead ends: 5031 [2020-10-14 04:40:25,081 INFO L226 Difference]: Without dead ends: 3190 [2020-10-14 04:40:25,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 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 04:40:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-10-14 04:40:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3184. [2020-10-14 04:40:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2020-10-14 04:40:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4965 transitions. [2020-10-14 04:40:25,357 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4965 transitions. Word has length 61 [2020-10-14 04:40:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:40:25,358 INFO L479 AbstractCegarLoop]: Abstraction has 3184 states and 4965 transitions. [2020-10-14 04:40:25,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 04:40:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4965 transitions. [2020-10-14 04:40:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 04:40:25,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:40:25,366 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, 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 04:40:25,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 04:40:25,367 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:40:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:40:25,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1551768197, now seen corresponding path program 1 times [2020-10-14 04:40:25,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:40:25,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129422621] [2020-10-14 04:40:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:40:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:40:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:25,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:25,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:26,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:27,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:28,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:28,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:40:28,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 04:40:28,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 04:40:28,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2794 [2020-10-14 04:40:28,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:40:28,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:40:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:40:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 04:40:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:40:28,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 04:40:28,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:40:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:40:28,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:28,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:40:28,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:40:28,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:40:28,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 04:40:28,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:40:28,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:40:28,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:40:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:40:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:40:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-14 04:40:28,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:40:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:40:28,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:28,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:40:28,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 04:40:28,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:40:28,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-14 04:40:28,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:40:28,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:40:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:40:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-14 04:40:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:40:28,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:40:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:40:28,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129422621] [2020-10-14 04:40:28,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:40:28,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 04:40:28,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583584956] [2020-10-14 04:40:28,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:40:28,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:40:28,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:40:28,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:40:28,534 INFO L87 Difference]: Start difference. First operand 3184 states and 4965 transitions. Second operand 5 states. [2020-10-14 04:41:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:41:08,355 INFO L93 Difference]: Finished difference Result 9218 states and 14512 transitions. [2020-10-14 04:41:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:41:08,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-14 04:41:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:41:08,400 INFO L225 Difference]: With dead ends: 9218 [2020-10-14 04:41:08,401 INFO L226 Difference]: Without dead ends: 6040 [2020-10-14 04:41:08,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:41:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2020-10-14 04:41:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 6024. [2020-10-14 04:41:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-14 04:41:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8358 transitions. [2020-10-14 04:41:08,643 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8358 transitions. Word has length 134 [2020-10-14 04:41:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:41:08,647 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8358 transitions. [2020-10-14 04:41:08,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:41:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8358 transitions. [2020-10-14 04:41:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 04:41:08,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:41:08,664 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, 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 04:41:08,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 04:41:08,666 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:41:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:41:08,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1349944263, now seen corresponding path program 1 times [2020-10-14 04:41:08,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:41:08,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399626924] [2020-10-14 04:41:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:41:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:41:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:41:09,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:41:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:41:10,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:41:10,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:41:10,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 04:41:10,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 04:41:10,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2088 [2020-10-14 04:41:10,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:41:10,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:41:10,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:41:10,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 04:41:10,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 04:41:10,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:41:10,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:41:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:41:10,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:41:11,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:41:11,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:41:11,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:41:11,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 04:41:11,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:41:11,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:41:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:41:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:41:11,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:41:11,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:41:11,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:41:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:41:11,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:41:11,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:41:11,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 04:41:11,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:41:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-14 04:41:11,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:41:11,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:41:11,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:41:11,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:41:11,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 04:41:11,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:41:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:41:11,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399626924] [2020-10-14 04:41:11,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:41:11,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:41:11,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56562833] [2020-10-14 04:41:11,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:41:11,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:41:11,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:41:11,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:41:11,296 INFO L87 Difference]: Start difference. First operand 6024 states and 8358 transitions. Second operand 5 states. [2020-10-14 04:42:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:42:01,508 INFO L93 Difference]: Finished difference Result 17773 states and 24921 transitions. [2020-10-14 04:42:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:42:01,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-14 04:42:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:42:01,575 INFO L225 Difference]: With dead ends: 17773 [2020-10-14 04:42:01,576 INFO L226 Difference]: Without dead ends: 11755 [2020-10-14 04:42:01,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:42:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11755 states. [2020-10-14 04:42:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11755 to 11707. [2020-10-14 04:42:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11707 states. [2020-10-14 04:42:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11707 states to 11707 states and 15127 transitions. [2020-10-14 04:42:01,961 INFO L78 Accepts]: Start accepts. Automaton has 11707 states and 15127 transitions. Word has length 134 [2020-10-14 04:42:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:42:01,962 INFO L479 AbstractCegarLoop]: Abstraction has 11707 states and 15127 transitions. [2020-10-14 04:42:01,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:42:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 11707 states and 15127 transitions. [2020-10-14 04:42:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 04:42:01,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:42:01,971 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-14 04:42:01,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 04:42:01,972 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:42:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:42:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1316128014, now seen corresponding path program 1 times [2020-10-14 04:42:01,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:42:01,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573762110] [2020-10-14 04:42:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:42:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:42:02,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:42:02,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:42:03,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:42:03,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 04:42:03,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:42:03,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-14 04:42:03,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:42:03,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:42:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:42:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-14 04:42:03,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 04:42:03,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:42:03,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:42:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:42:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:42:03,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:42:03,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:42:03,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:42:03,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 04:42:03,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:42:03,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:42:03,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:42:03,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:42:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:42:03,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:42:03,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:42:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:42:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:42:03,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:42:03,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 04:42:03,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:42:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-14 04:42:03,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:42:03,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:42:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:42:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:42:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 04:42:03,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:42:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:42:03,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573762110] [2020-10-14 04:42:03,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:42:03,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:42:03,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692202975] [2020-10-14 04:42:03,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:42:03,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:42:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:42:03,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:42:03,436 INFO L87 Difference]: Start difference. First operand 11707 states and 15127 transitions. Second operand 5 states. [2020-10-14 04:43:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:43:06,331 INFO L93 Difference]: Finished difference Result 29062 states and 38883 transitions. [2020-10-14 04:43:06,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:43:06,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-14 04:43:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:43:06,412 INFO L225 Difference]: With dead ends: 29062 [2020-10-14 04:43:06,412 INFO L226 Difference]: Without dead ends: 17361 [2020-10-14 04:43:06,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:43:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17361 states. [2020-10-14 04:43:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17361 to 17335. [2020-10-14 04:43:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17335 states. [2020-10-14 04:43:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17335 states to 17335 states and 21643 transitions. [2020-10-14 04:43:06,870 INFO L78 Accepts]: Start accepts. Automaton has 17335 states and 21643 transitions. Word has length 142 [2020-10-14 04:43:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:43:06,871 INFO L479 AbstractCegarLoop]: Abstraction has 17335 states and 21643 transitions. [2020-10-14 04:43:06,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:43:06,871 INFO L276 IsEmpty]: Start isEmpty. Operand 17335 states and 21643 transitions. [2020-10-14 04:43:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-14 04:43:06,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:43:06,876 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:43:06,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 04:43:06,877 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:43:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:43:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1623067490, now seen corresponding path program 1 times [2020-10-14 04:43:06,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:43:06,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935971961] [2020-10-14 04:43:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:43:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:43:06,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:43:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:43:08,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:43:10,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:43:10,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-14 04:43:10,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 04:43:10,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3149 [2020-10-14 04:43:10,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:43:10,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:43:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:43:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-14 04:43:10,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 04:43:10,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:43:10,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:43:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:43:10,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:43:10,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:43:10,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:43:10,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:43:10,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 04:43:10,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:43:10,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:43:10,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:43:10,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:43:10,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:43:10,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:43:10,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:43:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:43:10,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:43:10,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:43:10,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 04:43:10,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:43:10,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-14 04:43:10,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:43:10,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:43:10,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:43:10,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:43:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-14 04:43:10,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:43:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:43:10,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935971961] [2020-10-14 04:43:10,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:43:10,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:43:10,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145112778] [2020-10-14 04:43:10,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:43:10,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:43:10,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:43:10,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:43:10,520 INFO L87 Difference]: Start difference. First operand 17335 states and 21643 transitions. Second operand 5 states.