/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 21:24:41,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 21:24:41,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 21:24:41,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 21:24:41,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 21:24:41,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 21:24:41,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 21:24:41,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 21:24:41,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 21:24:41,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 21:24:41,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 21:24:41,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 21:24:41,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 21:24:41,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 21:24:41,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 21:24:41,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 21:24:41,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 21:24:41,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 21:24:41,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 21:24:41,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 21:24:41,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 21:24:41,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 21:24:41,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 21:24:41,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 21:24:41,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 21:24:41,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 21:24:41,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 21:24:41,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 21:24:41,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 21:24:41,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 21:24:41,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 21:24:41,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 21:24:41,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 21:24:41,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 21:24:41,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 21:24:41,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 21:24:41,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 21:24:41,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 21:24:41,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 21:24:41,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 21:24:41,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 21:24:41,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 21:24:41,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 21:24:41,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 21:24:41,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 21:24:41,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 21:24:41,946 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 21:24:41,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 21:24:41,948 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 21:24:41,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 21:24:41,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 21:24:41,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 21:24:41,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 21:24:41,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 21:24:41,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 21:24:41,951 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 21:24:41,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 21:24:41,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 21:24:41,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 21:24:41,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 21:24:41,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 21:24:41,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 21:24:41,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 21:24:41,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 21:24:41,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 21:24:41,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 21:24:41,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 21:24:41,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 21:24:41,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 21:24:41,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 21:24:41,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 21:24:41,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 21:24:42,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 21:24:42,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 21:24:42,356 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 21:24:42,359 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 21:24:42,359 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 21:24:42,360 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label11.c [2020-10-14 21:24:42,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/084cb3c7a/50bd321b943d4613952f19f1b76f1bfd/FLAG30a4d1ed0 [2020-10-14 21:24:43,500 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 21:24:43,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label11.c [2020-10-14 21:24:43,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/084cb3c7a/50bd321b943d4613952f19f1b76f1bfd/FLAG30a4d1ed0 [2020-10-14 21:24:43,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/084cb3c7a/50bd321b943d4613952f19f1b76f1bfd [2020-10-14 21:24:43,936 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 21:24:43,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 21:24:43,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 21:24:43,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 21:24:43,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 21:24:43,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:24:43" (1/1) ... [2020-10-14 21:24:43,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543c7943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:43, skipping insertion in model container [2020-10-14 21:24:43,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:24:43" (1/1) ... [2020-10-14 21:24:43,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 21:24:44,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 21:24:46,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:24:46,284 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 21:24:47,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:24:47,175 INFO L208 MainTranslator]: Completed translation [2020-10-14 21:24:47,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47 WrapperNode [2020-10-14 21:24:47,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 21:24:47,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 21:24:47,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 21:24:47,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 21:24:47,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (1/1) ... [2020-10-14 21:24:47,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (1/1) ... [2020-10-14 21:24:47,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (1/1) ... [2020-10-14 21:24:47,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (1/1) ... [2020-10-14 21:24:47,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (1/1) ... [2020-10-14 21:24:47,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (1/1) ... [2020-10-14 21:24:47,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (1/1) ... [2020-10-14 21:24:47,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 21:24:47,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 21:24:47,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 21:24:47,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 21:24:47,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (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 21:24:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 21:24:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 21:24:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 21:24:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 21:24:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 21:24:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 21:24:47,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 21:24:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 21:24:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 21:24:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 21:24:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 21:24:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 21:24:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 21:24:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 21:24:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 21:24:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 21:24:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 21:25:00,641 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 21:25:00,641 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 21:25:00,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:25:00 BoogieIcfgContainer [2020-10-14 21:25:00,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 21:25:00,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 21:25:00,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 21:25:00,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 21:25:00,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:24:43" (1/3) ... [2020-10-14 21:25:00,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461070e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:25:00, skipping insertion in model container [2020-10-14 21:25:00,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:47" (2/3) ... [2020-10-14 21:25:00,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461070e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:25:00, skipping insertion in model container [2020-10-14 21:25:00,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:25:00" (3/3) ... [2020-10-14 21:25:00,685 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label11.c [2020-10-14 21:25:00,703 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 21:25:00,723 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 21:25:00,749 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 21:25:00,804 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 21:25:00,804 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 21:25:00,805 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 21:25:00,805 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 21:25:00,805 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 21:25:00,805 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 21:25:00,806 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 21:25:00,806 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 21:25:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-14 21:25:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 21:25:00,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:25:00,897 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 21:25:00,898 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:25:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:25:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1048345647, now seen corresponding path program 1 times [2020-10-14 21:25:00,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:25:00,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048116307] [2020-10-14 21:25:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:25:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:01,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:01,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:01,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 21:25:01,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:25:01,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-14 21:25:01,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:01,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:01,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:25:01,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:25:01,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 21:25:01,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 21:25:01,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:25:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:01,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:01,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:01,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:25:01,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:25:01,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 21:25:01,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:01,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:01,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:25:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:25:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:25:01,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:25:01,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048116307] [2020-10-14 21:25:01,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:25:01,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 21:25:01,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178418314] [2020-10-14 21:25:01,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 21:25:01,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:25:01,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 21:25:01,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 21:25:01,853 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-14 21:25:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:25:21,069 INFO L93 Difference]: Finished difference Result 3242 states and 5947 transitions. [2020-10-14 21:25:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:25:21,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-14 21:25:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:25:21,113 INFO L225 Difference]: With dead ends: 3242 [2020-10-14 21:25:21,120 INFO L226 Difference]: Without dead ends: 2044 [2020-10-14 21:25:21,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 21:25:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-10-14 21:25:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1987. [2020-10-14 21:25:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1987 states. [2020-10-14 21:25:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 3532 transitions. [2020-10-14 21:25:21,363 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 3532 transitions. Word has length 32 [2020-10-14 21:25:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:25:21,364 INFO L479 AbstractCegarLoop]: Abstraction has 1987 states and 3532 transitions. [2020-10-14 21:25:21,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 21:25:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 3532 transitions. [2020-10-14 21:25:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 21:25:21,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:25:21,370 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] [2020-10-14 21:25:21,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 21:25:21,371 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:25:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:25:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 456943543, now seen corresponding path program 1 times [2020-10-14 21:25:21,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:25:21,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872428254] [2020-10-14 21:25:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:25:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:21,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:23,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:23,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 21:25:23,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:25:23,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1944 [2020-10-14 21:25:23,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:23,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:23,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:25:23,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:25:23,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 21:25:23,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 21:25:23,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:25:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:23,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:23,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:25:23,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:25:23,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 21:25:23,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:23,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:23,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:25:23,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:25:23,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:25:23,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:23,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:25:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:23,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:23,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:23,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 21:25:23,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:25:23,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-14 21:25:23,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:23,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:25:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:25:23,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 21:25:23,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:23,793 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 21:25:23,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872428254] [2020-10-14 21:25:23,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:25:23,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:25:23,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705287077] [2020-10-14 21:25:23,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:25:23,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:25:23,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:25:23,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:25:23,799 INFO L87 Difference]: Start difference. First operand 1987 states and 3532 transitions. Second operand 7 states. [2020-10-14 21:25:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:25:46,331 INFO L93 Difference]: Finished difference Result 5695 states and 10275 transitions. [2020-10-14 21:25:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:25:46,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-14 21:25:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:25:46,360 INFO L225 Difference]: With dead ends: 5695 [2020-10-14 21:25:46,360 INFO L226 Difference]: Without dead ends: 3714 [2020-10-14 21:25:46,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-14 21:25:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2020-10-14 21:25:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3678. [2020-10-14 21:25:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3678 states. [2020-10-14 21:25:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 5743 transitions. [2020-10-14 21:25:46,519 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 5743 transitions. Word has length 101 [2020-10-14 21:25:46,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:25:46,520 INFO L479 AbstractCegarLoop]: Abstraction has 3678 states and 5743 transitions. [2020-10-14 21:25:46,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:25:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 5743 transitions. [2020-10-14 21:25:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 21:25:46,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:25:46,532 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] [2020-10-14 21:25:46,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 21:25:46,532 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:25:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:25:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1924762603, now seen corresponding path program 1 times [2020-10-14 21:25:46,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:25:46,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103890874] [2020-10-14 21:25:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:25:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:46,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:46,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:47,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:47,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 21:25:47,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:25:47,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1068 [2020-10-14 21:25:47,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:47,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:47,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:25:47,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:25:47,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 21:25:47,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:47,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:25:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:47,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:47,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:47,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:25:47,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:25:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:25:47,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:47,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:25:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:25:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:25:47,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:47,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:25:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:47,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:47,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:47,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 21:25:47,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:25:47,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-14 21:25:47,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:47,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:47,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:25:47,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:25:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 21:25:47,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:48,240 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 21:25:48,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103890874] [2020-10-14 21:25:48,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:25:48,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:25:48,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106915501] [2020-10-14 21:25:48,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:25:48,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:25:48,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:25:48,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:25:48,245 INFO L87 Difference]: Start difference. First operand 3678 states and 5743 transitions. Second operand 7 states. [2020-10-14 21:26:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:26:09,789 INFO L93 Difference]: Finished difference Result 10922 states and 17300 transitions. [2020-10-14 21:26:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:26:09,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-14 21:26:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:26:09,843 INFO L225 Difference]: With dead ends: 10922 [2020-10-14 21:26:09,844 INFO L226 Difference]: Without dead ends: 7250 [2020-10-14 21:26:09,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 21:26:09,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7250 states. [2020-10-14 21:26:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7250 to 7089. [2020-10-14 21:26:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7089 states. [2020-10-14 21:26:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 9743 transitions. [2020-10-14 21:26:10,113 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 9743 transitions. Word has length 107 [2020-10-14 21:26:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:26:10,119 INFO L479 AbstractCegarLoop]: Abstraction has 7089 states and 9743 transitions. [2020-10-14 21:26:10,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:26:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 9743 transitions. [2020-10-14 21:26:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 21:26:10,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:26:10,124 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] [2020-10-14 21:26:10,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 21:26:10,124 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:26:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:26:10,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1153590033, now seen corresponding path program 1 times [2020-10-14 21:26:10,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:26:10,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36222135] [2020-10-14 21:26:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:26:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:26:10,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:26:10,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:26:11,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:26:11,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-14 21:26:11,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:26:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-14 21:26:11,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:26:11,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:26:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:26:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:26:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-14 21:26:11,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:26:11,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:26:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:26:11,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:26:11,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:26:11,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:26:11,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:26:11,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 21:26:11,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:26:11,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:26:11,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:26:11,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:26:11,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:26:11,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:26:11,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:26:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:26:11,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:26:11,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:26:11,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 21:26:11,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:26:11,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-14 21:26:11,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:26:11,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:26:11,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:26:11,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:26:11,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 21:26:11,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:26:11,763 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 21:26:11,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36222135] [2020-10-14 21:26:11,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:26:11,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:26:11,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015399587] [2020-10-14 21:26:11,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:26:11,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:26:11,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:26:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:26:11,771 INFO L87 Difference]: Start difference. First operand 7089 states and 9743 transitions. Second operand 7 states. [2020-10-14 21:26:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:26:40,231 INFO L93 Difference]: Finished difference Result 18864 states and 26489 transitions. [2020-10-14 21:26:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:26:40,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-10-14 21:26:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:26:40,306 INFO L225 Difference]: With dead ends: 18864 [2020-10-14 21:26:40,307 INFO L226 Difference]: Without dead ends: 11781 [2020-10-14 21:26:40,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:26:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11781 states. [2020-10-14 21:26:40,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11781 to 11513. [2020-10-14 21:26:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11513 states. [2020-10-14 21:26:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11513 states to 11513 states and 15607 transitions. [2020-10-14 21:26:40,650 INFO L78 Accepts]: Start accepts. Automaton has 11513 states and 15607 transitions. Word has length 137 [2020-10-14 21:26:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:26:40,652 INFO L479 AbstractCegarLoop]: Abstraction has 11513 states and 15607 transitions. [2020-10-14 21:26:40,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:26:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 11513 states and 15607 transitions. [2020-10-14 21:26:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 21:26:40,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:26:40,655 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] [2020-10-14 21:26:40,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 21:26:40,656 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:26:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:26:40,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1404988901, now seen corresponding path program 1 times [2020-10-14 21:26:40,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:26:40,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301119866] [2020-10-14 21:26:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:26:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:26:40,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:26:40,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:26:41,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:26:41,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-14 21:26:41,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:26:41,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1293 [2020-10-14 21:26:41,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:26:41,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:26:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:26:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:26:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-14 21:26:41,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:26:42,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:26:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:26:42,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:26:42,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:26:42,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:26:42,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:26:42,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 21:26:42,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:26:42,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:26:42,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:26:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:26:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:26:42,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:26:42,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:26:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:26:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:26:42,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:26:42,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 21:26:42,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:26:42,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-14 21:26:42,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:26:42,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:26:42,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:26:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:26:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 21:26:42,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 21:26:42,599 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 21:26:42,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301119866] [2020-10-14 21:26:42,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:26:42,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:26:42,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980664728] [2020-10-14 21:26:42,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:26:42,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:26:42,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:26:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:26:42,602 INFO L87 Difference]: Start difference. First operand 11513 states and 15607 transitions. Second operand 7 states. [2020-10-14 21:27:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:27:06,196 INFO L93 Difference]: Finished difference Result 22610 states and 31171 transitions. [2020-10-14 21:27:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:27:06,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2020-10-14 21:27:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:27:06,243 INFO L225 Difference]: With dead ends: 22610 [2020-10-14 21:27:06,243 INFO L226 Difference]: Without dead ends: 11906 [2020-10-14 21:27:06,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-14 21:27:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11906 states. [2020-10-14 21:27:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11906 to 11605. [2020-10-14 21:27:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11605 states. [2020-10-14 21:27:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11605 states to 11605 states and 15745 transitions. [2020-10-14 21:27:06,541 INFO L78 Accepts]: Start accepts. Automaton has 11605 states and 15745 transitions. Word has length 147 [2020-10-14 21:27:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:27:06,542 INFO L479 AbstractCegarLoop]: Abstraction has 11605 states and 15745 transitions. [2020-10-14 21:27:06,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:27:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 11605 states and 15745 transitions. [2020-10-14 21:27:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 21:27:06,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:27:06,544 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] [2020-10-14 21:27:06,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 21:27:06,545 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:27:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:27:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -824908968, now seen corresponding path program 1 times [2020-10-14 21:27:06,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:27:06,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643321025] [2020-10-14 21:27:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:27:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:06,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:06,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:07,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:07,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-14 21:27:07,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:27:07,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-14 21:27:07,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:07,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:07,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 21:27:07,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:27:07,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 21:27:07,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:27:07,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:27:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:07,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:07,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:07,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:27:07,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:27:07,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:27:07,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:07,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:07,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:27:07,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:27:07,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:27:07,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:27:07,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:27:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:07,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:07,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:07,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:07,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 21:27:07,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:27:07,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-14 21:27:07,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:07,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:27:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:27:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 21:27:07,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:27:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 21:27:07,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643321025] [2020-10-14 21:27:07,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:27:07,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 21:27:07,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137756717] [2020-10-14 21:27:07,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 21:27:07,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:27:07,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 21:27:07,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 21:27:07,960 INFO L87 Difference]: Start difference. First operand 11605 states and 15745 transitions. Second operand 5 states. [2020-10-14 21:27:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:27:33,240 INFO L93 Difference]: Finished difference Result 30020 states and 43240 transitions. [2020-10-14 21:27:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:27:33,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-14 21:27:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:27:33,330 INFO L225 Difference]: With dead ends: 30020 [2020-10-14 21:27:33,330 INFO L226 Difference]: Without dead ends: 19224 [2020-10-14 21:27:33,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 21:27:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2020-10-14 21:27:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 19162. [2020-10-14 21:27:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19162 states. [2020-10-14 21:27:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19162 states to 19162 states and 25034 transitions. [2020-10-14 21:27:33,833 INFO L78 Accepts]: Start accepts. Automaton has 19162 states and 25034 transitions. Word has length 161 [2020-10-14 21:27:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:27:33,834 INFO L479 AbstractCegarLoop]: Abstraction has 19162 states and 25034 transitions. [2020-10-14 21:27:33,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 21:27:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 19162 states and 25034 transitions. [2020-10-14 21:27:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-14 21:27:33,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:27:33,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:27:33,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 21:27:33,841 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:27:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:27:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1421051687, now seen corresponding path program 1 times [2020-10-14 21:27:33,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:27:33,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634739354] [2020-10-14 21:27:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:27:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:33,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:34,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:35,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:35,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-14 21:27:35,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:27:35,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1812 [2020-10-14 21:27:35,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:35,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:35,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:27:35,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-14 21:27:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 21:27:35,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:27:35,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:27:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:35,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:35,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:35,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:27:35,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:27:35,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 21:27:35,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:35,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:35,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 21:27:35,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:27:35,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 21:27:35,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:27:35,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:27:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:35,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:36,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:36,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 21:27:36,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:27:36,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-14 21:27:36,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:36,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:36,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:27:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:27:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 21:27:36,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 21:27:36,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-14 21:27:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:36,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:36,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:36,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 21:27:36,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:27:36,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-14 21:27:36,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:36,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:36,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:27:36,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:27:36,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 21:27:36,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:27:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 21:27:36,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634739354] [2020-10-14 21:27:36,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:27:36,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 21:27:36,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618808351] [2020-10-14 21:27:36,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:27:36,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:27:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:27:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:27:36,505 INFO L87 Difference]: Start difference. First operand 19162 states and 25034 transitions. Second operand 7 states. [2020-10-14 21:28:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:28:26,933 INFO L93 Difference]: Finished difference Result 40960 states and 57998 transitions. [2020-10-14 21:28:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:28:26,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 251 [2020-10-14 21:28:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:28:27,057 INFO L225 Difference]: With dead ends: 40960 [2020-10-14 21:28:27,057 INFO L226 Difference]: Without dead ends: 30004 [2020-10-14 21:28:27,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:28:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30004 states. [2020-10-14 21:28:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30004 to 27294. [2020-10-14 21:28:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27294 states. [2020-10-14 21:28:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27294 states to 27294 states and 35111 transitions. [2020-10-14 21:28:27,705 INFO L78 Accepts]: Start accepts. Automaton has 27294 states and 35111 transitions. Word has length 251 [2020-10-14 21:28:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:28:27,706 INFO L479 AbstractCegarLoop]: Abstraction has 27294 states and 35111 transitions. [2020-10-14 21:28:27,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:28:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 27294 states and 35111 transitions. [2020-10-14 21:28:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-14 21:28:27,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:28:27,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:28:27,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 21:28:27,713 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:28:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:28:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash 685198591, now seen corresponding path program 1 times [2020-10-14 21:28:27,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:28:27,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962622415] [2020-10-14 21:28:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:28:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:27,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:29,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:30,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:30,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:30,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-14 21:28:30,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 21:28:30,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3171 [2020-10-14 21:28:30,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:30,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:30,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 21:28:30,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:28:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 273 [2020-10-14 21:28:30,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:28:31,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:28:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:31,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:31,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:31,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:28:31,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 21:28:31,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:31,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:28:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:28:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:28:31,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 21:28:31,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:28:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:31,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:31,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:31,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 21:28:31,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:31,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-14 21:28:31,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:31,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:28:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:28:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 21:28:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 21:28:31,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-14 21:28:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:31,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:31,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:31,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 21:28:31,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-14 21:28:31,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:31,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:28:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:28:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-14 21:28:31,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 116 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 21:28:32,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962622415] [2020-10-14 21:28:32,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:28:32,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 21:28:32,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141379155] [2020-10-14 21:28:32,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:28:32,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:28:32,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:28:32,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:28:32,311 INFO L87 Difference]: Start difference. First operand 27294 states and 35111 transitions. Second operand 7 states. [2020-10-14 21:28:32,558 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 36