/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/Problem04_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 19:22:51,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 19:22:51,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 19:22:51,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 19:22:51,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 19:22:51,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 19:22:51,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 19:22:51,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 19:22:51,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 19:22:51,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 19:22:51,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 19:22:51,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 19:22:51,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 19:22:51,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 19:22:51,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 19:22:51,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 19:22:51,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 19:22:51,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 19:22:51,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 19:22:51,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 19:22:51,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 19:22:51,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 19:22:51,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 19:22:51,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 19:22:51,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 19:22:51,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 19:22:51,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 19:22:51,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 19:22:51,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 19:22:51,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 19:22:51,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 19:22:51,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 19:22:51,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 19:22:51,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 19:22:51,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 19:22:51,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 19:22:51,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 19:22:51,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 19:22:51,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 19:22:51,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 19:22:51,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 19:22:51,670 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 19:22:51,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 19:22:51,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 19:22:51,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 19:22:51,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 19:22:51,720 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 19:22:51,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 19:22:51,721 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 19:22:51,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 19:22:51,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 19:22:51,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 19:22:51,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 19:22:51,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 19:22:51,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 19:22:51,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 19:22:51,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 19:22:51,724 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 19:22:51,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 19:22:51,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 19:22:51,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 19:22:51,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 19:22:51,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 19:22:51,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 19:22:51,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 19:22:51,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 19:22:51,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 19:22:51,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 19:22:51,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 19:22:51,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 19:22:51,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 19:22:51,726 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 19:22:52,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 19:22:52,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 19:22:52,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 19:22:52,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 19:22:52,056 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 19:22:52,056 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label16.c [2020-10-14 19:22:52,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ffe2fbb5/8cc5587e4d2c4a91a318b5d925c2fe3b/FLAGac6879542 [2020-10-14 19:22:52,890 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 19:22:52,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label16.c [2020-10-14 19:22:52,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ffe2fbb5/8cc5587e4d2c4a91a318b5d925c2fe3b/FLAGac6879542 [2020-10-14 19:22:52,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ffe2fbb5/8cc5587e4d2c4a91a318b5d925c2fe3b [2020-10-14 19:22:53,001 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 19:22:53,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 19:22:53,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 19:22:53,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 19:22:53,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 19:22:53,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:22:52" (1/1) ... [2020-10-14 19:22:53,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fdab4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:53, skipping insertion in model container [2020-10-14 19:22:53,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:22:52" (1/1) ... [2020-10-14 19:22:53,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 19:22:53,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 19:22:54,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 19:22:54,762 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 19:22:55,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 19:22:55,502 INFO L208 MainTranslator]: Completed translation [2020-10-14 19:22:55,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55 WrapperNode [2020-10-14 19:22:55,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 19:22:55,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 19:22:55,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 19:22:55,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 19:22:55,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (1/1) ... [2020-10-14 19:22:55,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (1/1) ... [2020-10-14 19:22:55,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (1/1) ... [2020-10-14 19:22:55,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (1/1) ... [2020-10-14 19:22:55,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (1/1) ... [2020-10-14 19:22:55,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (1/1) ... [2020-10-14 19:22:55,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (1/1) ... [2020-10-14 19:22:55,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 19:22:55,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 19:22:55,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 19:22:55,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 19:22:55,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (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 19:22:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 19:22:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 19:22:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 19:22:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 19:22:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 19:22:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 19:22:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 19:22:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 19:22:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 19:22:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 19:22:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 19:22:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 19:22:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 19:22:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 19:22:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 19:22:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 19:22:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 19:23:00,266 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 19:23:00,266 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 19:23:00,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:23:00 BoogieIcfgContainer [2020-10-14 19:23:00,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 19:23:00,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 19:23:00,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 19:23:00,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 19:23:00,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:22:52" (1/3) ... [2020-10-14 19:23:00,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ec1745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:23:00, skipping insertion in model container [2020-10-14 19:23:00,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:55" (2/3) ... [2020-10-14 19:23:00,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ec1745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:23:00, skipping insertion in model container [2020-10-14 19:23:00,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:23:00" (3/3) ... [2020-10-14 19:23:00,299 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label16.c [2020-10-14 19:23:00,310 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 19:23:00,321 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 19:23:00,335 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 19:23:00,366 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 19:23:00,366 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 19:23:00,366 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 19:23:00,366 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 19:23:00,366 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 19:23:00,367 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 19:23:00,367 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 19:23:00,367 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 19:23:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2020-10-14 19:23:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2020-10-14 19:23:00,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:23:00,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:00,461 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:23:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:23:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash 241232490, now seen corresponding path program 1 times [2020-10-14 19:23:00,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:23:00,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743038265] [2020-10-14 19:23:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:23:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:01,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:05,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:06,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:06,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 825 [2020-10-14 19:23:06,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 19:23:06,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-14 19:23:06,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:06,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 19:23:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 19:23:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 819 [2020-10-14 19:23:06,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 19:23:07,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:23:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:07,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:07,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:07,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:23:07,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:07,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 19:23:07,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:07,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:07,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:23:07,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:07,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 19:23:07,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:23:08,023 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 19:23:08,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743038265] [2020-10-14 19:23:08,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 19:23:08,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 19:23:08,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551413446] [2020-10-14 19:23:08,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 19:23:08,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:23:08,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 19:23:08,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 19:23:08,053 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 4 states. [2020-10-14 19:23:08,211 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-14 19:23:16,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:23:16,437 INFO L93 Difference]: Finished difference Result 2672 states and 5138 transitions. [2020-10-14 19:23:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 19:23:16,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 811 [2020-10-14 19:23:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:23:16,498 INFO L225 Difference]: With dead ends: 2672 [2020-10-14 19:23:16,498 INFO L226 Difference]: Without dead ends: 1702 [2020-10-14 19:23:16,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:23:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2020-10-14 19:23:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1687. [2020-10-14 19:23:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1687 states. [2020-10-14 19:23:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 3015 transitions. [2020-10-14 19:23:16,728 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 3015 transitions. Word has length 811 [2020-10-14 19:23:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:23:16,731 INFO L479 AbstractCegarLoop]: Abstraction has 1687 states and 3015 transitions. [2020-10-14 19:23:16,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 19:23:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 3015 transitions. [2020-10-14 19:23:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-10-14 19:23:16,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:23:16,763 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:16,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 19:23:16,764 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:23:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:23:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -260099655, now seen corresponding path program 1 times [2020-10-14 19:23:16,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:23:16,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338086535] [2020-10-14 19:23:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:23:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:17,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:20,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:22,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:22,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 846 [2020-10-14 19:23:22,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:23:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-14 19:23:22,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:22,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:22,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 19:23:22,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 19:23:22,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 816 [2020-10-14 19:23:22,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:23:22,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:23:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:22,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:22,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:22,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:23:22,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:22,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 19:23:22,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:22,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:22,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:23:22,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:22,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:23:22,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:23:22,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:23:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:22,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:22,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:22,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 19:23:22,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:22,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 19:23:22,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:23:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:23:24,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338086535] [2020-10-14 19:23:24,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:23:24,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 19:23:24,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091292987] [2020-10-14 19:23:24,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 19:23:24,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:23:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 19:23:24,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:23:24,048 INFO L87 Difference]: Start difference. First operand 1687 states and 3015 transitions. Second operand 5 states. [2020-10-14 19:23:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:23:32,513 INFO L93 Difference]: Finished difference Result 5073 states and 9131 transitions. [2020-10-14 19:23:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 19:23:32,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 830 [2020-10-14 19:23:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:23:32,546 INFO L225 Difference]: With dead ends: 5073 [2020-10-14 19:23:32,547 INFO L226 Difference]: Without dead ends: 3392 [2020-10-14 19:23:32,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 19:23:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2020-10-14 19:23:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3377. [2020-10-14 19:23:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3377 states. [2020-10-14 19:23:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 5690 transitions. [2020-10-14 19:23:32,664 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 5690 transitions. Word has length 830 [2020-10-14 19:23:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:23:32,667 INFO L479 AbstractCegarLoop]: Abstraction has 3377 states and 5690 transitions. [2020-10-14 19:23:32,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 19:23:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 5690 transitions. [2020-10-14 19:23:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 833 [2020-10-14 19:23:32,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:23:32,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:32,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 19:23:32,682 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:23:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:23:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1242255107, now seen corresponding path program 1 times [2020-10-14 19:23:32,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:23:32,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452759814] [2020-10-14 19:23:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:23:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:32,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:37,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:37,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 848 [2020-10-14 19:23:37,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:23:37,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 19:23:37,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:37,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:37,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 19:23:37,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 19:23:37,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 796 [2020-10-14 19:23:37,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:23:38,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:23:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:38,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:38,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:38,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:23:38,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:38,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 19:23:38,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:38,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:38,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:23:38,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:38,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:23:38,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:23:38,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:23:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:38,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:38,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:38,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 19:23:38,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:38,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-14 19:23:38,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:38,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:23:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 19:23:38,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:23:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:23:42,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452759814] [2020-10-14 19:23:42,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:23:42,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 19:23:42,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655033039] [2020-10-14 19:23:42,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 19:23:42,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:23:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 19:23:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:23:42,343 INFO L87 Difference]: Start difference. First operand 3377 states and 5690 transitions. Second operand 5 states. [2020-10-14 19:23:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:23:51,456 INFO L93 Difference]: Finished difference Result 7550 states and 12970 transitions. [2020-10-14 19:23:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 19:23:51,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 832 [2020-10-14 19:23:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:23:51,479 INFO L225 Difference]: With dead ends: 7550 [2020-10-14 19:23:51,480 INFO L226 Difference]: Without dead ends: 3392 [2020-10-14 19:23:51,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 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 19:23:51,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2020-10-14 19:23:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3377. [2020-10-14 19:23:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3377 states. [2020-10-14 19:23:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 5686 transitions. [2020-10-14 19:23:51,592 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 5686 transitions. Word has length 832 [2020-10-14 19:23:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:23:51,593 INFO L479 AbstractCegarLoop]: Abstraction has 3377 states and 5686 transitions. [2020-10-14 19:23:51,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 19:23:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 5686 transitions. [2020-10-14 19:23:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-10-14 19:23:51,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:23:51,612 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:51,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 19:23:51,613 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:23:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:23:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1328215798, now seen corresponding path program 1 times [2020-10-14 19:23:51,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:23:51,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216438363] [2020-10-14 19:23:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:23:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:51,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:51,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:55,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:56,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:56,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 857 [2020-10-14 19:23:56,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:23:56,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 19:23:56,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:56,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 19:23:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 19:23:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 718 [2020-10-14 19:23:56,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:23:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:23:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:58,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:58,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:23:58,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:58,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 19:23:58,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:58,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:23:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:23:58,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:23:58,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:23:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:58,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:58,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:58,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 19:23:58,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:58,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 19:23:58,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:58,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:58,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:23:58,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:58,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:23:58,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:23:58,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 19:23:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:58,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:58,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:58,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 19:23:58,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:58,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 19:23:58,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:58,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:23:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 19:23:58,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 19:24:03,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216438363] [2020-10-14 19:24:03,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:24:03,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 19:24:03,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647278725] [2020-10-14 19:24:03,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 19:24:03,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:24:03,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 19:24:03,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 19:24:03,260 INFO L87 Difference]: Start difference. First operand 3377 states and 5686 transitions. Second operand 19 states. [2020-10-14 19:24:09,942 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-14 19:24:10,778 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-14 19:24:17,546 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-14 19:24:20,338 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-14 19:24:22,485 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-14 19:24:22,671 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 19:24:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:24:24,543 INFO L93 Difference]: Finished difference Result 7472 states and 12836 transitions. [2020-10-14 19:24:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 19:24:24,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 839 [2020-10-14 19:24:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:24:24,564 INFO L225 Difference]: With dead ends: 7472 [2020-10-14 19:24:24,565 INFO L226 Difference]: Without dead ends: 4101 [2020-10-14 19:24:24,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2020-10-14 19:24:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2020-10-14 19:24:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 4097. [2020-10-14 19:24:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4097 states. [2020-10-14 19:24:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 6434 transitions. [2020-10-14 19:24:24,663 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 6434 transitions. Word has length 839 [2020-10-14 19:24:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:24:24,665 INFO L479 AbstractCegarLoop]: Abstraction has 4097 states and 6434 transitions. [2020-10-14 19:24:24,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 19:24:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 6434 transitions. [2020-10-14 19:24:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-10-14 19:24:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:24:24,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:24:24,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 19:24:24,683 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:24:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:24:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash -758306461, now seen corresponding path program 1 times [2020-10-14 19:24:24,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:24:24,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348724464] [2020-10-14 19:24:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:24:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:24,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:25,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:27,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:29,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:29,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 855 [2020-10-14 19:24:29,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:24:29,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 19:24:29,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:29,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:29,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 19:24:29,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 19:24:29,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 816 [2020-10-14 19:24:29,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:24:30,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:24:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:30,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:30,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:24:30,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:30,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 19:24:30,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:30,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:30,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:24:30,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:30,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:24:30,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:24:30,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:24:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:30,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:30,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:30,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 19:24:30,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:30,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 19:24:30,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:30,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:30,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:24:30,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:30,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 19:24:30,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:24:30,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348724464] [2020-10-14 19:24:30,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:24:30,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 19:24:30,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092005860] [2020-10-14 19:24:30,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 19:24:30,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:24:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 19:24:30,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 19:24:30,824 INFO L87 Difference]: Start difference. First operand 4097 states and 6434 transitions. Second operand 6 states. [2020-10-14 19:24:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:24:46,003 INFO L93 Difference]: Finished difference Result 14956 states and 24805 transitions. [2020-10-14 19:24:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 19:24:46,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 839 [2020-10-14 19:24:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:24:46,072 INFO L225 Difference]: With dead ends: 14956 [2020-10-14 19:24:46,072 INFO L226 Difference]: Without dead ends: 10865 [2020-10-14 19:24:46,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 19:24:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10865 states. [2020-10-14 19:24:46,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10865 to 10846. [2020-10-14 19:24:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10846 states. [2020-10-14 19:24:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10846 states to 10846 states and 15979 transitions. [2020-10-14 19:24:46,320 INFO L78 Accepts]: Start accepts. Automaton has 10846 states and 15979 transitions. Word has length 839 [2020-10-14 19:24:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:24:46,322 INFO L479 AbstractCegarLoop]: Abstraction has 10846 states and 15979 transitions. [2020-10-14 19:24:46,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 19:24:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 10846 states and 15979 transitions. [2020-10-14 19:24:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2020-10-14 19:24:46,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:24:46,371 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:24:46,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 19:24:46,372 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:24:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:24:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1123065838, now seen corresponding path program 1 times [2020-10-14 19:24:46,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:24:46,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964623306] [2020-10-14 19:24:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:24:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:46,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:46,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:51,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:51,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 871 [2020-10-14 19:24:51,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:24:51,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-14 19:24:51,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:51,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 19:24:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 19:24:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 718 [2020-10-14 19:24:51,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:24:55,145 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-14 19:24:55,265 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-14 19:24:55,397 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-14 19:24:55,780 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-14 19:24:55,934 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-14 19:24:56,206 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-14 19:24:56,425 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-14 19:24:56,698 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2020-10-14 19:24:57,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:24:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:57,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:57,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:57,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:24:57,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 19:24:57,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:57,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:24:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:24:57,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:24:57,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:24:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:57,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:57,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:57,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 19:24:57,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:57,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 19:24:57,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:57,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:24:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:24:57,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:24:57,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 19:24:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:57,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:57,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:57,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 19:24:57,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:57,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 19:24:57,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:57,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:24:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 19:24:57,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 19:25:03,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964623306] [2020-10-14 19:25:03,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:25:03,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 19:25:03,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791665710] [2020-10-14 19:25:03,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 19:25:03,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:25:03,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 19:25:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-14 19:25:03,294 INFO L87 Difference]: Start difference. First operand 10846 states and 15979 transitions. Second operand 19 states. [2020-10-14 19:25:04,050 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-14 19:25:04,211 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-14 19:25:08,100 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-14 19:25:10,601 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 19:25:11,542 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-14 19:25:14,129 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-10-14 19:25:17,331 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-14 19:25:17,503 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-14 19:25:18,866 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-10-14 19:25:21,836 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-14 19:25:24,071 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-14 19:25:24,219 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-14 19:25:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:25:26,122 INFO L93 Difference]: Finished difference Result 22414 states and 33517 transitions. [2020-10-14 19:25:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 19:25:26,123 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 853 [2020-10-14 19:25:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:25:26,162 INFO L225 Difference]: With dead ends: 22414 [2020-10-14 19:25:26,163 INFO L226 Difference]: Without dead ends: 11574 [2020-10-14 19:25:26,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2020-10-14 19:25:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11574 states. [2020-10-14 19:25:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11574 to 10846. [2020-10-14 19:25:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10846 states. [2020-10-14 19:25:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10846 states to 10846 states and 15979 transitions. [2020-10-14 19:25:26,424 INFO L78 Accepts]: Start accepts. Automaton has 10846 states and 15979 transitions. Word has length 853 [2020-10-14 19:25:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:25:26,425 INFO L479 AbstractCegarLoop]: Abstraction has 10846 states and 15979 transitions. [2020-10-14 19:25:26,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 19:25:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10846 states and 15979 transitions. [2020-10-14 19:25:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2020-10-14 19:25:26,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:25:26,466 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:25:26,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 19:25:26,466 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:25:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:25:26,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2052338956, now seen corresponding path program 1 times [2020-10-14 19:25:26,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:25:26,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069270877] [2020-10-14 19:25:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:25:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:26,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:26,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:31,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:31,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 902 [2020-10-14 19:25:31,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:25:31,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-14 19:25:31,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:31,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:31,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 19:25:31,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 19:25:31,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 568 [2020-10-14 19:25:31,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:25:32,979 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-14 19:25:33,109 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-14 19:25:33,256 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-14 19:25:33,401 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-14 19:25:33,536 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-14 19:25:33,694 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-14 19:25:33,875 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-14 19:25:34,116 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 46 [2020-10-14 19:25:34,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:25:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:34,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:34,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:34,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:25:34,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:34,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 19:25:34,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:34,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:25:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:25:34,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:25:34,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:34,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:25:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:34,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:34,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:34,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 19:25:34,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 19:25:34,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:34,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:25:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:25:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:25:34,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:34,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 19:25:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:34,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:34,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:34,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 19:25:34,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:34,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-14 19:25:34,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:34,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:34,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:25:34,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:25:34,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 19:25:34,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-14 19:25:39,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069270877] [2020-10-14 19:25:39,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:25:39,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 19:25:39,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83462338] [2020-10-14 19:25:39,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 19:25:39,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:25:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 19:25:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-14 19:25:39,744 INFO L87 Difference]: Start difference. First operand 10846 states and 15979 transitions. Second operand 17 states. [2020-10-14 19:25:40,439 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-14 19:25:40,638 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-14 19:25:41,509 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-14 19:25:42,106 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-14 19:25:45,083 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-10-14 19:25:45,586 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-14 19:25:45,762 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-14 19:25:48,573 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2020-10-14 19:25:49,142 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2020-10-14 19:25:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:25:54,808 INFO L93 Difference]: Finished difference Result 22276 states and 33235 transitions. [2020-10-14 19:25:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 19:25:54,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 884 [2020-10-14 19:25:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:25:54,845 INFO L225 Difference]: With dead ends: 22276 [2020-10-14 19:25:54,846 INFO L226 Difference]: Without dead ends: 11436 [2020-10-14 19:25:54,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2020-10-14 19:25:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11436 states. [2020-10-14 19:25:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11436 to 11428. [2020-10-14 19:25:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11428 states. [2020-10-14 19:25:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 16639 transitions. [2020-10-14 19:25:55,070 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 16639 transitions. Word has length 884 [2020-10-14 19:25:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:25:55,071 INFO L479 AbstractCegarLoop]: Abstraction has 11428 states and 16639 transitions. [2020-10-14 19:25:55,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 19:25:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 16639 transitions. [2020-10-14 19:25:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2020-10-14 19:25:55,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:25:55,114 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:25:55,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 19:25:55,114 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:25:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:25:55,116 INFO L82 PathProgramCache]: Analyzing trace with hash 441896945, now seen corresponding path program 1 times [2020-10-14 19:25:55,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:25:55,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828367896] [2020-10-14 19:25:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:25:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:55,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:55,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:00,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:00,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 938 [2020-10-14 19:26:00,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 19:26:00,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-14 19:26:00,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-14 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 568 [2020-10-14 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:01,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:26:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:01,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:01,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:01,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:26:01,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:01,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 19:26:01,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:01,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:01,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:26:01,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:01,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:26:01,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:01,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:26:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:01,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:01,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:01,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 19:26:01,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:01,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-14 19:26:01,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:01,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:26:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 19:26:01,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 107 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:26:05,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828367896] [2020-10-14 19:26:05,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:26:05,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 19:26:05,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288522396] [2020-10-14 19:26:05,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 19:26:05,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:26:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 19:26:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-14 19:26:05,641 INFO L87 Difference]: Start difference. First operand 11428 states and 16639 transitions. Second operand 17 states. [2020-10-14 19:26:08,101 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-14 19:26:09,674 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-10-14 19:26:10,636 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-10-14 19:26:15,595 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-10-14 19:26:16,355 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-14 19:26:16,622 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-14 19:26:20,641 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-14 19:26:21,366 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-14 19:26:24,304 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 19:26:24,503 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80