/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:10:33,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:10:33,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:10:33,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:10:33,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:10:33,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:10:33,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:10:33,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:10:33,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:10:33,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:10:33,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:10:33,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:10:33,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:10:33,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:10:33,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:10:33,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:10:33,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:10:33,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:10:33,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:10:33,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:10:33,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:10:33,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:10:33,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:10:33,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:10:33,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:10:33,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:10:33,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:10:33,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:10:33,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:10:33,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:10:33,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:10:33,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:10:33,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:10:33,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:10:33,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:10:33,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:10:33,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:10:33,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:10:33,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:10:33,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:10:33,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:10:33,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 23:10:33,890 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:10:33,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:10:33,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:10:33,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:10:33,895 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:10:33,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:10:33,896 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:10:33,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:10:33,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:10:33,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:10:33,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:10:33,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:10:33,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:10:33,899 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:10:33,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:10:33,899 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:10:33,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:10:33,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:10:33,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:10:33,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:10:33,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:10:33,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:10:33,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:10:33,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:10:33,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:10:33,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:10:33,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:10:33,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:10:33,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:10:33,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:10:34,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:10:34,380 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:10:34,384 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:10:34,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:10:34,387 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:10:34,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-14 23:10:34,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f76c32757/32047a1b86fe4a2c87faf294de4e5b62/FLAGcdb2973f4 [2020-10-14 23:10:35,683 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:10:35,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-14 23:10:35,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f76c32757/32047a1b86fe4a2c87faf294de4e5b62/FLAGcdb2973f4 [2020-10-14 23:10:35,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f76c32757/32047a1b86fe4a2c87faf294de4e5b62 [2020-10-14 23:10:35,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:10:35,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:10:35,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:10:35,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:10:35,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:10:35,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:10:35" (1/1) ... [2020-10-14 23:10:35,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd7b52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:35, skipping insertion in model container [2020-10-14 23:10:35,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:10:35" (1/1) ... [2020-10-14 23:10:35,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:10:36,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:10:39,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:10:39,196 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:10:40,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:10:40,466 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:10:40,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40 WrapperNode [2020-10-14 23:10:40,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:10:40,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:10:40,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:10:40,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:10:40,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (1/1) ... [2020-10-14 23:10:40,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (1/1) ... [2020-10-14 23:10:40,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (1/1) ... [2020-10-14 23:10:40,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (1/1) ... [2020-10-14 23:10:40,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (1/1) ... [2020-10-14 23:10:40,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (1/1) ... [2020-10-14 23:10:41,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (1/1) ... [2020-10-14 23:10:41,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:10:41,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:10:41,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:10:41,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:10:41,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:10:41,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:10:41,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:10:41,285 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 23:10:41,285 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 23:10:41,286 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 23:10:41,286 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 23:10:41,286 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-14 23:10:41,288 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-14 23:10:41,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:10:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 23:10:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 23:10:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 23:10:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 23:10:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-14 23:10:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-14 23:10:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:10:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:10:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:10:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:10:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:10:41,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:10:54,976 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:10:54,976 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:10:54,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:10:54 BoogieIcfgContainer [2020-10-14 23:10:54,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:10:55,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:10:55,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:10:55,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:10:55,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:10:35" (1/3) ... [2020-10-14 23:10:55,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be9866f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:10:55, skipping insertion in model container [2020-10-14 23:10:55,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:10:40" (2/3) ... [2020-10-14 23:10:55,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be9866f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:10:55, skipping insertion in model container [2020-10-14 23:10:55,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:10:54" (3/3) ... [2020-10-14 23:10:55,009 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2020-10-14 23:10:55,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:10:55,033 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:10:55,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:10:55,077 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:10:55,077 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:10:55,077 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:10:55,077 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:10:55,077 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:10:55,077 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:10:55,077 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:10:55,077 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:10:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-14 23:10:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:10:55,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:10:55,131 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] [2020-10-14 23:10:55,131 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:10:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:10:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash 578579204, now seen corresponding path program 1 times [2020-10-14 23:10:55,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:10:55,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511147103] [2020-10-14 23:10:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:10:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:10:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:10:55,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:10:55,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:10:55,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:10:55,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-14 23:10:55,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:10:55,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:10:55,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:10:55,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:10:55,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:10:55,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:10:55,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:10:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:10:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:10:55,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:10:55,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:10:55,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:10:55,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 23:10:55,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:10:55,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:10:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:10:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:10:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:10:55,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:10:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:10:55,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511147103] [2020-10-14 23:10:55,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:10:55,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:10:55,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736573259] [2020-10-14 23:10:55,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:10:55,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:10:55,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:10:55,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:10:55,843 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-14 23:11:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:11:22,076 INFO L93 Difference]: Finished difference Result 5031 states and 9453 transitions. [2020-10-14 23:11:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:11:22,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-14 23:11:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:11:22,130 INFO L225 Difference]: With dead ends: 5031 [2020-10-14 23:11:22,131 INFO L226 Difference]: Without dead ends: 3190 [2020-10-14 23:11:22,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:11:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-10-14 23:11:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3184. [2020-10-14 23:11:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2020-10-14 23:11:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4965 transitions. [2020-10-14 23:11:22,373 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4965 transitions. Word has length 23 [2020-10-14 23:11:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:11:22,376 INFO L479 AbstractCegarLoop]: Abstraction has 3184 states and 4965 transitions. [2020-10-14 23:11:22,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:11:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4965 transitions. [2020-10-14 23:11:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 23:11:22,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:11:22,385 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] [2020-10-14 23:11:22,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:11:22,386 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:11:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:11:22,386 INFO L82 PathProgramCache]: Analyzing trace with hash 803657603, now seen corresponding path program 1 times [2020-10-14 23:11:22,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:11:22,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336240708] [2020-10-14 23:11:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:11:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:11:22,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:22,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:22,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:24,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:24,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:24,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:11:24,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 23:11:24,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:11:24,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1989 [2020-10-14 23:11:24,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:11:24,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:11:24,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:11:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:11:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 23:11:24,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:11:24,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:11:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:11:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:24,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:11:24,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:11:24,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:11:24,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 23:11:24,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:11:24,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:11:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:11:24,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:11:24,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:11:24,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:11:24,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 23:11:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:11:24,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:24,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:11:25,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:11:25,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:11:25,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:11:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-14 23:11:25,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:11:25,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:11:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:11:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 23:11:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 23:11:25,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:11:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:11:25,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336240708] [2020-10-14 23:11:25,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:11:25,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:11:25,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976697331] [2020-10-14 23:11:25,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:11:25,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:11:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:11:25,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:11:25,117 INFO L87 Difference]: Start difference. First operand 3184 states and 4965 transitions. Second operand 6 states. [2020-10-14 23:12:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:12:13,613 INFO L93 Difference]: Finished difference Result 9370 states and 14717 transitions. [2020-10-14 23:12:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:12:13,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-10-14 23:12:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:12:13,648 INFO L225 Difference]: With dead ends: 9370 [2020-10-14 23:12:13,648 INFO L226 Difference]: Without dead ends: 6192 [2020-10-14 23:12:13,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:12:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2020-10-14 23:12:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 6158. [2020-10-14 23:12:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6158 states. [2020-10-14 23:12:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6158 states to 6158 states and 8530 transitions. [2020-10-14 23:12:13,840 INFO L78 Accepts]: Start accepts. Automaton has 6158 states and 8530 transitions. Word has length 96 [2020-10-14 23:12:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:12:13,842 INFO L479 AbstractCegarLoop]: Abstraction has 6158 states and 8530 transitions. [2020-10-14 23:12:13,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:12:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6158 states and 8530 transitions. [2020-10-14 23:12:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 23:12:13,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:12:13,851 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] [2020-10-14 23:12:13,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:12:13,852 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:12:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:12:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1022512321, now seen corresponding path program 1 times [2020-10-14 23:12:13,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:12:13,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360665763] [2020-10-14 23:12:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:12:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:12:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:12:14,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:12:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:12:14,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:12:14,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:12:14,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 23:12:14,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:12:14,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-14 23:12:14,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:12:14,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:12:14,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:12:14,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:12:14,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 23:12:14,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:12:14,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:12:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:12:14,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:12:14,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:12:14,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:12:14,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:12:14,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 23:12:14,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:12:14,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:12:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:12:14,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:12:14,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:12:14,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:12:15,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 23:12:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:12:15,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:12:15,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:12:15,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:12:15,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:12:15,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:12:15,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-14 23:12:15,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:12:15,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:12:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:12:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:12:15,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 23:12:15,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:12:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:12:15,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360665763] [2020-10-14 23:12:15,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:12:15,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:12:15,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934094348] [2020-10-14 23:12:15,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:12:15,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:12:15,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:12:15,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:12:15,376 INFO L87 Difference]: Start difference. First operand 6158 states and 8530 transitions. Second operand 7 states. [2020-10-14 23:13:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:13:44,162 INFO L93 Difference]: Finished difference Result 29538 states and 42444 transitions. [2020-10-14 23:13:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:13:44,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-14 23:13:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:13:44,307 INFO L225 Difference]: With dead ends: 29538 [2020-10-14 23:13:44,308 INFO L226 Difference]: Without dead ends: 23386 [2020-10-14 23:13:44,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:13:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23386 states. [2020-10-14 23:13:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23386 to 23258. [2020-10-14 23:13:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23258 states. [2020-10-14 23:13:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23258 states to 23258 states and 31169 transitions. [2020-10-14 23:13:45,322 INFO L78 Accepts]: Start accepts. Automaton has 23258 states and 31169 transitions. Word has length 96 [2020-10-14 23:13:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:13:45,326 INFO L479 AbstractCegarLoop]: Abstraction has 23258 states and 31169 transitions. [2020-10-14 23:13:45,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:13:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 23258 states and 31169 transitions. [2020-10-14 23:13:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 23:13:45,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:13:45,334 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] [2020-10-14 23:13:45,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:13:45,335 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:13:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:13:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash 194005264, now seen corresponding path program 1 times [2020-10-14 23:13:45,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:13:45,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583300312] [2020-10-14 23:13:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:13:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:13:45,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:13:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:13:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:13:46,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:13:46,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 23:13:46,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:13:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-14 23:13:46,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:13:46,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:13:46,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:13:46,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:13:46,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-14 23:13:46,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:13:46,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:13:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:13:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:13:46,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:13:46,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:13:46,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:13:46,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:13:46,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:13:46,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:13:46,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:13:46,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:13:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:13:46,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:13:46,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 23:13:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:13:46,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:13:46,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:13:46,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 23:13:46,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:13:46,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-14 23:13:46,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:13:46,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:13:46,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:13:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 23:13:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 23:13:46,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:13:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:13:46,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583300312] [2020-10-14 23:13:46,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:13:46,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:13:46,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161620779] [2020-10-14 23:13:46,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:13:46,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:13:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:13:46,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:13:46,984 INFO L87 Difference]: Start difference. First operand 23258 states and 31169 transitions. Second operand 7 states.