/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 SingleStatement --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=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:08:19,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:08:19,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:08:19,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:08:19,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:08:19,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:08:19,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:08:19,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:08:19,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:08:19,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:08:19,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:08:19,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:08:19,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:08:19,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:08:19,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:08:19,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:08:19,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:08:19,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:08:19,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:08:19,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:08:19,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:08:19,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:08:19,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:08:19,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:08:19,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:08:19,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:08:19,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:08:19,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:08:19,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:08:19,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:08:19,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:08:19,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:08:19,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:08:19,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:08:19,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:08:19,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:08:19,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:08:19,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:08:19,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:08:19,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:08:19,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:08:19,939 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 [2020-09-25 10:08:19,985 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:08:19,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:08:19,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:08:19,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:08:19,989 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:08:19,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:08:19,989 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:08:19,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:08:19,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:08:19,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:08:19,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:08:19,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:08:19,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:08:19,992 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:08:19,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:08:19,992 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:08:19,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:08:19,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:08:19,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:08:19,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:08:19,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:08:19,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:08:19,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:08:19,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:08:19,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:08:19,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:08:19,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:08:19,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:08:19,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:08:19,995 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 -> SingleStatement 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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=true; [2020-09-25 10:08:20,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:08:20,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:08:20,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:08:20,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:08:20,461 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:08:20,462 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2020-09-25 10:08:20,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d5a3f17/881e0dc1e1ca4d64b9ea394b8940324e/FLAG56ce0add2 [2020-09-25 10:08:21,262 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:08:21,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2020-09-25 10:08:21,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d5a3f17/881e0dc1e1ca4d64b9ea394b8940324e/FLAG56ce0add2 [2020-09-25 10:08:21,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d5a3f17/881e0dc1e1ca4d64b9ea394b8940324e [2020-09-25 10:08:21,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:08:21,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:08:21,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:08:21,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:08:21,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:08:21,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:08:21" (1/1) ... [2020-09-25 10:08:21,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bc88a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:21, skipping insertion in model container [2020-09-25 10:08:21,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:08:21" (1/1) ... [2020-09-25 10:08:21,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:08:21,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:08:22,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:08:22,099 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:08:22,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:08:22,271 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:08:22,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22 WrapperNode [2020-09-25 10:08:22,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:08:22,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:08:22,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:08:22,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:08:22,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (1/1) ... [2020-09-25 10:08:22,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (1/1) ... [2020-09-25 10:08:22,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (1/1) ... [2020-09-25 10:08:22,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (1/1) ... [2020-09-25 10:08:22,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (1/1) ... [2020-09-25 10:08:22,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (1/1) ... [2020-09-25 10:08:22,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (1/1) ... [2020-09-25 10:08:22,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:08:22,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:08:22,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:08:22,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:08:22,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (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 [2020-09-25 10:08:22,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:08:22,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:08:22,476 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 10:08:22,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:08:22,476 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 10:08:22,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:08:22,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:08:22,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:08:22,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:08:22,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:08:22,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:08:23,941 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:08:23,941 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:08:23,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:08:23 BoogieIcfgContainer [2020-09-25 10:08:23,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:08:23,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:08:23,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:08:23,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:08:23,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:08:21" (1/3) ... [2020-09-25 10:08:23,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63360cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:08:23, skipping insertion in model container [2020-09-25 10:08:23,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:22" (2/3) ... [2020-09-25 10:08:23,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63360cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:08:23, skipping insertion in model container [2020-09-25 10:08:23,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:08:23" (3/3) ... [2020-09-25 10:08:23,960 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label09.c [2020-09-25 10:08:23,972 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:08:23,984 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:08:24,007 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:08:24,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:08:24,042 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:08:24,043 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:08:24,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:08:24,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:08:24,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:08:24,043 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:08:24,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:08:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 10:08:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-25 10:08:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:24,116 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] [2020-09-25 10:08:24,116 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash -260189822, now seen corresponding path program 1 times [2020-09-25 10:08:24,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:24,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486798509] [2020-09-25 10:08:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:24,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:24,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:25,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:25,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:27,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:28,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:28,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:29,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:29,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-09-25 10:08:29,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 10:08:29,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 10:08:29,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:29,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:29,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:08:29,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 10:08:29,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-09-25 10:08:29,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 10:08:29,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:29,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:29,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:29,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:29,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:29,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 10:08:29,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:29,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:08:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:08:29,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:08:29,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486798509] [2020-09-25 10:08:29,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:08:29,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:08:29,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899542521] [2020-09-25 10:08:29,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:08:29,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:29,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:08:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:08:29,792 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 10:08:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:31,999 INFO L93 Difference]: Finished difference Result 1205 states and 1651 transitions. [2020-09-25 10:08:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:08:32,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-09-25 10:08:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:32,039 INFO L225 Difference]: With dead ends: 1205 [2020-09-25 10:08:32,039 INFO L226 Difference]: Without dead ends: 627 [2020-09-25 10:08:32,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:08:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-09-25 10:08:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 613. [2020-09-25 10:08:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-09-25 10:08:32,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 759 transitions. [2020-09-25 10:08:32,176 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 759 transitions. Word has length 147 [2020-09-25 10:08:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:32,178 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 759 transitions. [2020-09-25 10:08:32,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:08:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 759 transitions. [2020-09-25 10:08:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 10:08:32,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:32,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:08:32,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:08:32,187 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:32,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1869570329, now seen corresponding path program 1 times [2020-09-25 10:08:32,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:32,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634235503] [2020-09-25 10:08:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:32,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:36,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:36,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:37,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:37,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-25 10:08:37,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:08:37,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 10:08:37,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:37,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:37,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-09-25 10:08:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-25 10:08:37,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:37,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:37,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:37,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:37,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:37,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 10:08:37,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:37,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:37,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:37,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 10:08:37,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:08:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:37,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:37,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:37,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 10:08:37,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:37,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 10:08:37,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:37,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:37,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:08:37,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:37,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 10:08:37,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:08:37,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634235503] [2020-09-25 10:08:37,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:37,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 10:08:37,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373443206] [2020-09-25 10:08:37,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:08:37,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:37,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:08:37,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:08:37,549 INFO L87 Difference]: Start difference. First operand 613 states and 759 transitions. Second operand 5 states. [2020-09-25 10:08:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:39,871 INFO L93 Difference]: Finished difference Result 1680 states and 2139 transitions. [2020-09-25 10:08:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:08:39,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2020-09-25 10:08:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:39,888 INFO L225 Difference]: With dead ends: 1680 [2020-09-25 10:08:39,888 INFO L226 Difference]: Without dead ends: 1089 [2020-09-25 10:08:39,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:08:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-09-25 10:08:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 968. [2020-09-25 10:08:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-09-25 10:08:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1232 transitions. [2020-09-25 10:08:39,945 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1232 transitions. Word has length 181 [2020-09-25 10:08:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:39,946 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1232 transitions. [2020-09-25 10:08:39,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:08:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1232 transitions. [2020-09-25 10:08:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-25 10:08:39,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:39,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:08:39,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:08:39,953 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1640166086, now seen corresponding path program 1 times [2020-09-25 10:08:39,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:39,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050375736] [2020-09-25 10:08:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:40,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:40,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:41,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:41,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:44,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:44,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-09-25 10:08:44,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:08:44,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 10:08:45,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:45,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-09-25 10:08:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-09-25 10:08:45,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:45,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:45,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:45,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:45,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:45,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 10:08:45,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:45,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:45,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:45,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:45,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:45,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:08:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:45,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:45,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 10:08:45,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:45,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 10:08:45,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:45,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:08:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 10:08:45,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:08:45,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050375736] [2020-09-25 10:08:45,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:45,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 10:08:45,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13320795] [2020-09-25 10:08:45,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:08:45,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:45,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:08:45,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:08:45,378 INFO L87 Difference]: Start difference. First operand 968 states and 1232 transitions. Second operand 5 states. [2020-09-25 10:08:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:47,576 INFO L93 Difference]: Finished difference Result 2531 states and 3381 transitions. [2020-09-25 10:08:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:08:47,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2020-09-25 10:08:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:47,602 INFO L225 Difference]: With dead ends: 2531 [2020-09-25 10:08:47,603 INFO L226 Difference]: Without dead ends: 1585 [2020-09-25 10:08:47,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:08:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-09-25 10:08:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1573. [2020-09-25 10:08:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1573 states. [2020-09-25 10:08:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 2030 transitions. [2020-09-25 10:08:47,688 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 2030 transitions. Word has length 185 [2020-09-25 10:08:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:47,689 INFO L479 AbstractCegarLoop]: Abstraction has 1573 states and 2030 transitions. [2020-09-25 10:08:47,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:08:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 2030 transitions. [2020-09-25 10:08:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-25 10:08:47,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:47,699 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 10:08:47,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:08:47,701 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:47,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1032028468, now seen corresponding path program 1 times [2020-09-25 10:08:47,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:47,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458250513] [2020-09-25 10:08:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:47,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:47,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:47,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:48,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:52,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:52,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-09-25 10:08:52,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:08:52,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-25 10:08:52,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:52,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:52,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 10:08:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-09-25 10:08:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-25 10:08:52,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:08:53,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:53,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:53,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:53,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 10:08:53,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:53,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:53,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:53,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:08:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:53,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:53,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:53,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 10:08:53,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:53,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 10:08:53,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:53,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:53,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:53,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:53,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:53,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:08:53,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 10:08:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:53,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:53,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 10:08:53,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:53,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-25 10:08:53,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:53,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:53,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 10:08:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 10:08:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:08:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-25 10:08:53,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458250513] [2020-09-25 10:08:53,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:53,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 10:08:53,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815649831] [2020-09-25 10:08:53,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 10:08:53,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 10:08:53,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 10:08:53,588 INFO L87 Difference]: Start difference. First operand 1573 states and 2030 transitions. Second operand 8 states. [2020-09-25 10:08:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:56,661 INFO L93 Difference]: Finished difference Result 3536 states and 4684 transitions. [2020-09-25 10:08:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 10:08:56,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 225 [2020-09-25 10:08:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:56,677 INFO L225 Difference]: With dead ends: 3536 [2020-09-25 10:08:56,677 INFO L226 Difference]: Without dead ends: 1887 [2020-09-25 10:08:56,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:08:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2020-09-25 10:08:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1869. [2020-09-25 10:08:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1869 states. [2020-09-25 10:08:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2350 transitions. [2020-09-25 10:08:56,754 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2350 transitions. Word has length 225 [2020-09-25 10:08:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:56,756 INFO L479 AbstractCegarLoop]: Abstraction has 1869 states and 2350 transitions. [2020-09-25 10:08:56,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 10:08:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2350 transitions. [2020-09-25 10:08:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-09-25 10:08:56,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:56,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:08:56,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:08:56,769 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1501426121, now seen corresponding path program 1 times [2020-09-25 10:08:56,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:56,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109896099] [2020-09-25 10:08:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:56,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:57,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:00,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:00,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:01,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:01,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-09-25 10:09:01,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:09:01,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 10:09:01,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:01,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 10:09:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 10:09:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-09-25 10:09:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:09:02,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:09:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:02,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:02,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:02,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:09:02,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:09:02,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-25 10:09:02,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:02,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:02,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:09:02,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:09:02,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:09:02,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:02,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:09:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:02,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:02,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:02,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:02,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 10:09:02,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:09:02,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-09-25 10:09:02,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:02,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:02,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:09:02,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:09:02,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 10:09:02,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:09:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:09:02,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109896099] [2020-09-25 10:09:02,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:09:02,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 10:09:02,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838343765] [2020-09-25 10:09:02,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 10:09:02,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:09:02,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 10:09:02,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-25 10:09:02,883 INFO L87 Difference]: Start difference. First operand 1869 states and 2350 transitions. Second operand 13 states. [2020-09-25 10:09:03,233 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-25 10:09:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:09:09,092 INFO L93 Difference]: Finished difference Result 5214 states and 6866 transitions. [2020-09-25 10:09:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 10:09:09,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 231 [2020-09-25 10:09:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:09:09,117 INFO L225 Difference]: With dead ends: 5214 [2020-09-25 10:09:09,117 INFO L226 Difference]: Without dead ends: 3367 [2020-09-25 10:09:09,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-09-25 10:09:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2020-09-25 10:09:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2713. [2020-09-25 10:09:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2713 states. [2020-09-25 10:09:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3363 transitions. [2020-09-25 10:09:09,233 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3363 transitions. Word has length 231 [2020-09-25 10:09:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:09:09,234 INFO L479 AbstractCegarLoop]: Abstraction has 2713 states and 3363 transitions. [2020-09-25 10:09:09,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 10:09:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3363 transitions. [2020-09-25 10:09:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-09-25 10:09:09,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:09:09,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:09:09,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:09:09,247 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:09:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:09:09,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2102985712, now seen corresponding path program 1 times [2020-09-25 10:09:09,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:09:09,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212010222] [2020-09-25 10:09:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:09:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat