/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=NARROWEST --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_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:09:35,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:09:35,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:09:35,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:09:35,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:09:35,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:09:35,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:09:35,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:09:35,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:09:35,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:09:35,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:09:35,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:09:35,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:09:35,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:09:35,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:09:35,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:09:35,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:09:35,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:09:35,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:09:35,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:09:35,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:09:35,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:09:35,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:09:35,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:09:35,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:09:35,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:09:35,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:09:35,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:09:35,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:09:35,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:09:35,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:09:35,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:09:35,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:09:35,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:09:36,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:09:36,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:09:36,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:09:36,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:09:36,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:09:36,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:09:36,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:09:36,007 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 [2020-10-13 10:09:36,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:09:36,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:09:36,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:09:36,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:09:36,072 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:09:36,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:09:36,073 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:09:36,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:09:36,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:09:36,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:09:36,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:09:36,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:09:36,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:09:36,076 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:09:36,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:09:36,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:09:36,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:09:36,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:09:36,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:09:36,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:09:36,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:09:36,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:09:36,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:09:36,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:09:36,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:09:36,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:09:36,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:09:36,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:09:36,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:09:36,080 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:09:36,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:09:36,516 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:09:36,521 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:09:36,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:09:36,524 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:09:36,525 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label44.c [2020-10-13 10:09:36,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d03912d6/814fe1ab417d48a0b98cbc973144c01b/FLAG4a0e7aec0 [2020-10-13 10:09:38,005 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:09:38,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label44.c [2020-10-13 10:09:38,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d03912d6/814fe1ab417d48a0b98cbc973144c01b/FLAG4a0e7aec0 [2020-10-13 10:09:38,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d03912d6/814fe1ab417d48a0b98cbc973144c01b [2020-10-13 10:09:38,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:09:38,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:09:38,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:09:38,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:09:38,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:09:38,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:09:38" (1/1) ... [2020-10-13 10:09:38,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1571b016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:38, skipping insertion in model container [2020-10-13 10:09:38,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:09:38" (1/1) ... [2020-10-13 10:09:38,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:09:38,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:09:41,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:09:41,902 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:09:43,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:09:43,395 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:09:43,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43 WrapperNode [2020-10-13 10:09:43,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:09:43,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:09:43,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:09:43,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:09:43,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (1/1) ... [2020-10-13 10:09:43,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (1/1) ... [2020-10-13 10:09:43,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (1/1) ... [2020-10-13 10:09:43,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (1/1) ... [2020-10-13 10:09:43,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (1/1) ... [2020-10-13 10:09:43,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (1/1) ... [2020-10-13 10:09:44,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (1/1) ... [2020-10-13 10:09:44,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:09:44,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:09:44,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:09:44,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:09:44,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (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 [2020-10-13 10:09:44,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:09:44,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:09:44,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:09:44,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:09:44,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:09:44,232 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:09:44,232 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:09:44,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:09:44,233 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:09:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:09:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:09:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:09:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:09:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:09:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:09:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:09:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:09:44,235 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:09:44,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:09:44,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:09:44,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:10:00,771 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:10:00,771 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:10:00,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:10:00 BoogieIcfgContainer [2020-10-13 10:10:00,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:10:00,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:10:00,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:10:00,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:10:00,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:09:38" (1/3) ... [2020-10-13 10:10:00,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e2e0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:10:00, skipping insertion in model container [2020-10-13 10:10:00,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:43" (2/3) ... [2020-10-13 10:10:00,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e2e0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:10:00, skipping insertion in model container [2020-10-13 10:10:00,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:10:00" (3/3) ... [2020-10-13 10:10:00,808 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label44.c [2020-10-13 10:10:00,824 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:10:00,836 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:10:00,856 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:10:00,897 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:10:00,897 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:10:00,898 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:10:00,898 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:10:00,898 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:10:00,898 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:10:00,898 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:10:00,898 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:10:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:10:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:10:00,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:00,969 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] [2020-10-13 10:10:00,970 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1535599542, now seen corresponding path program 1 times [2020-10-13 10:10:00,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:00,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539076423] [2020-10-13 10:10:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:01,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:01,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:01,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:10:01,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-13 10:10:01,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:10:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:10:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:10:01,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 10:10:01,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:01,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:01,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:01,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:01,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:01,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 10:10:01,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:01,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:01,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:01,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:10:01,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:01,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539076423] [2020-10-13 10:10:01,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:10:01,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:10:01,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759972580] [2020-10-13 10:10:01,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:10:01,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:02,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:10:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:10:02,023 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:10:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:24,090 INFO L93 Difference]: Finished difference Result 5086 states and 9561 transitions. [2020-10-13 10:10:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:24,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-13 10:10:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:24,147 INFO L225 Difference]: With dead ends: 5086 [2020-10-13 10:10:24,148 INFO L226 Difference]: Without dead ends: 3245 [2020-10-13 10:10:24,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2020-10-13 10:10:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3178. [2020-10-13 10:10:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-10-13 10:10:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 5849 transitions. [2020-10-13 10:10:24,417 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 5849 transitions. Word has length 40 [2020-10-13 10:10:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:24,419 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 5849 transitions. [2020-10-13 10:10:24,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:10:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 5849 transitions. [2020-10-13 10:10:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 10:10:24,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:24,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:10:24,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:10:24,432 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash 220681975, now seen corresponding path program 1 times [2020-10-13 10:10:24,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:24,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323773060] [2020-10-13 10:10:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:24,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:24,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:25,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:25,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:10:25,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:10:25,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-13 10:10:25,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:25,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:25,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 10:10:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:10:25,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:25,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:25,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:25,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:25,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:25,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:25,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:10:25,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:25,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:25,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:25,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:25,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:25,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:10:25,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:25,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-13 10:10:25,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 10:10:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:10:25,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:25,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323773060] [2020-10-13 10:10:25,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:10:25,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:10:25,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054476579] [2020-10-13 10:10:25,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:10:25,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:10:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:25,673 INFO L87 Difference]: Start difference. First operand 3178 states and 5849 transitions. Second operand 5 states. [2020-10-13 10:10:59,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:59,007 INFO L93 Difference]: Finished difference Result 9268 states and 17278 transitions. [2020-10-13 10:10:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:59,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-13 10:10:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:59,043 INFO L225 Difference]: With dead ends: 9268 [2020-10-13 10:10:59,044 INFO L226 Difference]: Without dead ends: 6096 [2020-10-13 10:10:59,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:10:59,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6096 states. [2020-10-13 10:10:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6096 to 6030. [2020-10-13 10:10:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6030 states. [2020-10-13 10:10:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 10307 transitions. [2020-10-13 10:10:59,232 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 10307 transitions. Word has length 111 [2020-10-13 10:10:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:59,234 INFO L479 AbstractCegarLoop]: Abstraction has 6030 states and 10307 transitions. [2020-10-13 10:10:59,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:10:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 10307 transitions. [2020-10-13 10:10:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 10:10:59,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:59,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:10:59,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:10:59,246 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1111553389, now seen corresponding path program 1 times [2020-10-13 10:10:59,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:59,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017369954] [2020-10-13 10:10:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:59,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:59,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:00,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:00,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 10:11:00,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:11:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-13 10:11:00,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:11:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:11:00,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:11:00,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:00,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:00,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:00,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:00,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:00,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:00,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:11:00,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:11:00,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:00,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:11:00,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:00,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:00,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:00,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:00,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:11:00,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:00,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-13 10:11:00,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:00,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:00,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:00,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:11:00,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:00,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017369954] [2020-10-13 10:11:00,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:11:00,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:11:00,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116560828] [2020-10-13 10:11:00,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:11:00,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:11:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:11:00,424 INFO L87 Difference]: Start difference. First operand 6030 states and 10307 transitions. Second operand 5 states. [2020-10-13 10:11:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:11:33,473 INFO L93 Difference]: Finished difference Result 16305 states and 27896 transitions. [2020-10-13 10:11:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:11:33,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-13 10:11:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:11:33,527 INFO L225 Difference]: With dead ends: 16305 [2020-10-13 10:11:33,527 INFO L226 Difference]: Without dead ends: 10281 [2020-10-13 10:11:33,545 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 [2020-10-13 10:11:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10281 states. [2020-10-13 10:11:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10281 to 10276. [2020-10-13 10:11:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10276 states. [2020-10-13 10:11:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10276 states to 10276 states and 15151 transitions. [2020-10-13 10:11:33,826 INFO L78 Accepts]: Start accepts. Automaton has 10276 states and 15151 transitions. Word has length 116 [2020-10-13 10:11:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:11:33,830 INFO L479 AbstractCegarLoop]: Abstraction has 10276 states and 15151 transitions. [2020-10-13 10:11:33,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:11:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 10276 states and 15151 transitions. [2020-10-13 10:11:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 10:11:33,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:33,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:11:33,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:11:33,847 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1362923979, now seen corresponding path program 1 times [2020-10-13 10:11:33,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:33,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959897112] [2020-10-13 10:11:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:34,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:34,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:35,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:35,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 10:11:35,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:11:35,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1541 [2020-10-13 10:11:35,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:35,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:11:35,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-13 10:11:35,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:11:35,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:35,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:35,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:35,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:35,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:35,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:35,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:11:35,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:11:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:11:35,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:35,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:35,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:35,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:35,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:11:35,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:35,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-13 10:11:35,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 10:11:35,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:35,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959897112] [2020-10-13 10:11:35,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:11:35,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:11:35,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654401724] [2020-10-13 10:11:35,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:11:35,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:11:36,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:11:36,000 INFO L87 Difference]: Start difference. First operand 10276 states and 15151 transitions. Second operand 5 states. [2020-10-13 10:12:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:12:14,098 INFO L93 Difference]: Finished difference Result 20595 states and 30394 transitions. [2020-10-13 10:12:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:12:14,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-13 10:12:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:12:14,148 INFO L225 Difference]: With dead ends: 20595 [2020-10-13 10:12:14,148 INFO L226 Difference]: Without dead ends: 10280 [2020-10-13 10:12:14,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:12:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10280 states. [2020-10-13 10:12:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10280 to 10276. [2020-10-13 10:12:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10276 states. [2020-10-13 10:12:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10276 states to 10276 states and 15099 transitions. [2020-10-13 10:12:14,586 INFO L78 Accepts]: Start accepts. Automaton has 10276 states and 15099 transitions. Word has length 142 [2020-10-13 10:12:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:12:14,589 INFO L479 AbstractCegarLoop]: Abstraction has 10276 states and 15099 transitions. [2020-10-13 10:12:14,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:12:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 10276 states and 15099 transitions. [2020-10-13 10:12:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 10:12:14,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:12:14,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:12:14,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:12:14,593 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:12:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:12:14,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1404693187, now seen corresponding path program 1 times [2020-10-13 10:12:14,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:12:14,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270303578] [2020-10-13 10:12:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:12:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:14,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:14,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:15,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:15,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:15,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 10:12:15,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:12:15,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-13 10:12:15,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:12:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-13 10:12:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:12:15,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:15,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:12:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:15,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:15,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:15,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:12:15,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:15,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:12:15,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:12:15,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:15,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:12:15,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:16,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:12:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:16,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:16,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:16,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 10:12:16,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:16,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-13 10:12:16,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:16,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:16,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 10:12:16,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:12:16,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270303578] [2020-10-13 10:12:16,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:12:16,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:12:16,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745402502] [2020-10-13 10:12:16,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:12:16,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:12:16,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:12:16,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:12:16,269 INFO L87 Difference]: Start difference. First operand 10276 states and 15099 transitions. Second operand 5 states. [2020-10-13 10:12:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:12:58,341 INFO L93 Difference]: Finished difference Result 20595 states and 30294 transitions. [2020-10-13 10:12:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:12:58,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-10-13 10:12:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:12:58,386 INFO L225 Difference]: With dead ends: 20595 [2020-10-13 10:12:58,386 INFO L226 Difference]: Without dead ends: 10280 [2020-10-13 10:12:58,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:12:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10280 states. [2020-10-13 10:12:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10280 to 10276. [2020-10-13 10:12:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10276 states. [2020-10-13 10:12:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10276 states to 10276 states and 14877 transitions. [2020-10-13 10:12:58,680 INFO L78 Accepts]: Start accepts. Automaton has 10276 states and 14877 transitions. Word has length 146 [2020-10-13 10:12:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:12:58,681 INFO L479 AbstractCegarLoop]: Abstraction has 10276 states and 14877 transitions. [2020-10-13 10:12:58,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:12:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 10276 states and 14877 transitions. [2020-10-13 10:12:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 10:12:58,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:12:58,689 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:12:58,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:12:58,690 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:12:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:12:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash -870289105, now seen corresponding path program 1 times [2020-10-13 10:12:58,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:12:58,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059404394] [2020-10-13 10:12:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:12:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:58,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:59,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:59,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:59,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:59,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 10:12:59,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:12:59,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-13 10:12:59,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:59,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:12:59,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-13 10:12:59,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:12:59,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:13:00,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:13:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:00,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:00,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:00,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:13:00,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:13:00,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:13:00,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:13:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:13:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:13:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:13:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:13:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:00,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:00,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:00,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 10:13:00,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:13:00,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-13 10:13:00,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:00,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:13:00,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:13:00,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-13 10:13:00,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:13:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:13:00,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059404394] [2020-10-13 10:13:00,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:13:00,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:13:00,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32437943] [2020-10-13 10:13:00,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:13:00,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:13:00,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:13:00,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:13:00,775 INFO L87 Difference]: Start difference. First operand 10276 states and 14877 transitions. Second operand 5 states. [2020-10-13 10:13:02,581 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50