/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:28:54,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:28:54,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:28:54,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:28:54,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:28:54,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:28:54,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:28:54,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:28:54,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:28:54,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:28:54,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:28:54,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:28:54,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:28:54,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:28:54,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:28:54,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:28:54,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:28:54,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:28:54,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:28:54,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:28:54,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:28:54,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:28:54,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:28:54,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:28:54,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:28:54,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:28:54,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:28:54,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:28:54,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:28:54,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:28:54,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:28:54,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:28:54,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:28:54,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:28:54,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:28:54,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:28:54,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:28:54,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:28:54,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:28:54,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:28:54,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:28:54,296 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 [2020-09-24 20:28:54,335 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:28:54,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:28:54,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:28:54,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:28:54,337 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:28:54,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:28:54,338 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:28:54,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:28:54,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:28:54,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:28:54,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:28:54,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:28:54,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:28:54,339 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:28:54,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:28:54,339 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:28:54,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:28:54,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:28:54,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:28:54,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:28:54,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:28:54,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:28:54,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:28:54,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:28:54,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:28:54,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:28:54,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:28:54,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:28:54,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:28:54,342 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:28:54,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:28:54,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:28:54,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:28:54,850 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:28:54,851 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:28:54,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-09-24 20:28:54,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ab90e2a/d78cbea675e04ce9b1a51a255f088606/FLAG16bb4b4ce [2020-09-24 20:28:55,556 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:28:55,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-09-24 20:28:55,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ab90e2a/d78cbea675e04ce9b1a51a255f088606/FLAG16bb4b4ce [2020-09-24 20:28:55,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ab90e2a/d78cbea675e04ce9b1a51a255f088606 [2020-09-24 20:28:55,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:28:55,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:28:55,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:28:55,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:28:55,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:28:55,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:28:55" (1/1) ... [2020-09-24 20:28:55,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7302eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:55, skipping insertion in model container [2020-09-24 20:28:55,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:28:55" (1/1) ... [2020-09-24 20:28:55,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:28:55,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:28:56,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:28:56,244 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:28:56,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:28:56,291 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:28:56,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56 WrapperNode [2020-09-24 20:28:56,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:28:56,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:28:56,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:28:56,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:28:56,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (1/1) ... [2020-09-24 20:28:56,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (1/1) ... [2020-09-24 20:28:56,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (1/1) ... [2020-09-24 20:28:56,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (1/1) ... [2020-09-24 20:28:56,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (1/1) ... [2020-09-24 20:28:56,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (1/1) ... [2020-09-24 20:28:56,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (1/1) ... [2020-09-24 20:28:56,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:28:56,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:28:56,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:28:56,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:28:56,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (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 [2020-09-24 20:28:56,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:28:56,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:28:56,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-09-24 20:28:56,517 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-09-24 20:28:56,517 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-09-24 20:28:56,517 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-09-24 20:28:56,517 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-09-24 20:28:56,518 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-09-24 20:28:56,518 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-09-24 20:28:56,518 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-09-24 20:28:56,518 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-09-24 20:28:56,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:28:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:28:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-09-24 20:28:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:28:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-09-24 20:28:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-09-24 20:28:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-09-24 20:28:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-09-24 20:28:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-09-24 20:28:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-09-24 20:28:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-09-24 20:28:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-09-24 20:28:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:28:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:28:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:28:56,911 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:28:56,911 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:28:56,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:28:56 BoogieIcfgContainer [2020-09-24 20:28:56,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:28:56,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:28:56,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:28:56,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:28:56,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:28:55" (1/3) ... [2020-09-24 20:28:56,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acfa82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:28:56, skipping insertion in model container [2020-09-24 20:28:56,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:56" (2/3) ... [2020-09-24 20:28:56,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acfa82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:28:56, skipping insertion in model container [2020-09-24 20:28:56,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:28:56" (3/3) ... [2020-09-24 20:28:56,927 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-09-24 20:28:56,939 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:28:56,949 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:28:56,971 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:28:57,000 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:28:57,000 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:28:57,000 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:28:57,001 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:28:57,001 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:28:57,001 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:28:57,001 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:28:57,001 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:28:57,026 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-24 20:28:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 20:28:57,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:57,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:28:57,035 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:57,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1008214113, now seen corresponding path program 1 times [2020-09-24 20:28:57,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:57,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986262001] [2020-09-24 20:28:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:57,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:57,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:57,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:57,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 20:28:57,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:28:57,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-09-24 20:28:57,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:28:57,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-24 20:28:57,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 20:28:57,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:28:57,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:28:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:57,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:57,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:57,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:57,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:28:57,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:28:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:57,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 20:28:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:57,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:28:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:57,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:57,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:57,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:57,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:57,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 20:28:57,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:28:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:28:57,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:28:57,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986262001] [2020-09-24 20:28:57,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:28:57,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:28:57,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897581628] [2020-09-24 20:28:57,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:28:57,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:28:57,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:28:57,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:28:57,565 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 5 states. [2020-09-24 20:28:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:28:57,911 INFO L93 Difference]: Finished difference Result 265 states and 334 transitions. [2020-09-24 20:28:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:28:57,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-24 20:28:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:28:57,934 INFO L225 Difference]: With dead ends: 265 [2020-09-24 20:28:57,934 INFO L226 Difference]: Without dead ends: 164 [2020-09-24 20:28:57,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:28:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-24 20:28:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2020-09-24 20:28:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-24 20:28:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 190 transitions. [2020-09-24 20:28:58,033 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 190 transitions. Word has length 19 [2020-09-24 20:28:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:28:58,034 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 190 transitions. [2020-09-24 20:28:58,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:28:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 190 transitions. [2020-09-24 20:28:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 20:28:58,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:58,038 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] [2020-09-24 20:28:58,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:28:58,039 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1006142192, now seen corresponding path program 1 times [2020-09-24 20:28:58,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:58,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449688335] [2020-09-24 20:28:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:58,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:58,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:58,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:58,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 20:28:58,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:28:58,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-09-24 20:28:58,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:28:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 20:28:58,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:28:58,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:58,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:28:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:58,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:58,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:58,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:58,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:28:58,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:58,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:58,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:28:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:58,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:58,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:58,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:58,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:28:58,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:58,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:58,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 20:28:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:58,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:58,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:58,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:58,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:28:58,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:58,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:28:58,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:58,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 20:28:58,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:28:58,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449688335] [2020-09-24 20:28:58,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:28:58,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:28:58,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127247235] [2020-09-24 20:28:58,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:28:58,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:28:58,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:28:58,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:28:58,774 INFO L87 Difference]: Start difference. First operand 160 states and 190 transitions. Second operand 6 states. [2020-09-24 20:28:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:28:58,986 INFO L93 Difference]: Finished difference Result 279 states and 339 transitions. [2020-09-24 20:28:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:28:58,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-09-24 20:28:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:28:58,990 INFO L225 Difference]: With dead ends: 279 [2020-09-24 20:28:58,990 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 20:28:58,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:28:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 20:28:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2020-09-24 20:28:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 20:28:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-09-24 20:28:59,007 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 38 [2020-09-24 20:28:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:28:59,007 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-09-24 20:28:59,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:28:59,008 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-09-24 20:28:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 20:28:59,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:59,009 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] [2020-09-24 20:28:59,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:28:59,010 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:59,010 INFO L82 PathProgramCache]: Analyzing trace with hash -624757564, now seen corresponding path program 1 times [2020-09-24 20:28:59,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:59,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084076403] [2020-09-24 20:28:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 20:28:59,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:59,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 20:28:59,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:28:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:28:59,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 20:28:59,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:59,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:28:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:59,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:59,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:28:59,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:59,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:59,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:59,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:59,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:28:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:59,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:28:59,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:28:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:28:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:59,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 20:28:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:59,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:59,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:28:59,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:59,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 20:28:59,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:59,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:28:59,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084076403] [2020-09-24 20:28:59,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:28:59,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:28:59,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953003214] [2020-09-24 20:28:59,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:28:59,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:28:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:28:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:28:59,157 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 6 states. [2020-09-24 20:28:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:28:59,413 INFO L93 Difference]: Finished difference Result 251 states and 305 transitions. [2020-09-24 20:28:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:28:59,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-09-24 20:28:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:28:59,416 INFO L225 Difference]: With dead ends: 251 [2020-09-24 20:28:59,416 INFO L226 Difference]: Without dead ends: 173 [2020-09-24 20:28:59,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:28:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-24 20:28:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 112. [2020-09-24 20:28:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-24 20:28:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2020-09-24 20:28:59,431 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 38 [2020-09-24 20:28:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:28:59,431 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2020-09-24 20:28:59,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:28:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2020-09-24 20:28:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:28:59,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:59,434 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 20:28:59,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:28:59,435 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:59,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2144371133, now seen corresponding path program 1 times [2020-09-24 20:28:59,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:59,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062398613] [2020-09-24 20:28:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 20:28:59,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:28:59,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-09-24 20:28:59,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:28:59,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 20:28:59,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 20:28:59,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:59,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:28:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:59,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:59,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:28:59,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:59,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:59,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:28:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:59,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:59,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:28:59,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:59,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:59,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 20:28:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:28:59,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:59,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:28:59,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:28:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:28:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:59,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 20:28:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:59,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:59,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:28:59,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:59,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:28:59,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 20:28:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:28:59,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062398613] [2020-09-24 20:28:59,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:28:59,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 20:28:59,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066639583] [2020-09-24 20:28:59,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:28:59,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:28:59,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:28:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:28:59,788 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 8 states. [2020-09-24 20:29:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:29:00,120 INFO L93 Difference]: Finished difference Result 311 states and 383 transitions. [2020-09-24 20:29:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 20:29:00,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-24 20:29:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:29:00,123 INFO L225 Difference]: With dead ends: 311 [2020-09-24 20:29:00,123 INFO L226 Difference]: Without dead ends: 213 [2020-09-24 20:29:00,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:29:00,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-24 20:29:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 132. [2020-09-24 20:29:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-24 20:29:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2020-09-24 20:29:00,140 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 59 [2020-09-24 20:29:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:29:00,143 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2020-09-24 20:29:00,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:29:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2020-09-24 20:29:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 20:29:00,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:29:00,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-09-24 20:29:00,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:29:00,151 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:29:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:29:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash -204784227, now seen corresponding path program 1 times [2020-09-24 20:29:00,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:29:00,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26360713] [2020-09-24 20:29:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:29:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:00,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:00,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:00,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:01,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:01,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-24 20:29:01,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:29:01,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-09-24 20:29:01,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:01,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:29:01,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 20:29:01,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 20:29:01,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:29:01,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:29:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:01,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:01,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:01,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:29:01,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:29:01,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 20:29:01,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:29:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:29:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:29:01,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:29:01,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:29:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:01,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:01,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:29:01,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:29:01,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:29:01,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:01,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:29:01,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:29:01,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:29:01,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:29:01,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 20:29:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:01,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:01,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:01,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:29:01,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:29:01,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 20:29:01,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:01,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:29:01,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:29:01,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:29:01,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:29:01,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 20:29:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:01,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:01,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:01,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 20:29:01,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:29:01,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:29:01,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:01,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:29:01,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:29:01,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 20:29:01,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:29:01,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 20:29:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:01,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:01,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:01,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:29:01,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:29:01,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:29:01,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:29:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 20:29:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:29:01,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:29:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:29:01,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26360713] [2020-09-24 20:29:01,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:29:01,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:29:01,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41917416] [2020-09-24 20:29:01,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:29:01,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:29:01,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:29:01,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:29:01,352 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand 10 states. [2020-09-24 20:29:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:29:01,858 INFO L93 Difference]: Finished difference Result 491 states and 631 transitions. [2020-09-24 20:29:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 20:29:01,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-09-24 20:29:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:29:01,862 INFO L225 Difference]: With dead ends: 491 [2020-09-24 20:29:01,862 INFO L226 Difference]: Without dead ends: 373 [2020-09-24 20:29:01,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-09-24 20:29:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-09-24 20:29:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 172. [2020-09-24 20:29:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-24 20:29:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2020-09-24 20:29:01,877 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 79 [2020-09-24 20:29:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:29:01,878 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2020-09-24 20:29:01,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:29:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2020-09-24 20:29:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-24 20:29:01,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:29:01,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-09-24 20:29:01,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:29:01,881 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:29:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:29:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1350272370, now seen corresponding path program 1 times [2020-09-24 20:29:01,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:29:01,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239315045] [2020-09-24 20:29:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:29:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:29:01,903 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:29:01,904 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:29:01,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:29:01,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:29:01 BoogieIcfgContainer [2020-09-24 20:29:01,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:29:01,939 INFO L168 Benchmark]: Toolchain (without parser) took 6062.36 ms. Allocated memory was 139.5 MB in the beginning and 280.0 MB in the end (delta: 140.5 MB). Free memory was 102.7 MB in the beginning and 202.5 MB in the end (delta: -99.8 MB). Peak memory consumption was 40.7 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:01,940 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-24 20:29:01,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.95 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:01,942 INFO L168 Benchmark]: Boogie Preprocessor took 147.16 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 179.9 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:01,943 INFO L168 Benchmark]: RCFGBuilder took 475.08 ms. Allocated memory is still 201.9 MB. Free memory was 178.9 MB in the beginning and 157.8 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:01,944 INFO L168 Benchmark]: TraceAbstraction took 5016.22 ms. Allocated memory was 201.9 MB in the beginning and 280.0 MB in the end (delta: 78.1 MB). Free memory was 157.8 MB in the beginning and 202.5 MB in the end (delta: -44.7 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:01,948 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 411.95 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.16 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 179.9 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 475.08 ms. Allocated memory is still 201.9 MB. Free memory was 178.9 MB in the beginning and 157.8 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5016.22 ms. Allocated memory was 201.9 MB in the beginning and 280.0 MB in the end (delta: 78.1 MB). Free memory was 157.8 MB in the beginning and 202.5 MB in the end (delta: -44.7 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; [L74] int ldv_s_misc_fops_file_operations = 0; [L75] CALL my_init() [L69] open_called = 0 [L70] return 0; [L75] RET my_init() [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L81] COND TRUE ldv_s_misc_fops_file_operations==0 [L82] CALL misc_open() [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; [L82] RET misc_open() [L83] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L89] COND TRUE ldv_s_misc_fops_file_operations==1 [L90] CALL misc_read() [L52] return 0; [L90] RET misc_read() [L91] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L97] COND TRUE ldv_s_misc_fops_file_operations==2 [L98] CALL misc_llseek() [L48] return 0; [L98] RET misc_llseek() [L99] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: [L105] COND TRUE ldv_s_misc_fops_file_operations==3 [L106] CALL misc_release() [L34] COND FALSE !(\read(open_called)) [L41] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L17] ldv_mutex = 2 [L41] RET mutex_lock() [L42] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L16] CALL __blast_assert() [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 105 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 463 SDtfs, 914 SDslu, 1220 SDs, 0 SdLazy, 819 SolverSat, 224 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 388 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 334 NumberOfCodeBlocks, 334 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 228 ConstructedInterpolants, 0 QuantifiedInterpolants, 25266 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 21/31 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...