/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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:27:06,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:27:06,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:27:06,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:27:06,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:27:06,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:27:06,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:27:06,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:27:06,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:27:06,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:27:06,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:27:06,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:27:06,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:27:06,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:27:06,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:27:06,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:27:06,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:27:06,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:27:06,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:27:06,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:27:06,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:27:06,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:27:06,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:27:06,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:27:06,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:27:06,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:27:06,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:27:06,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:27:06,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:27:06,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:27:06,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:27:06,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:27:06,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:27:06,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:27:06,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:27:06,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:27:06,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:27:06,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:27:06,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:27:06,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:27:06,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:27:06,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 03:27:06,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:27:06,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:27:06,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:27:06,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:27:06,421 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:27:06,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:27:06,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:27:06,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:27:06,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:27:06,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:27:06,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:27:06,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:27:06,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:27:06,424 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:27:06,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:27:06,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:27:06,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:27:06,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:27:06,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:27:06,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:27:06,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:27:06,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:27:06,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:27:06,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:27:06,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:27:06,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:27:06,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:27:06,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:27:06,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:27:06,428 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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;log-additional-information=true; [2020-09-25 03:27:06,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:27:06,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:27:06,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:27:06,981 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:27:06,982 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:27:06,983 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-25 03:27:07,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/361dae737/b425f6e1a6cc4579ba1b8dcbeb9f07f1/FLAG29eb00fbf [2020-09-25 03:27:07,658 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:27:07,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-25 03:27:07,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/361dae737/b425f6e1a6cc4579ba1b8dcbeb9f07f1/FLAG29eb00fbf [2020-09-25 03:27:08,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/361dae737/b425f6e1a6cc4579ba1b8dcbeb9f07f1 [2020-09-25 03:27:08,025 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:27:08,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:27:08,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:27:08,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:27:08,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:27:08,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790fb128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08, skipping insertion in model container [2020-09-25 03:27:08,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:27:08,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:27:08,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:27:08,311 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:27:08,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:27:08,353 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:27:08,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08 WrapperNode [2020-09-25 03:27:08,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:27:08,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:27:08,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:27:08,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:27:08,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (1/1) ... [2020-09-25 03:27:08,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:27:08,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:27:08,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:27:08,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:27:08,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:27:08,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:27:08,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:27:08,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:27:08,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:27:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:27:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:27:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:27:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:27:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:27:08,786 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:27:08,787 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 03:27:08,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:27:08 BoogieIcfgContainer [2020-09-25 03:27:08,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:27:08,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:27:08,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:27:08,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:27:08,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:27:08" (1/3) ... [2020-09-25 03:27:08,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d88ecba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:27:08, skipping insertion in model container [2020-09-25 03:27:08,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:08" (2/3) ... [2020-09-25 03:27:08,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d88ecba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:27:08, skipping insertion in model container [2020-09-25 03:27:08,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:27:08" (3/3) ... [2020-09-25 03:27:08,809 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-09-25 03:27:08,830 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:27:08,841 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:27:08,870 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:27:08,911 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:27:08,912 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:27:08,912 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:27:08,912 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:27:08,912 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:27:08,913 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:27:08,913 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:27:08,913 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:27:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-25 03:27:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 03:27:08,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:08,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:08,951 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-25 03:27:08,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:08,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946514518] [2020-09-25 03:27:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:09,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:09,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 03:27:09,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:27:09,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-25 03:27:09,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:27:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:27:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:27:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 03:27:09,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:09,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:09,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:09,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:09,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:27:09,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:09,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:09,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:09,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:09,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:09,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946514518] [2020-09-25 03:27:09,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:27:09,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:27:09,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542524278] [2020-09-25 03:27:09,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:27:09,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:09,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:27:09,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:27:09,375 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-09-25 03:27:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:09,467 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-09-25 03:27:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:27:09,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-09-25 03:27:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:09,481 INFO L225 Difference]: With dead ends: 45 [2020-09-25 03:27:09,482 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 03:27:09,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:27:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 03:27:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-09-25 03:27:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 03:27:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 03:27:09,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-25 03:27:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:09,532 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 03:27:09,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:27:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 03:27:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 03:27:09,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:09,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:09,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:27:09,534 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:09,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-25 03:27:09,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:09,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064104412] [2020-09-25 03:27:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:09,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:10,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 03:27:10,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:27:10,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-09-25 03:27:10,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 03:27:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:27:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 03:27:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:10,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:10,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:10,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:10,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:10,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:27:10,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:10,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:10,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:10,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:10,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:10,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064104412] [2020-09-25 03:27:10,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:10,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 03:27:10,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317321689] [2020-09-25 03:27:10,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 03:27:10,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:10,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 03:27:10,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:27:10,161 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-09-25 03:27:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:10,207 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 03:27:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:27:10,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-25 03:27:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:10,209 INFO L225 Difference]: With dead ends: 31 [2020-09-25 03:27:10,209 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 03:27:10,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:27:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 03:27:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-09-25 03:27:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 03:27:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 03:27:10,217 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 03:27:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:10,218 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 03:27:10,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 03:27:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 03:27:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 03:27:10,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:10,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:10,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:27:10,220 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:10,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-25 03:27:10,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:10,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487354465] [2020-09-25 03:27:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:10,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:10,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 03:27:10,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:27:10,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-09-25 03:27:10,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:27:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:27:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 03:27:10,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:11,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:11,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:11,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:11,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:11,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:11,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:27:11,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:11,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:11,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487354465] [2020-09-25 03:27:11,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:11,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 03:27:11,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548421540] [2020-09-25 03:27:11,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 03:27:11,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:11,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 03:27:11,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:27:11,024 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-25 03:27:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:11,080 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 03:27:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 03:27:11,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-25 03:27:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:11,083 INFO L225 Difference]: With dead ends: 36 [2020-09-25 03:27:11,083 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 03:27:11,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:27:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 03:27:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 03:27:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 03:27:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 03:27:11,093 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 03:27:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:11,093 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 03:27:11,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 03:27:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 03:27:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 03:27:11,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:11,095 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:11,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:27:11,096 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:11,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:11,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-25 03:27:11,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:11,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133078227] [2020-09-25 03:27:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:11,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:11,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:11,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 03:27:11,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:27:11,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-09-25 03:27:11,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 03:27:11,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:27:11,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 03:27:11,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:11,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:11,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:11,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:11,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:27:11,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:11,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:11,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133078227] [2020-09-25 03:27:11,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:11,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:27:11,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94103202] [2020-09-25 03:27:11,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:27:11,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:27:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:27:11,980 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-25 03:27:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:12,034 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 03:27:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 03:27:12,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-25 03:27:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:12,036 INFO L225 Difference]: With dead ends: 41 [2020-09-25 03:27:12,036 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 03:27:12,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:27:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 03:27:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-09-25 03:27:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 03:27:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 03:27:12,044 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 03:27:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:12,044 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 03:27:12,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:27:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 03:27:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 03:27:12,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:12,046 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:12,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:27:12,046 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:12,047 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-25 03:27:12,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:12,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376394735] [2020-09-25 03:27:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:12,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:12,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:12,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:12,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 03:27:12,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:27:12,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-09-25 03:27:12,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:12,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:27:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:27:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 03:27:12,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:12,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:12,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:12,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:12,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:12,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:27:12,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:12,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:12,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376394735] [2020-09-25 03:27:12,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:12,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 03:27:12,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340347561] [2020-09-25 03:27:12,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 03:27:12,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:12,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 03:27:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:27:12,981 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-09-25 03:27:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:13,041 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 03:27:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 03:27:13,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-25 03:27:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:13,043 INFO L225 Difference]: With dead ends: 46 [2020-09-25 03:27:13,043 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 03:27:13,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:27:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 03:27:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-09-25 03:27:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 03:27:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 03:27:13,051 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 03:27:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:13,051 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 03:27:13,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 03:27:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 03:27:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 03:27:13,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:13,053 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:13,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:27:13,053 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:13,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-25 03:27:13,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:13,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230975055] [2020-09-25 03:27:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:13,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:13,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:14,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:14,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 03:27:14,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:27:14,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-09-25 03:27:14,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 03:27:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:27:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 03:27:14,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:14,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:14,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:14,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:14,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:14,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:14,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:27:14,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:14,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:14,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:14,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:14,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:14,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230975055] [2020-09-25 03:27:14,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:14,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:27:14,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859421539] [2020-09-25 03:27:14,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:27:14,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:14,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:27:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:27:14,334 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states. [2020-09-25 03:27:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:14,404 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 03:27:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 03:27:14,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-25 03:27:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:14,406 INFO L225 Difference]: With dead ends: 51 [2020-09-25 03:27:14,406 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 03:27:14,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:27:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 03:27:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-25 03:27:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 03:27:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 03:27:14,413 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 03:27:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:14,414 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 03:27:14,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:27:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 03:27:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 03:27:14,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:14,415 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:14,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:27:14,416 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:14,416 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-25 03:27:14,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:14,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691914429] [2020-09-25 03:27:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 03:27:14,430 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 03:27:14,430 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 03:27:14,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:27:14,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:27:14 BoogieIcfgContainer [2020-09-25 03:27:14,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:27:14,459 INFO L168 Benchmark]: Toolchain (without parser) took 6431.40 ms. Allocated memory was 138.4 MB in the beginning and 283.1 MB in the end (delta: 144.7 MB). Free memory was 101.7 MB in the beginning and 195.8 MB in the end (delta: -94.1 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:14,460 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 03:27:14,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.45 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 91.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:14,462 INFO L168 Benchmark]: Boogie Preprocessor took 138.97 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.7 MB in the beginning and 181.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:14,463 INFO L168 Benchmark]: RCFGBuilder took 296.04 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 169.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:14,464 INFO L168 Benchmark]: TraceAbstraction took 5662.66 ms. Allocated memory was 201.9 MB in the beginning and 283.1 MB in the end (delta: 81.3 MB). Free memory was 168.8 MB in the beginning and 195.8 MB in the end (delta: -27.1 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:14,468 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 324.45 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 91.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.97 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.7 MB in the beginning and 181.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.04 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 169.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5662.66 ms. Allocated memory was 201.9 MB in the beginning and 283.1 MB in the end (delta: 81.3 MB). Free memory was 168.8 MB in the beginning and 195.8 MB in the end (delta: -27.1 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L19] CALL __VERIFIER_assert(y != 64) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 129 SDtfs, 97 SDslu, 628 SDs, 0 SdLazy, 165 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 24 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 19625 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 0/115 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...