/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=SMALLEST --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 [2020-09-24 18:29:51,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:29:51,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:29:51,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:29:51,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:29:51,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:29:51,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:29:51,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:29:51,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:29:51,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:29:51,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:29:51,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:29:51,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:29:51,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:29:51,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:29:51,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:29:51,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:29:51,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:29:51,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:29:51,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:29:51,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:29:51,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:29:51,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:29:51,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:29:51,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:29:51,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:29:51,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:29:51,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:29:51,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:29:51,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:29:51,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:29:51,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:29:51,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:29:51,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:29:51,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:29:51,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:29:51,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:29:51,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:29:51,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:29:51,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:29:51,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:29:51,660 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 18:29:51,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:29:51,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:29:51,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:29:51,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:29:51,710 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:29:51,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:29:51,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:29:51,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:29:51,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:29:51,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:29:51,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:29:51,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:29:51,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:29:51,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:29:51,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:29:51,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:29:51,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:29:51,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:29:51,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:29:51,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:29:51,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:29:51,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:51,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:29:51,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:29:51,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:29:51,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:29:51,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:29:51,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:29:51,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:29:51,715 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:29:52,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:29:52,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:29:52,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:29:52,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:29:52,221 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:29:52,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-24 18:29:52,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3248e4224/9b9849b124764a8992f714b55989d1b8/FLAGd11e5702e [2020-09-24 18:29:52,864 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:29:52,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-24 18:29:52,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3248e4224/9b9849b124764a8992f714b55989d1b8/FLAGd11e5702e [2020-09-24 18:29:53,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3248e4224/9b9849b124764a8992f714b55989d1b8 [2020-09-24 18:29:53,239 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:29:53,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:29:53,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:53,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:29:53,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:29:53,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e62aa9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53, skipping insertion in model container [2020-09-24 18:29:53,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:29:53,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:29:53,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:53,502 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:29:53,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:53,540 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:29:53,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53 WrapperNode [2020-09-24 18:29:53,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:53,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:29:53,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:29:53,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:29:53,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:29:53,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:29:53,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:29:53,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:29:53,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (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 18:29:53,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:29:53,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:29:53,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:29:53,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:29:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:29:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:29:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:29:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:29:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:29:53,921 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:29:53,922 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:29:53,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:53 BoogieIcfgContainer [2020-09-24 18:29:53,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:29:53,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:29:53,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:29:53,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:29:53,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:29:53" (1/3) ... [2020-09-24 18:29:53,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc4b8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:53, skipping insertion in model container [2020-09-24 18:29:53,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (2/3) ... [2020-09-24 18:29:53,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc4b8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:53, skipping insertion in model container [2020-09-24 18:29:53,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:53" (3/3) ... [2020-09-24 18:29:53,936 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-09-24 18:29:53,948 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:29:53,958 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:29:53,985 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:29:54,020 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:29:54,020 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:29:54,020 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:29:54,021 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:29:54,021 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:29:54,021 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:29:54,022 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:29:54,022 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:29:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-24 18:29:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 18:29:54,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:54,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:54,067 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-24 18:29:54,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:54,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097715166] [2020-09-24 18:29:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:54,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:29:54,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:54,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-24 18:29:54,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:54,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:54,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 18:29:54,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:54,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:29:54,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:54,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:54,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:54,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:54,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:54,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:54,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:54,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:54,348 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 18:29:54,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097715166] [2020-09-24 18:29:54,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:54,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 18:29:54,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893794330] [2020-09-24 18:29:54,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 18:29:54,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:54,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 18:29:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 18:29:54,380 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-24 18:29:54,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:54,406 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-24 18:29:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 18:29:54,407 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-24 18:29:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:54,416 INFO L225 Difference]: With dead ends: 33 [2020-09-24 18:29:54,416 INFO L226 Difference]: Without dead ends: 16 [2020-09-24 18:29:54,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 18:29:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-24 18:29:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-24 18:29:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-24 18:29:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-24 18:29:54,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-24 18:29:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:54,470 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-24 18:29:54,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 18:29:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-24 18:29:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 18:29:54,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:54,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:54,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:29:54,471 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-24 18:29:54,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:54,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321480950] [2020-09-24 18:29:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:54,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:29:54,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:54,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-24 18:29:54,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:54,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:29:54,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:54,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 18:29:54,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:54,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:54,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:54,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:54,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:54,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:54,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:54,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:54,719 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 18:29:54,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321480950] [2020-09-24 18:29:54,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:54,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 18:29:54,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249871050] [2020-09-24 18:29:54,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 18:29:54,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 18:29:54,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:29:54,724 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-24 18:29:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:54,748 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-24 18:29:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 18:29:54,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-24 18:29:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:54,750 INFO L225 Difference]: With dead ends: 24 [2020-09-24 18:29:54,750 INFO L226 Difference]: Without dead ends: 19 [2020-09-24 18:29:54,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:29:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-24 18:29:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-24 18:29:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-24 18:29:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-24 18:29:54,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-24 18:29:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:54,758 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-24 18:29:54,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 18:29:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-24 18:29:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 18:29:54,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:54,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:54,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:29:54,760 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-24 18:29:54,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:54,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594750597] [2020-09-24 18:29:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:55,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:29:55,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:55,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-09-24 18:29:55,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:55,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:29:55,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:55,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:29:55,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:55,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:55,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:55,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:55,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:55,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:55,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:29:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:55,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594750597] [2020-09-24 18:29:55,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:55,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:29:55,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378190740] [2020-09-24 18:29:55,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:55,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:55,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:55,308 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-24 18:29:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:55,394 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-24 18:29:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:29:55,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 18:29:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:55,397 INFO L225 Difference]: With dead ends: 29 [2020-09-24 18:29:55,397 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 18:29:55,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 18:29:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-09-24 18:29:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 18:29:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 18:29:55,407 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 18:29:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:55,408 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 18:29:55,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 18:29:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 18:29:55,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:55,410 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:55,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:29:55,411 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-24 18:29:55,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:55,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816715479] [2020-09-24 18:29:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:55,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:56,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 18:29:56,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-09-24 18:29:56,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:29:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 18:29:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:56,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:56,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:56,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:56,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:56,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:29:56,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:56,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:29:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:56,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816715479] [2020-09-24 18:29:56,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:56,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:29:56,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028797222] [2020-09-24 18:29:56,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:29:56,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:29:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:56,237 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-24 18:29:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:56,335 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-24 18:29:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:29:56,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-24 18:29:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:56,336 INFO L225 Difference]: With dead ends: 34 [2020-09-24 18:29:56,337 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 18:29:56,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 18:29:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-24 18:29:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 18:29:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 18:29:56,344 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 18:29:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:56,344 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 18:29:56,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:29:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 18:29:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 18:29:56,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:56,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:56,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:29:56,346 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-24 18:29:56,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:56,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178833446] [2020-09-24 18:29:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 18:29:57,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:57,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-09-24 18:29:57,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:29:57,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:29:57,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 18:29:57,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:57,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:57,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:57,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:57,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:57,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:57,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:57,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:57,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178833446] [2020-09-24 18:29:57,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:57,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 18:29:57,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659609314] [2020-09-24 18:29:57,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:29:57,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:29:57,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:29:57,239 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-24 18:29:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:57,289 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-24 18:29:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:29:57,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-24 18:29:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:57,291 INFO L225 Difference]: With dead ends: 41 [2020-09-24 18:29:57,291 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 18:29:57,291 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 [2020-09-24 18:29:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 18:29:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-09-24 18:29:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 18:29:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 18:29:57,298 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 18:29:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:57,299 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 18:29:57,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:29:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 18:29:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 18:29:57,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:57,300 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:57,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:29:57,301 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:57,301 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-24 18:29:57,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:57,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438870860] [2020-09-24 18:29:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:58,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:58,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 18:29:58,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:58,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-09-24 18:29:58,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:58,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:29:58,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:29:58,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 18:29:58,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:58,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:58,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:58,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:58,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:58,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:58,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:58,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:58,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:58,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:58,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:58,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:58,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438870860] [2020-09-24 18:29:58,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:58,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:29:58,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143343818] [2020-09-24 18:29:58,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:29:58,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:29:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:29:58,205 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-09-24 18:29:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:58,294 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-24 18:29:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:29:58,296 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-24 18:29:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:58,297 INFO L225 Difference]: With dead ends: 46 [2020-09-24 18:29:58,298 INFO L226 Difference]: Without dead ends: 41 [2020-09-24 18:29:58,301 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 [2020-09-24 18:29:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-24 18:29:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-09-24 18:29:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 18:29:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 18:29:58,312 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-24 18:29:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:58,312 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 18:29:58,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:29:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 18:29:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 18:29:58,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:58,314 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:58,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:29:58,315 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-24 18:29:58,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:58,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991209691] [2020-09-24 18:29:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:58,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:58,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:59,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:59,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 18:29:59,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:59,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-09-24 18:29:59,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:59,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 18:29:59,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:29:59,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 18:29:59,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:59,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:59,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:59,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:59,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:59,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:59,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:59,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:59,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991209691] [2020-09-24 18:29:59,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:59,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 18:29:59,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194843096] [2020-09-24 18:29:59,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 18:29:59,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 18:29:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 18:29:59,609 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states. [2020-09-24 18:29:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:59,679 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-24 18:29:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 18:29:59,679 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-24 18:29:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:59,681 INFO L225 Difference]: With dead ends: 51 [2020-09-24 18:29:59,681 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 18:29:59,681 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 [2020-09-24 18:29:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 18:29:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-24 18:29:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 18:29:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 18:29:59,688 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-24 18:29:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:59,689 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 18:29:59,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 18:29:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 18:29:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 18:29:59,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:59,690 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:59,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:29:59,691 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-24 18:29:59,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:59,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537375419] [2020-09-24 18:29:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:29:59,704 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:29:59,705 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:29:59,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:29:59,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:29:59 BoogieIcfgContainer [2020-09-24 18:29:59,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:29:59,733 INFO L168 Benchmark]: Toolchain (without parser) took 6491.02 ms. Allocated memory was 141.0 MB in the beginning and 273.2 MB in the end (delta: 132.1 MB). Free memory was 104.3 MB in the beginning and 134.8 MB in the end (delta: -30.5 MB). Peak memory consumption was 101.6 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:59,734 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 18:29:59,735 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.61 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 93.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:59,736 INFO L168 Benchmark]: Boogie Preprocessor took 111.62 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.9 MB in the beginning and 183.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:59,736 INFO L168 Benchmark]: RCFGBuilder took 273.04 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 172.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:59,737 INFO L168 Benchmark]: TraceAbstraction took 5801.73 ms. Allocated memory was 204.5 MB in the beginning and 273.2 MB in the end (delta: 68.7 MB). Free memory was 171.3 MB in the beginning and 134.8 MB in the end (delta: 36.5 MB). Peak memory consumption was 105.2 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:59,741 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.61 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 93.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.62 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.9 MB in the beginning and 183.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.04 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 172.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5801.73 ms. Allocated memory was 204.5 MB in the beginning and 273.2 MB in the end (delta: 68.7 MB). Free memory was 171.3 MB in the beginning and 134.8 MB in the end (delta: 36.5 MB). Peak memory consumption was 105.2 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: 5.6s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 77 SDslu, 539 SDs, 0 SdLazy, 171 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 18995 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 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...