/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 22:38:14,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 22:38:14,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 22:38:14,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 22:38:14,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 22:38:14,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 22:38:14,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 22:38:14,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 22:38:14,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 22:38:14,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 22:38:14,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 22:38:14,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 22:38:14,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 22:38:14,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 22:38:14,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 22:38:14,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 22:38:14,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 22:38:14,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 22:38:14,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 22:38:14,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 22:38:14,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 22:38:14,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 22:38:14,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 22:38:14,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 22:38:14,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 22:38:14,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 22:38:14,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 22:38:14,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 22:38:14,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 22:38:14,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 22:38:14,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 22:38:14,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 22:38:14,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 22:38:14,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 22:38:14,747 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 22:38:14,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 22:38:14,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 22:38:14,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 22:38:14,750 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 22:38:14,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 22:38:14,750 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 22:38:14,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 22:38:14,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 22:38:14,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 22:38:14,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 22:38:14,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 22:38:14,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 22:38:14,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 22:38:14,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 22:38:14,752 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 22:38:14,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 22:38:14,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 22:38:14,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 22:38:14,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 22:38:14,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 22:38:14,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:38:14,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 22:38:14,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 22:38:14,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 22:38:14,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 22:38:14,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 22:38:14,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 22:38:14,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 22:38:14,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 22:38:15,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 22:38:15,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 22:38:15,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 22:38:15,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 22:38:15,178 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 22:38:15,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-27 22:38:15,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ab42084c/17e6bd7b68ad4fad9e990df9d3670103/FLAG5ff4ecff7 [2020-10-27 22:38:15,918 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 22:38:15,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-27 22:38:15,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ab42084c/17e6bd7b68ad4fad9e990df9d3670103/FLAG5ff4ecff7 [2020-10-27 22:38:16,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ab42084c/17e6bd7b68ad4fad9e990df9d3670103 [2020-10-27 22:38:16,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 22:38:16,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 22:38:16,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 22:38:16,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 22:38:16,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 22:38:16,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e5a2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16, skipping insertion in model container [2020-10-27 22:38:16,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 22:38:16,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 22:38:16,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:38:16,499 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 22:38:16,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:38:16,534 INFO L208 MainTranslator]: Completed translation [2020-10-27 22:38:16,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16 WrapperNode [2020-10-27 22:38:16,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 22:38:16,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 22:38:16,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 22:38:16,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 22:38:16,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (1/1) ... [2020-10-27 22:38:16,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 22:38:16,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 22:38:16,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 22:38:16,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 22:38:16,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:38:16,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 22:38:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 22:38:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 22:38:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-27 22:38:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 22:38:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 22:38:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 22:38:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 22:38:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 22:38:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 22:38:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-27 22:38:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 22:38:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 22:38:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 22:38:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 22:38:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 22:38:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 22:38:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 22:38:16,995 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 22:38:16,995 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 22:38:16,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:38:16 BoogieIcfgContainer [2020-10-27 22:38:16,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 22:38:17,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 22:38:17,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 22:38:17,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 22:38:17,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:38:16" (1/3) ... [2020-10-27 22:38:17,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368f5f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:38:17, skipping insertion in model container [2020-10-27 22:38:17,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:38:16" (2/3) ... [2020-10-27 22:38:17,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368f5f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:38:17, skipping insertion in model container [2020-10-27 22:38:17,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:38:16" (3/3) ... [2020-10-27 22:38:17,013 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-10-27 22:38:17,026 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 22:38:17,031 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 22:38:17,049 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 22:38:17,093 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 22:38:17,093 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 22:38:17,093 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 22:38:17,093 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 22:38:17,093 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 22:38:17,094 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 22:38:17,094 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 22:38:17,094 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 22:38:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 22:38:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 22:38:17,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:38:17,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:38:17,130 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:38:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:38:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-27 22:38:17,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:38:17,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148694421] [2020-10-27 22:38:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:38:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:17,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:18,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:18,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 22:38:18,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:38:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-27 22:38:18,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:18,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:38:18,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 22:38:18,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:38:18,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 22:38:18,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:38:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:18,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:18,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:18,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:38:18,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:18,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:38:18,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:38:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:18,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:38:18,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:38:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:18,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:18,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:18,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:38:18,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:18,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 22:38:18,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:18,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:38:18,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:18,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:38:18,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:38:18,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148694421] [2020-10-27 22:38:18,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:38:18,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 22:38:18,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89896183] [2020-10-27 22:38:18,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 22:38:18,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:38:18,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 22:38:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 22:38:18,413 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-27 22:38:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:38:18,749 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-27 22:38:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 22:38:18,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 22:38:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:38:18,761 INFO L225 Difference]: With dead ends: 38 [2020-10-27 22:38:18,761 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 22:38:18,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 22:38:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 22:38:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 22:38:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 22:38:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 22:38:18,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-27 22:38:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:38:18,817 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 22:38:18,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 22:38:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 22:38:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 22:38:18,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:38:18,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:38:18,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 22:38:18,820 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:38:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:38:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-27 22:38:18,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:38:18,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773313051] [2020-10-27 22:38:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:38:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:18,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:18,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:19,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:19,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 22:38:19,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:38:19,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-27 22:38:19,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:19,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:38:19,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 22:38:19,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:38:19,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:19,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:38:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:19,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:19,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:38:19,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:19,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 22:38:19,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:38:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:38:19,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:19,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:38:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:19,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:19,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:19,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 22:38:19,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 22:38:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:38:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 22:38:19,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:19,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:19,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:19,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:19,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:38:19,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:19,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:38:19,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:19,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:38:19,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:19,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:38:19,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 22:38:19,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773313051] [2020-10-27 22:38:19,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:38:19,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 22:38:19,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121297813] [2020-10-27 22:38:19,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 22:38:19,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:38:19,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 22:38:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:38:19,825 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-27 22:38:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:38:20,251 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-27 22:38:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 22:38:20,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 22:38:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:38:20,254 INFO L225 Difference]: With dead ends: 28 [2020-10-27 22:38:20,254 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 22:38:20,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 22:38:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 22:38:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 22:38:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 22:38:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 22:38:20,263 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-27 22:38:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:38:20,264 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 22:38:20,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 22:38:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 22:38:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 22:38:20,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:38:20,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:38:20,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 22:38:20,266 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:38:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:38:20,267 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-27 22:38:20,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:38:20,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685307384] [2020-10-27 22:38:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:38:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:20,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:20,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 22:38:20,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:38:20,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-27 22:38:20,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 22:38:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 22:38:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 22:38:20,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:21,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:38:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:21,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:21,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:21,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:38:21,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:21,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:38:21,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:21,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:38:21,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:21,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:38:21,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:21,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:38:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:21,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:21,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:21,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 22:38:21,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 22:38:21,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:38:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 22:38:21,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:21,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:21,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:21,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:21,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 22:38:21,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:21,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 22:38:21,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:21,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:38:21,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:21,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 22:38:21,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:21,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:21,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:21,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:38:21,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:38:21,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:38:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:38:21,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 22:38:21,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685307384] [2020-10-27 22:38:21,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:38:21,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 22:38:21,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284398615] [2020-10-27 22:38:21,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 22:38:21,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:38:21,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 22:38:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 22:38:21,239 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2020-10-27 22:38:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:38:21,767 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-27 22:38:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 22:38:21,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 22:38:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:38:21,769 INFO L225 Difference]: With dead ends: 31 [2020-10-27 22:38:21,769 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 22:38:21,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 22:38:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 22:38:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 22:38:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 22:38:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-27 22:38:21,792 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-27 22:38:21,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:38:21,793 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-27 22:38:21,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 22:38:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-27 22:38:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 22:38:21,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:38:21,794 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:38:21,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 22:38:21,795 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:38:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:38:21,795 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-27 22:38:21,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:38:21,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175032964] [2020-10-27 22:38:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:38:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:21,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:21,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:22,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:22,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 22:38:22,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:38:22,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1146 [2020-10-27 22:38:22,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:22,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:38:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 22:38:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:38:22,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:23,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:38:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:23,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:23,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:38:23,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:23,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:38:23,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:38:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:38:23,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:23,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:38:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:23,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:23,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:23,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 22:38:23,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:23,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 22:38:23,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:23,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:38:23,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:23,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 22:38:23,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:23,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:23,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:23,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:23,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 22:38:23,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 22:38:23,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:38:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 22:38:23,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:23,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:23,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:23,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:23,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 22:38:23,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 22:38:23,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:38:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 22:38:23,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:23,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:23,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:23,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:38:23,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:23,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:38:23,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:23,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:38:23,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:23,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:38:23,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 22:38:23,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175032964] [2020-10-27 22:38:23,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:38:23,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 22:38:23,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112313414] [2020-10-27 22:38:23,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 22:38:23,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:38:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 22:38:23,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 22:38:23,349 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-27 22:38:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:38:23,994 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-27 22:38:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 22:38:23,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 22:38:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:38:23,996 INFO L225 Difference]: With dead ends: 34 [2020-10-27 22:38:23,996 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 22:38:23,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-27 22:38:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 22:38:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 22:38:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 22:38:24,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 22:38:24,006 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-27 22:38:24,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:38:24,006 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 22:38:24,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 22:38:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 22:38:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 22:38:24,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:38:24,008 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:38:24,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 22:38:24,009 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:38:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:38:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-10-27 22:38:24,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:38:24,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450853551] [2020-10-27 22:38:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:38:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:24,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:24,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:25,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:25,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 22:38:25,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:38:25,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-27 22:38:25,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 22:38:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 22:38:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 22:38:25,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:25,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:38:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:25,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:25,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:38:25,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:25,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:38:25,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:38:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:38:25,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:25,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:38:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:25,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:25,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 22:38:25,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:25,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 22:38:25,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 22:38:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 22:38:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:25,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:25,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:25,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:25,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 22:38:25,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:25,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 22:38:25,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:25,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:38:25,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:25,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 22:38:25,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:25,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:25,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:25,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:25,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 22:38:25,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:25,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 22:38:25,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:38:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 22:38:25,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:25,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:25,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:25,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 22:38:25,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:25,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 22:38:25,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:38:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 22:38:25,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:25,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:38:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:38:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:38:25,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:38:25,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:38:25,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:38:25,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:38:25,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:38:25,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:38:25,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:38:25,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:38:25,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:38:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 22:38:25,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450853551] [2020-10-27 22:38:25,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:38:25,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 22:38:25,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173469666] [2020-10-27 22:38:25,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 22:38:25,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:38:25,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 22:38:25,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-27 22:38:25,410 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2020-10-27 22:38:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:38:25,936 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-27 22:38:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 22:38:25,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 22:38:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:38:25,939 INFO L225 Difference]: With dead ends: 37 [2020-10-27 22:38:25,939 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 22:38:25,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-10-27 22:38:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 22:38:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 22:38:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 22:38:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-27 22:38:25,948 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-27 22:38:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:38:25,949 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-27 22:38:25,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 22:38:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-27 22:38:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 22:38:25,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:38:25,951 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:38:25,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 22:38:25,951 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:38:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:38:25,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-10-27 22:38:25,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:38:25,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448107634] [2020-10-27 22:38:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:38:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 22:38:25,965 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 22:38:25,965 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 22:38:25,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 22:38:25,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 10:38:25 BoogieIcfgContainer [2020-10-27 22:38:25,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 22:38:25,991 INFO L168 Benchmark]: Toolchain (without parser) took 9711.51 ms. Allocated memory was 160.4 MB in the beginning and 282.1 MB in the end (delta: 121.6 MB). Free memory was 135.8 MB in the beginning and 213.8 MB in the end (delta: -78.0 MB). Peak memory consumption was 45.3 MB. Max. memory is 8.0 GB. [2020-10-27 22:38:25,991 INFO L168 Benchmark]: CDTParser took 1.60 ms. Allocated memory is still 160.4 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 22:38:25,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.73 ms. Allocated memory is still 160.4 MB. Free memory was 135.1 MB in the beginning and 126.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-27 22:38:25,993 INFO L168 Benchmark]: Boogie Preprocessor took 34.33 ms. Allocated memory is still 160.4 MB. Free memory was 126.3 MB in the beginning and 124.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 22:38:25,994 INFO L168 Benchmark]: RCFGBuilder took 425.77 ms. Allocated memory is still 160.4 MB. Free memory was 124.9 MB in the beginning and 112.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 22:38:25,995 INFO L168 Benchmark]: TraceAbstraction took 8985.51 ms. Allocated memory was 160.4 MB in the beginning and 282.1 MB in the end (delta: 121.6 MB). Free memory was 112.4 MB in the beginning and 213.8 MB in the end (delta: -101.4 MB). Peak memory consumption was 21.2 MB. Max. memory is 8.0 GB. [2020-10-27 22:38:25,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.60 ms. Allocated memory is still 160.4 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 250.73 ms. Allocated memory is still 160.4 MB. Free memory was 135.1 MB in the beginning and 126.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.33 ms. Allocated memory is still 160.4 MB. Free memory was 126.3 MB in the beginning and 124.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.77 ms. Allocated memory is still 160.4 MB. Free memory was 124.9 MB in the beginning and 112.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8985.51 ms. Allocated memory was 160.4 MB in the beginning and 282.1 MB in the end (delta: 121.6 MB). Free memory was 112.4 MB in the beginning and 213.8 MB in the end (delta: -101.4 MB). Peak memory consumption was 21.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 5; [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 5 [L15] CALL reach_error() [L4] __assert_fail("0", "id_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 66 SDslu, 178 SDs, 0 SdLazy, 326 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 11306 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 50/100 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...