/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:04:39,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:04:39,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:04:39,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:04:39,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:04:39,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:04:39,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:04:39,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:04:39,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:04:39,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:04:39,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:04:39,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:04:39,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:04:39,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:04:39,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:04:39,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:04:39,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:04:39,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:04:39,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:04:39,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:04:39,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:04:39,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:04:39,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:04:39,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:04:39,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:04:39,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:04:39,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:04:39,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:04:39,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:04:39,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:04:39,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:04:39,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:04:39,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:04:39,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:04:39,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:04:39,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:04:39,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:04:39,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:04:39,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:04:39,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:04:39,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:04:39,128 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 17:04:39,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:04:39,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:04:39,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:04:39,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:04:39,156 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:04:39,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:04:39,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:04:39,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:04:39,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:04:39,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:04:39,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:04:39,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:04:39,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:04:39,158 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:04:39,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:04:39,159 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:04:39,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:04:39,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:04:39,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:04:39,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:04:39,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:04:39,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:04:39,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:04:39,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:04:39,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:04:39,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:04:39,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:04:39,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:04:39,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:04:39,162 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;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;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;log-additional-information=true; [2020-09-24 17:04:39,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:04:39,628 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:04:39,632 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:04:39,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:04:39,635 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:04:39,636 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-09-24 17:04:39,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab2946630/2b911e55653b4b95a0f9a6820e4a1ab3/FLAG1dcfde577 [2020-09-24 17:04:40,205 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:04:40,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-09-24 17:04:40,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab2946630/2b911e55653b4b95a0f9a6820e4a1ab3/FLAG1dcfde577 [2020-09-24 17:04:40,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab2946630/2b911e55653b4b95a0f9a6820e4a1ab3 [2020-09-24 17:04:40,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:04:40,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:04:40,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:04:40,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:04:40,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:04:40,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c32a75b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40, skipping insertion in model container [2020-09-24 17:04:40,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:04:40,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:04:40,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:04:40,832 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:04:40,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:04:40,870 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:04:40,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40 WrapperNode [2020-09-24 17:04:40,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:04:40,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:04:40,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:04:40,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:04:40,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (1/1) ... [2020-09-24 17:04:40,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:04:40,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:04:40,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:04:40,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:04:40,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (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 17:04:41,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:04:41,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:04:41,079 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-24 17:04:41,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:04:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:04:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:04:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-24 17:04:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:04:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:04:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:04:41,292 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:04:41,292 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:04:41,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:04:41 BoogieIcfgContainer [2020-09-24 17:04:41,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:04:41,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:04:41,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:04:41,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:04:41,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:04:40" (1/3) ... [2020-09-24 17:04:41,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25458c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:04:41, skipping insertion in model container [2020-09-24 17:04:41,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:40" (2/3) ... [2020-09-24 17:04:41,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25458c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:04:41, skipping insertion in model container [2020-09-24 17:04:41,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:04:41" (3/3) ... [2020-09-24 17:04:41,305 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-09-24 17:04:41,317 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:04:41,326 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:04:41,348 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:04:41,379 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:04:41,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:04:41,379 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:04:41,380 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:04:41,380 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:04:41,380 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:04:41,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:04:41,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:04:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-24 17:04:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 17:04:41,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:41,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:41,411 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times [2020-09-24 17:04:41,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:41,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934807137] [2020-09-24 17:04:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:41,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:41,608 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:41,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 17:04:41,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:41,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 17:04:41,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:41,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:41,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:04:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:04:41,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:41,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:41,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:41,693 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:41,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:41,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:41,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:04:41,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:41,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:41,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 17:04:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:41,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:41,730 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:41,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:41,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:41,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 17:04:41,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:04:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:41,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:04:41,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:41,764 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 17:04:41,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934807137] [2020-09-24 17:04:41,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:04:41,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:04:41,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948017386] [2020-09-24 17:04:41,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:04:41,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:04:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:04:41,804 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-24 17:04:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:41,925 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-09-24 17:04:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:04:41,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-24 17:04:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:41,941 INFO L225 Difference]: With dead ends: 44 [2020-09-24 17:04:41,941 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 17:04:41,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:04:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 17:04:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 17:04:41,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:04:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-24 17:04:41,997 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-09-24 17:04:41,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:41,998 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-24 17:04:41,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:04:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-24 17:04:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 17:04:42,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:42,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:42,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:04:42,002 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times [2020-09-24 17:04:42,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:42,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995207648] [2020-09-24 17:04:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:42,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,519 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:42,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 17:04:42,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:04:42,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-09-24 17:04:42,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:42,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 17:04:42,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:04:42,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:42,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:42,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,547 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:42,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:42,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:42,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:04:42,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:42,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:42,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:42,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:42,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:42,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 17:04:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:42,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,775 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:42,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 17:04:42,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:04:42,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-09-24 17:04:42,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:42,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:42,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:04:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:04:42,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:42,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 17:04:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:42,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,866 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:42,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:42,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:42,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 17:04:42,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:42,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:04:42,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:04:42,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 17:04:42,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995207648] [2020-09-24 17:04:42,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:04:42,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 17:04:42,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746690714] [2020-09-24 17:04:42,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:04:42,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:04:42,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:04:42,931 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-09-24 17:04:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:43,012 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-09-24 17:04:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:04:43,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-24 17:04:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:43,015 INFO L225 Difference]: With dead ends: 49 [2020-09-24 17:04:43,016 INFO L226 Difference]: Without dead ends: 35 [2020-09-24 17:04:43,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:04:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-24 17:04:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-24 17:04:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 17:04:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-24 17:04:43,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-09-24 17:04:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:43,033 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-24 17:04:43,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:04:43,033 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-24 17:04:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 17:04:43,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:43,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:43,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:04:43,038 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times [2020-09-24 17:04:43,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:43,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576522494] [2020-09-24 17:04:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:43,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:43,260 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:43,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 17:04:43,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:43,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-09-24 17:04:43,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:04:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 17:04:43,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:04:43,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:43,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:43,302 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:43,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:43,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:43,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:04:43,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:43,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:43,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 17:04:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:43,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:43,396 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:43,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 17:04:43,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:43,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 17:04:43,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 17:04:43,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:43,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 17:04:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:43,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:43,461 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:43,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:43,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:43,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 17:04:43,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:04:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:04:43,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 17:04:43,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576522494] [2020-09-24 17:04:43,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:04:43,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:04:43,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112173297] [2020-09-24 17:04:43,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:04:43,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:43,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:04:43,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:04:43,484 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-09-24 17:04:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:43,577 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-24 17:04:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:04:43,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-24 17:04:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:43,579 INFO L225 Difference]: With dead ends: 41 [2020-09-24 17:04:43,579 INFO L226 Difference]: Without dead ends: 35 [2020-09-24 17:04:43,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:04:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-24 17:04:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-24 17:04:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-24 17:04:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-24 17:04:43,587 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-09-24 17:04:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:43,588 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-24 17:04:43,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:04:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-24 17:04:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 17:04:43,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:43,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:43,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:04:43,590 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash 170302224, now seen corresponding path program 1 times [2020-09-24 17:04:43,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:43,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386311270] [2020-09-24 17:04:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:43,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:44,085 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:44,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 17:04:44,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:04:44,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-09-24 17:04:44,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:04:44,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 17:04:44,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:04:44,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:44,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:44,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:44,114 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:44,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:44,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:44,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:04:44,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:44,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:44,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:44,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:44,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:44,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 17:04:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:44,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:44,264 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:44,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 17:04:44,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:44,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-24 17:04:44,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:44,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:04:44,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:04:44,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:04:44,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:44,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 17:04:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:44,355 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:44,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 17:04:44,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:44,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 17:04:44,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:44,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:44,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:44,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 17:04:44,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:44,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 17:04:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:44,409 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:44,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:44,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:44,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:04:44,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:04:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:04:44,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 17:04:44,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386311270] [2020-09-24 17:04:44,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:04:44,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:04:44,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546754588] [2020-09-24 17:04:44,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:04:44,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:44,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:04:44,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:04:44,431 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 8 states. [2020-09-24 17:04:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:44,501 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-09-24 17:04:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:04:44,501 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-09-24 17:04:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:44,503 INFO L225 Difference]: With dead ends: 56 [2020-09-24 17:04:44,503 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 17:04:44,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:04:44,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 17:04:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-09-24 17:04:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-24 17:04:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-24 17:04:44,511 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 38 [2020-09-24 17:04:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:44,512 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-24 17:04:44,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:04:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-24 17:04:44,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 17:04:44,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:44,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:44,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:04:44,514 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:44,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:44,515 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times [2020-09-24 17:04:44,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:44,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463208779] [2020-09-24 17:04:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 17:04:44,530 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 17:04:44,530 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 17:04:44,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:04:44,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:04:44 BoogieIcfgContainer [2020-09-24 17:04:44,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:04:44,563 INFO L168 Benchmark]: Toolchain (without parser) took 4008.26 ms. Allocated memory was 147.3 MB in the beginning and 243.8 MB in the end (delta: 96.5 MB). Free memory was 102.8 MB in the beginning and 168.3 MB in the end (delta: -65.5 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. [2020-09-24 17:04:44,564 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 17:04:44,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.29 ms. Allocated memory is still 147.3 MB. Free memory was 102.1 MB in the beginning and 92.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-24 17:04:44,565 INFO L168 Benchmark]: Boogie Preprocessor took 30.60 ms. Allocated memory is still 147.3 MB. Free memory was 92.5 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-24 17:04:44,567 INFO L168 Benchmark]: RCFGBuilder took 394.19 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 91.2 MB in the beginning and 170.9 MB in the end (delta: -79.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-24 17:04:44,567 INFO L168 Benchmark]: TraceAbstraction took 3261.61 ms. Allocated memory was 203.9 MB in the beginning and 243.8 MB in the end (delta: 39.8 MB). Free memory was 170.3 MB in the beginning and 168.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. [2020-09-24 17:04:44,571 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.29 ms. Allocated memory is still 147.3 MB. Free memory was 102.1 MB in the beginning and 92.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.60 ms. Allocated memory is still 147.3 MB. Free memory was 92.5 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.19 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 91.2 MB in the beginning and 170.9 MB in the end (delta: -79.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3261.61 ms. Allocated memory was 203.9 MB in the beginning and 243.8 MB in the end (delta: 39.8 MB). Free memory was 170.3 MB in the beginning and 168.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id((unsigned int)x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id((unsigned int)x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id((unsigned int)x-1) [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; [L6] RET, EXPR id((unsigned int)x-1) [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 2 [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 105 SDtfs, 19 SDslu, 451 SDs, 0 SdLazy, 128 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=4, 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, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 5740 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 17/25 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...