/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --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/id2_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:44:40,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:44:40,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:44:40,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:44:40,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:44:40,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:44:40,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:44:40,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:44:40,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:44:40,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:44:40,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:44:40,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:44:40,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:44:40,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:44:40,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:44:40,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:44:40,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:44:40,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:44:40,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:44:40,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:44:40,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:44:40,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:44:40,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:44:40,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:44:40,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 19:44:40,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:44:40,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:44:40,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:44:40,998 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 [2020-08-21 19:44:41,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:44:41,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:44:41,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:44:41,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:44:41,023 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:44:41,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:44:41,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:44:41,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:44:41,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:44:41,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:44:41,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:44:41,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:44:41,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:44:41,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:44:41,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:44:41,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:44:41,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:44:41,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:44:41,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:44:41,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:44:41,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:44:41,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:44:41,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:44:41,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:44:41,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:44:41,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:44:41,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:44:41,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:44:41,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:44:41,028 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:44:41,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:44:41,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:44:41,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:44:41,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:44:41,363 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:44:41,363 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-08-21 19:44:41,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fa4e400c/c755c66f6a6f4f839f2f3044f16d5d24/FLAGf52011d9a [2020-08-21 19:44:41,903 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:44:41,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-08-21 19:44:41,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fa4e400c/c755c66f6a6f4f839f2f3044f16d5d24/FLAGf52011d9a [2020-08-21 19:44:42,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fa4e400c/c755c66f6a6f4f839f2f3044f16d5d24 [2020-08-21 19:44:42,335 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:44:42,336 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:44:42,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:44:42,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:44:42,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:44:42,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa3462e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42, skipping insertion in model container [2020-08-21 19:44:42,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:44:42,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:44:42,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:44:42,529 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:44:42,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:44:42,557 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:44:42,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42 WrapperNode [2020-08-21 19:44:42,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:44:42,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:44:42,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:44:42,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:44:42,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (1/1) ... [2020-08-21 19:44:42,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:44:42,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:44:42,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:44:42,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:44:42,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (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 [2020-08-21 19:44:42,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:44:42,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:44:42,742 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 19:44:42,742 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-21 19:44:42,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:44:42,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 19:44:42,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:44:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 19:44:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-21 19:44:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:44:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:44:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:44:42,961 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:44:42,962 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 19:44:42,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:44:42 BoogieIcfgContainer [2020-08-21 19:44:42,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:44:42,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:44:42,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:44:42,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:44:42,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:44:42" (1/3) ... [2020-08-21 19:44:42,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4769ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:44:42, skipping insertion in model container [2020-08-21 19:44:42,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:42" (2/3) ... [2020-08-21 19:44:42,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4769ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:44:42, skipping insertion in model container [2020-08-21 19:44:42,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:44:42" (3/3) ... [2020-08-21 19:44:42,976 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2020-08-21 19:44:42,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:44:42,996 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:44:43,019 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:44:43,052 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:44:43,052 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:44:43,052 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:44:43,052 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:44:43,052 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:44:43,053 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:44:43,053 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:44:43,053 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:44:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 19:44:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 19:44:43,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:43,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:43,094 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:43,103 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-21 19:44:43,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:43,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391317481] [2020-08-21 19:44:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:44:43,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391317481] [2020-08-21 19:44:43,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:43,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:44:43,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469722044] [2020-08-21 19:44:43,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:44:43,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:43,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:44:43,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:43,450 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-21 19:44:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:43,511 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-21 19:44:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:44:43,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 19:44:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:43,525 INFO L225 Difference]: With dead ends: 40 [2020-08-21 19:44:43,526 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 19:44:43,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 19:44:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 19:44:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 19:44:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 19:44:43,580 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-21 19:44:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:43,580 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 19:44:43,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:44:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 19:44:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:44:43,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:43,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:43,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:44:43,584 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:43,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-21 19:44:43,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:43,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988849706] [2020-08-21 19:44:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:44:43,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988849706] [2020-08-21 19:44:43,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:43,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:44:43,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958680674] [2020-08-21 19:44:43,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:44:43,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:44:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:43,747 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-21 19:44:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:43,765 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 19:44:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:44:43,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 19:44:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:43,768 INFO L225 Difference]: With dead ends: 32 [2020-08-21 19:44:43,768 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 19:44:43,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:43,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 19:44:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 19:44:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 19:44:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 19:44:43,777 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-21 19:44:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:43,778 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 19:44:43,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:44:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 19:44:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:44:43,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:43,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:43,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:44:43,780 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:43,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-21 19:44:43,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:43,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422468578] [2020-08-21 19:44:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:43,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:44:44,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422468578] [2020-08-21 19:44:44,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:44,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:44:44,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542558298] [2020-08-21 19:44:44,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:44:44,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:44,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:44:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:44:44,031 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-21 19:44:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:44,097 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 19:44:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 19:44:44,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 19:44:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:44,099 INFO L225 Difference]: With dead ends: 48 [2020-08-21 19:44:44,099 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 19:44:44,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:44:44,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 19:44:44,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 19:44:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 19:44:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-21 19:44:44,109 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-21 19:44:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:44,110 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-21 19:44:44,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:44:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-21 19:44:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:44:44,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:44,112 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] [2020-08-21 19:44:44,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:44:44,112 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:44,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-21 19:44:44,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:44,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986164455] [2020-08-21 19:44:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 19:44:44,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986164455] [2020-08-21 19:44:44,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:44,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:44:44,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880677640] [2020-08-21 19:44:44,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:44:44,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:44,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:44:44,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:44,238 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-21 19:44:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:44,286 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 19:44:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:44:44,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 19:44:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:44,290 INFO L225 Difference]: With dead ends: 50 [2020-08-21 19:44:44,291 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 19:44:44,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 19:44:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-21 19:44:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 19:44:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-21 19:44:44,308 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-21 19:44:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:44,308 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-21 19:44:44,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:44:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-21 19:44:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:44:44,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:44,314 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] [2020-08-21 19:44:44,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:44:44,314 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:44,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-21 19:44:44,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:44,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249044353] [2020-08-21 19:44:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 19:44:44,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249044353] [2020-08-21 19:44:44,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:44,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:44:44,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396959679] [2020-08-21 19:44:44,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:44:44,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:44,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:44:44,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:44:44,556 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-21 19:44:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:44,661 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-08-21 19:44:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:44:44,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-21 19:44:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:44,663 INFO L225 Difference]: With dead ends: 66 [2020-08-21 19:44:44,663 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 19:44:44,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:44:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 19:44:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2020-08-21 19:44:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 19:44:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-21 19:44:44,672 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-21 19:44:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:44,672 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-21 19:44:44,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:44:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-21 19:44:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 19:44:44,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:44,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:44,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:44:44,675 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-21 19:44:44,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:44,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857881620] [2020-08-21 19:44:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 19:44:44,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857881620] [2020-08-21 19:44:44,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:44,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:44:44,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554453955] [2020-08-21 19:44:44,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:44:44,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:44,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:44:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:44:44,880 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-08-21 19:44:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:44,983 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-08-21 19:44:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:44:44,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-21 19:44:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:44,985 INFO L225 Difference]: With dead ends: 70 [2020-08-21 19:44:44,985 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 19:44:44,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:44:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 19:44:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-21 19:44:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 19:44:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-21 19:44:44,994 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2020-08-21 19:44:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:44,995 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-21 19:44:44,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:44:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-21 19:44:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 19:44:44,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:44,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:44,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:44:44,997 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-21 19:44:44,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:44,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096103053] [2020-08-21 19:44:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-21 19:44:45,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096103053] [2020-08-21 19:44:45,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:45,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:44:45,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455924022] [2020-08-21 19:44:45,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:44:45,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:44:45,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:44:45,341 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 11 states. [2020-08-21 19:44:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:45,451 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-08-21 19:44:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:44:45,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-08-21 19:44:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:45,453 INFO L225 Difference]: With dead ends: 58 [2020-08-21 19:44:45,453 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 19:44:45,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:44:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 19:44:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 19:44:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 19:44:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 19:44:45,457 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-08-21 19:44:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:45,458 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 19:44:45,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:44:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 19:44:45,458 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 19:44:45,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:44:45,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 19:44:45,490 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 19:44:45,491 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:44:45,491 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 19:44:45,491 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-21 19:44:45,491 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-21 19:44:45,491 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-21 19:44:45,492 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-21 19:44:45,492 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-21 19:44:45,492 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-21 19:44:45,492 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:44:45,492 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 19:44:45,492 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 19:44:45,492 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 19:44:45,493 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-21 19:44:45,493 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-21 19:44:45,493 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-21 19:44:45,493 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-21 19:44:45,493 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-21 19:44:45,493 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-21 19:44:45,494 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 19:44:45,494 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-21 19:44:45,494 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-21 19:44:45,494 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-21 19:44:45,495 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-21 19:44:45,495 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-21 19:44:45,496 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 19:44:45,496 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-21 19:44:45,496 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-21 19:44:45,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:44:45 BoogieIcfgContainer [2020-08-21 19:44:45,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:44:45,511 INFO L168 Benchmark]: Toolchain (without parser) took 3173.33 ms. Allocated memory was 140.5 MB in the beginning and 243.8 MB in the end (delta: 103.3 MB). Free memory was 102.1 MB in the beginning and 199.9 MB in the end (delta: -97.8 MB). Peak memory consumption was 5.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,517 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:44:45,518 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.08 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,519 INFO L168 Benchmark]: Boogie Preprocessor took 115.56 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 181.2 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,520 INFO L168 Benchmark]: RCFGBuilder took 291.72 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 169.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,521 INFO L168 Benchmark]: TraceAbstraction took 2539.73 ms. Allocated memory was 202.9 MB in the beginning and 243.8 MB in the end (delta: 40.9 MB). Free memory was 168.5 MB in the beginning and 199.9 MB in the end (delta: -31.4 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,534 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.08 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.56 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 181.2 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.72 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 169.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2539.73 ms. Allocated memory was 202.9 MB in the beginning and 243.8 MB in the end (delta: 40.9 MB). Free memory was 168.5 MB in the beginning and 199.9 MB in the end (delta: -31.4 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 22 SDslu, 1143 SDs, 0 SdLazy, 250 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 14817 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 31/41 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 correct! Received shutdown request...