/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:35:45,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:35:45,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:35:45,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:35:45,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:35:45,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:35:45,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:35:45,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:35:45,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:35:45,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:35:45,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:35:45,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:35:45,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:35:45,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:35:45,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:35:45,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:35:45,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:35:45,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:35:45,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:35:45,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:35:45,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:35:45,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:35:45,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:35:45,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:35:45,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:35:45,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:35:45,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:35:45,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:35:45,908 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 [2020-08-18 15:35:45,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:35:45,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:35:45,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:35:45,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:35:45,955 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:35:45,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:35:45,957 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:35:45,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:35:45,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:35:45,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:35:45,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:35:45,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:35:45,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:35:45,958 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:35:45,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:35:45,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:35:45,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:35:45,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:35:45,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:35:45,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:35:45,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:35:45,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:35:45,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:35:45,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:35:45,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:35:45,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:35:45,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:35:45,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:35:45,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:35:45,967 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 -> false [2020-08-18 15:35:46,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:35:46,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:35:46,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:35:46,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:35:46,293 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:35:46,294 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-18 15:35:46,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3c1bc23f/a97fe3da0719441b92c7647c9100909d/FLAG769256e13 [2020-08-18 15:35:46,818 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:35:46,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-18 15:35:46,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3c1bc23f/a97fe3da0719441b92c7647c9100909d/FLAG769256e13 [2020-08-18 15:35:47,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3c1bc23f/a97fe3da0719441b92c7647c9100909d [2020-08-18 15:35:47,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:35:47,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:35:47,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:35:47,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:35:47,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:35:47,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77418076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47, skipping insertion in model container [2020-08-18 15:35:47,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:35:47,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:35:47,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:35:47,369 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:35:47,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:35:47,396 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:35:47,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47 WrapperNode [2020-08-18 15:35:47,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:35:47,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:35:47,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:35:47,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:35:47,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (1/1) ... [2020-08-18 15:35:47,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:35:47,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:35:47,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:35:47,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:35:47,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (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 [2020-08-18 15:35:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:35:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:35:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 15:35:47,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:35:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:35:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 15:35:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 15:35:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:35:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:35:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:35:47,772 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:35:47,772 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 15:35:47,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:35:47 BoogieIcfgContainer [2020-08-18 15:35:47,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:35:47,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:35:47,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:35:47,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:35:47,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:35:47" (1/3) ... [2020-08-18 15:35:47,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69477fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:35:47, skipping insertion in model container [2020-08-18 15:35:47,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:47" (2/3) ... [2020-08-18 15:35:47,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69477fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:35:47, skipping insertion in model container [2020-08-18 15:35:47,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:35:47" (3/3) ... [2020-08-18 15:35:47,785 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-18 15:35:47,796 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:35:47,803 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:35:47,826 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:35:47,862 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:35:47,862 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:35:47,862 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:35:47,862 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:35:47,863 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:35:47,863 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:35:47,863 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:35:47,863 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:35:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 15:35:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 15:35:47,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:47,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:47,895 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-18 15:35:47,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:47,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043742861] [2020-08-18 15:35:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043742861] [2020-08-18 15:35:48,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:48,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 15:35:48,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018080113] [2020-08-18 15:35:48,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 15:35:48,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 15:35:48,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 15:35:48,082 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-18 15:35:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,103 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-18 15:35:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 15:35:48,104 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 15:35:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,112 INFO L225 Difference]: With dead ends: 31 [2020-08-18 15:35:48,112 INFO L226 Difference]: Without dead ends: 14 [2020-08-18 15:35:48,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 15:35:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-18 15:35:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-18 15:35:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-18 15:35:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-18 15:35:48,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-18 15:35:48,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,152 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-18 15:35:48,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 15:35:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-18 15:35:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 15:35:48,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:35:48,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,155 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-18 15:35:48,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108861619] [2020-08-18 15:35:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108861619] [2020-08-18 15:35:48,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:48,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:35:48,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101344567] [2020-08-18 15:35:48,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:35:48,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:35:48,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:35:48,256 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-18 15:35:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,310 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-18 15:35:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:35:48,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 15:35:48,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,312 INFO L225 Difference]: With dead ends: 23 [2020-08-18 15:35:48,312 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 15:35:48,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:35:48,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 15:35:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 15:35:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 15:35:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-18 15:35:48,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-18 15:35:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,321 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-18 15:35:48,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:35:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-18 15:35:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 15:35:48,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:35:48,323 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-18 15:35:48,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070938348] [2020-08-18 15:35:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070938348] [2020-08-18 15:35:48,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:48,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:35:48,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675330133] [2020-08-18 15:35:48,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:35:48,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:35:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:35:48,665 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-18 15:35:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,800 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 15:35:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:35:48,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-18 15:35:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,803 INFO L225 Difference]: With dead ends: 33 [2020-08-18 15:35:48,804 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 15:35:48,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:35:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 15:35:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-18 15:35:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 15:35:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-18 15:35:48,815 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-18 15:35:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,816 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-18 15:35:48,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:35:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-18 15:35:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:35:48,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:35:48,818 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-18 15:35:48,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417894885] [2020-08-18 15:35:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 15:35:48,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417894885] [2020-08-18 15:35:48,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:48,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:35:48,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645680758] [2020-08-18 15:35:48,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:35:48,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:35:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:35:48,850 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-18 15:35:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,869 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 15:35:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:35:48,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 15:35:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,871 INFO L225 Difference]: With dead ends: 32 [2020-08-18 15:35:48,871 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 15:35:48,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:35:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 15:35:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 15:35:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 15:35:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-18 15:35:48,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-18 15:35:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,878 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-18 15:35:48,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:35:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-18 15:35:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:35:48,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:35:48,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-18 15:35:48,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796484425] [2020-08-18 15:35:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796484425] [2020-08-18 15:35:48,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:48,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 15:35:48,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380256834] [2020-08-18 15:35:48,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:35:48,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:35:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:35:48,936 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-18 15:35:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,995 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 15:35:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:35:48,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 15:35:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,996 INFO L225 Difference]: With dead ends: 30 [2020-08-18 15:35:48,997 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 15:35:48,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:35:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 15:35:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-18 15:35:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 15:35:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 15:35:49,003 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-18 15:35:49,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:49,003 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 15:35:49,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:35:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 15:35:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:35:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:49,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:49,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:35:49,005 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-18 15:35:49,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:49,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216275752] [2020-08-18 15:35:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:49,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 15:35:49,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216275752] [2020-08-18 15:35:49,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:49,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:35:49,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139811749] [2020-08-18 15:35:49,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:35:49,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:49,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:35:49,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:35:49,227 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-18 15:35:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:49,391 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-18 15:35:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:35:49,392 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-18 15:35:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:49,393 INFO L225 Difference]: With dead ends: 31 [2020-08-18 15:35:49,393 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 15:35:49,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-18 15:35:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 15:35:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-18 15:35:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 15:35:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 15:35:49,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-18 15:35:49,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:49,400 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 15:35:49,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:35:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 15:35:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:35:49,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:49,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:49,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:35:49,402 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-18 15:35:49,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:49,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132578909] [2020-08-18 15:35:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:49,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:49,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132578909] [2020-08-18 15:35:49,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:49,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:35:49,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587710679] [2020-08-18 15:35:49,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:35:49,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:49,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:35:49,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:35:49,483 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-18 15:35:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:49,530 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-18 15:35:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:35:49,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-18 15:35:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:49,531 INFO L225 Difference]: With dead ends: 38 [2020-08-18 15:35:49,532 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 15:35:49,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:35:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 15:35:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-18 15:35:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 15:35:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-18 15:35:49,543 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-18 15:35:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:49,543 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-18 15:35:49,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:35:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-18 15:35:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 15:35:49,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:49,545 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:49,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:35:49,546 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:49,546 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-18 15:35:49,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:49,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373755971] [2020-08-18 15:35:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:49,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:49,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373755971] [2020-08-18 15:35:49,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:49,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:35:49,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743542759] [2020-08-18 15:35:49,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:35:49,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:35:49,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:35:49,636 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-18 15:35:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:49,701 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-18 15:35:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:35:49,701 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-18 15:35:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:49,702 INFO L225 Difference]: With dead ends: 42 [2020-08-18 15:35:49,702 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 15:35:49,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:35:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 15:35:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-18 15:35:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 15:35:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-18 15:35:49,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-18 15:35:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:49,710 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-18 15:35:49,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:35:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-18 15:35:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 15:35:49,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:49,711 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:49,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:35:49,711 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:49,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-18 15:35:49,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:49,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418721727] [2020-08-18 15:35:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:49,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:49,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418721727] [2020-08-18 15:35:49,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:49,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:35:49,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105588665] [2020-08-18 15:35:49,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:35:49,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:49,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:35:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:35:49,884 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-18 15:35:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:49,967 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-18 15:35:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:35:49,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-18 15:35:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:49,970 INFO L225 Difference]: With dead ends: 46 [2020-08-18 15:35:49,970 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 15:35:49,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:35:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 15:35:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-18 15:35:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 15:35:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-18 15:35:49,978 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-18 15:35:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:49,979 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-18 15:35:49,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:35:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-18 15:35:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 15:35:49,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:49,980 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:49,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:35:49,981 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-18 15:35:49,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:49,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770464406] [2020-08-18 15:35:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 15:35:50,002 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 15:35:50,003 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 15:35:50,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:35:50,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:35:50 BoogieIcfgContainer [2020-08-18 15:35:50,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:35:50,027 INFO L168 Benchmark]: Toolchain (without parser) took 2857.23 ms. Allocated memory was 149.4 MB in the beginning and 233.3 MB in the end (delta: 83.9 MB). Free memory was 104.5 MB in the beginning and 93.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 94.8 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:50,028 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 149.4 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 15:35:50,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.22 ms. Allocated memory is still 149.4 MB. Free memory was 104.3 MB in the beginning and 94.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:50,030 INFO L168 Benchmark]: Boogie Preprocessor took 124.71 ms. Allocated memory was 149.4 MB in the beginning and 206.6 MB in the end (delta: 57.1 MB). Free memory was 94.9 MB in the beginning and 185.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:50,031 INFO L168 Benchmark]: RCFGBuilder took 254.18 ms. Allocated memory is still 206.6 MB. Free memory was 184.6 MB in the beginning and 172.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:50,031 INFO L168 Benchmark]: TraceAbstraction took 2247.18 ms. Allocated memory was 206.6 MB in the beginning and 233.3 MB in the end (delta: 26.7 MB). Free memory was 172.7 MB in the beginning and 93.6 MB in the end (delta: 79.1 MB). Peak memory consumption was 105.8 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:50,035 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 149.4 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.22 ms. Allocated memory is still 149.4 MB. Free memory was 104.3 MB in the beginning and 94.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.71 ms. Allocated memory was 149.4 MB in the beginning and 206.6 MB in the end (delta: 57.1 MB). Free memory was 94.9 MB in the beginning and 185.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.18 ms. Allocated memory is still 206.6 MB. Free memory was 184.6 MB in the beginning and 172.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2247.18 ms. Allocated memory was 206.6 MB in the beginning and 233.3 MB in the end (delta: 26.7 MB). Free memory was 172.7 MB in the beginning and 93.6 MB in the end (delta: 79.1 MB). Peak memory consumption was 105.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i