/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 CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:46:53,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:46:53,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:46:53,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:46:53,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:46:53,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:46:53,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:46:53,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:46:53,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:46:53,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:46:53,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:46:53,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:46:53,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:46:53,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:46:53,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:46:53,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:46:53,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:46:53,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:46:53,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:46:53,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:46:53,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:46:53,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:46:53,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:46:53,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:46:53,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:46:53,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:46:53,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:46:53,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:46:53,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 21:46:53,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:46:53,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:46:53,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:46:53,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:46:53,462 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:46:53,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:46:53,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:46:53,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:46:53,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:46:53,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:46:53,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:46:53,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:46:53,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:46:53,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:46:53,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:46:53,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:46:53,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:46:53,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:46:53,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:46:53,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:46:53,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:46:53,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:46:53,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:46:53,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:46:53,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:46:53,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:46:53,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:46:53,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:46:53,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:46:53,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:46:53,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:46:53,742 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:46:53,745 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:46:53,747 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:46:53,748 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:46:53,748 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-19 21:46:53,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aad8d41c/e2a09ecdf3d04e4a953e751989b45cb6/FLAGca2a67307 [2020-07-19 21:46:54,251 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:46:54,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-19 21:46:54,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aad8d41c/e2a09ecdf3d04e4a953e751989b45cb6/FLAGca2a67307 [2020-07-19 21:46:54,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aad8d41c/e2a09ecdf3d04e4a953e751989b45cb6 [2020-07-19 21:46:54,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:46:54,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:46:54,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:46:54,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:46:54,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:46:54,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb4131c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54, skipping insertion in model container [2020-07-19 21:46:54,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:46:54,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:46:54,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:46:54,855 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:46:54,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:46:54,886 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:46:54,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54 WrapperNode [2020-07-19 21:46:54,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:46:54,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:46:54,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:46:54,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:46:54,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (1/1) ... [2020-07-19 21:46:54,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:46:54,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:46:54,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:46:54,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:46:54,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-19 21:46:55,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:46:55,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:46:55,062 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:46:55,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:46:55,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:46:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:46:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:46:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:46:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:46:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:46:55,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:46:55,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:46:55,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:46:55,290 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:46:55,290 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 21:46:55,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:55 BoogieIcfgContainer [2020-07-19 21:46:55,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:46:55,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:46:55,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:46:55,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:46:55,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:46:54" (1/3) ... [2020-07-19 21:46:55,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b23dc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:55, skipping insertion in model container [2020-07-19 21:46:55,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:54" (2/3) ... [2020-07-19 21:46:55,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b23dc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:55, skipping insertion in model container [2020-07-19 21:46:55,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:55" (3/3) ... [2020-07-19 21:46:55,303 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-07-19 21:46:55,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:46:55,322 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:46:55,340 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:46:55,368 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:46:55,369 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:46:55,369 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:46:55,369 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:46:55,369 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:46:55,369 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:46:55,369 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:46:55,370 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:46:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-19 21:46:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:46:55,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:55,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:55,416 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:55,422 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-07-19 21:46:55,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:55,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281857381] [2020-07-19 21:46:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:55,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281857381] [2020-07-19 21:46:55,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:55,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-19 21:46:55,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361859598] [2020-07-19 21:46:55,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-19 21:46:55,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-19 21:46:55,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:46:55,601 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-19 21:46:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:55,629 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-07-19 21:46:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-19 21:46:55,631 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-19 21:46:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:55,640 INFO L225 Difference]: With dead ends: 61 [2020-07-19 21:46:55,641 INFO L226 Difference]: Without dead ends: 29 [2020-07-19 21:46:55,645 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 [2020-07-19 21:46:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-19 21:46:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-19 21:46:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 21:46:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-07-19 21:46:55,690 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-07-19 21:46:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:55,691 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-07-19 21:46:55,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-19 21:46:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-07-19 21:46:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-19 21:46:55,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:55,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:55,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:46:55,693 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-07-19 21:46:55,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:55,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051977376] [2020-07-19 21:46:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:55,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051977376] [2020-07-19 21:46:55,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:55,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:46:55,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919201988] [2020-07-19 21:46:55,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:46:55,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:55,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:46:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:46:55,800 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-07-19 21:46:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:55,916 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-19 21:46:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:46:55,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-19 21:46:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:55,918 INFO L225 Difference]: With dead ends: 35 [2020-07-19 21:46:55,919 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 21:46:55,920 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 [2020-07-19 21:46:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 21:46:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 21:46:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:46:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-07-19 21:46:55,932 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-07-19 21:46:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:55,933 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-07-19 21:46:55,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:46:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-07-19 21:46:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:46:55,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:55,935 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:55,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:46:55,935 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:55,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-07-19 21:46:55,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:55,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931710180] [2020-07-19 21:46:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:56,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931710180] [2020-07-19 21:46:56,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:56,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 21:46:56,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773896605] [2020-07-19 21:46:56,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:46:56,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:56,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:46:56,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:46:56,041 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-07-19 21:46:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:56,179 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-07-19 21:46:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:46:56,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-19 21:46:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:56,182 INFO L225 Difference]: With dead ends: 48 [2020-07-19 21:46:56,182 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 21:46:56,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 21:46:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-19 21:46:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-19 21:46:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-07-19 21:46:56,195 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-07-19 21:46:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:56,196 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-07-19 21:46:56,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:46:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-07-19 21:46:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:46:56,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:56,198 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:56,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 21:46:56,198 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:56,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:56,199 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-07-19 21:46:56,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:56,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130144634] [2020-07-19 21:46:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:46:56,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130144634] [2020-07-19 21:46:56,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:56,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 21:46:56,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716423572] [2020-07-19 21:46:56,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:46:56,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:56,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:46:56,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:46:56,342 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-07-19 21:46:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:56,467 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-07-19 21:46:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:46:56,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-19 21:46:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:56,470 INFO L225 Difference]: With dead ends: 55 [2020-07-19 21:46:56,470 INFO L226 Difference]: Without dead ends: 53 [2020-07-19 21:46:56,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:46:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-19 21:46:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-19 21:46:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:46:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-07-19 21:46:56,495 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-07-19 21:46:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:56,495 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-07-19 21:46:56,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:46:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-07-19 21:46:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:46:56,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:56,497 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:56,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 21:46:56,498 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:56,498 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-07-19 21:46:56,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:56,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548119956] [2020-07-19 21:46:56,499 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-19 21:46:56,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548119956] [2020-07-19 21:46:56,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:56,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 21:46:56,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976711015] [2020-07-19 21:46:56,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:46:56,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:56,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:46:56,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:46:56,583 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-07-19 21:46:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:56,747 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-19 21:46:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:46:56,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-19 21:46:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:56,749 INFO L225 Difference]: With dead ends: 70 [2020-07-19 21:46:56,749 INFO L226 Difference]: Without dead ends: 63 [2020-07-19 21:46:56,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:46:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-19 21:46:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-19 21:46:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 21:46:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-19 21:46:56,763 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-07-19 21:46:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:56,764 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-19 21:46:56,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:46:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-19 21:46:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-19 21:46:56,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:56,765 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:56,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 21:46:56,766 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-07-19 21:46:56,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:56,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606019476] [2020-07-19 21:46:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-19 21:46:56,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606019476] [2020-07-19 21:46:56,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:56,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 21:46:56,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298362299] [2020-07-19 21:46:56,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:46:56,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:56,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:46:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:56,853 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-07-19 21:46:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:57,012 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-07-19 21:46:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:46:57,013 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-19 21:46:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:57,015 INFO L225 Difference]: With dead ends: 72 [2020-07-19 21:46:57,015 INFO L226 Difference]: Without dead ends: 70 [2020-07-19 21:46:57,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:46:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-19 21:46:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-07-19 21:46:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-19 21:46:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-07-19 21:46:57,027 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-07-19 21:46:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:57,028 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-07-19 21:46:57,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:46:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-07-19 21:46:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-19 21:46:57,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:57,030 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:57,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 21:46:57,031 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:57,031 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-07-19 21:46:57,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:57,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397464151] [2020-07-19 21:46:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 21:46:57,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397464151] [2020-07-19 21:46:57,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983812393] [2020-07-19 21:46:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:46:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:57,462 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:46:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 21:46:57,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:57,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-19 21:46:57,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369353286] [2020-07-19 21:46:57,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:46:57,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:46:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:46:57,514 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 15 states. [2020-07-19 21:46:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:57,983 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-07-19 21:46:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:46:57,984 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-07-19 21:46:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:57,986 INFO L225 Difference]: With dead ends: 110 [2020-07-19 21:46:57,987 INFO L226 Difference]: Without dead ends: 95 [2020-07-19 21:46:57,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:46:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-19 21:46:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-19 21:46:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 21:46:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-07-19 21:46:58,004 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 56 [2020-07-19 21:46:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:58,004 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-07-19 21:46:58,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:46:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-07-19 21:46:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-19 21:46:58,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:58,006 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:58,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:46:58,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-07-19 21:46:58,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:58,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369926039] [2020-07-19 21:46:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 21:46:58,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369926039] [2020-07-19 21:46:58,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258185325] [2020-07-19 21:46:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:46:58,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:58,445 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:58,447 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 21:46:58,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:58,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-19 21:46:58,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675381810] [2020-07-19 21:46:58,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:46:58,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:46:58,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:46:58,473 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 14 states. [2020-07-19 21:46:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:58,671 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-07-19 21:46:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:46:58,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-07-19 21:46:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:58,675 INFO L225 Difference]: With dead ends: 93 [2020-07-19 21:46:58,675 INFO L226 Difference]: Without dead ends: 91 [2020-07-19 21:46:58,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:46:58,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-19 21:46:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-07-19 21:46:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-19 21:46:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-07-19 21:46:58,689 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 58 [2020-07-19 21:46:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:58,690 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-07-19 21:46:58,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:46:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-07-19 21:46:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-19 21:46:58,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:58,692 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:58,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:58,907 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-07-19 21:46:58,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:58,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831933976] [2020-07-19 21:46:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:46:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-19 21:46:59,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831933976] [2020-07-19 21:46:59,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452609280] [2020-07-19 21:46:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:46:59,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:59,284 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:59,285 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-19 21:46:59,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:59,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2020-07-19 21:46:59,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778441271] [2020-07-19 21:46:59,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:46:59,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:46:59,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:46:59,324 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 20 states. [2020-07-19 21:46:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:59,805 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-07-19 21:46:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:46:59,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-07-19 21:46:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:59,808 INFO L225 Difference]: With dead ends: 112 [2020-07-19 21:46:59,808 INFO L226 Difference]: Without dead ends: 110 [2020-07-19 21:46:59,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:46:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-19 21:46:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-07-19 21:46:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-19 21:46:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-07-19 21:46:59,823 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 83 [2020-07-19 21:46:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:59,824 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-07-19 21:46:59,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:46:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-07-19 21:46:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-19 21:46:59,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:59,826 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:00,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:00,040 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash 314554042, now seen corresponding path program 2 times [2020-07-19 21:47:00,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:00,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404241655] [2020-07-19 21:47:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:47:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-07-19 21:47:00,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404241655] [2020-07-19 21:47:00,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281121847] [2020-07-19 21:47:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:47:00,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:00,388 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:47:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-07-19 21:47:00,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:00,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-19 21:47:00,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727450224] [2020-07-19 21:47:00,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:47:00,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:47:00,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:47:00,441 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 17 states. [2020-07-19 21:47:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:00,685 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2020-07-19 21:47:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:47:00,686 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 106 [2020-07-19 21:47:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:00,687 INFO L225 Difference]: With dead ends: 105 [2020-07-19 21:47:00,687 INFO L226 Difference]: Without dead ends: 96 [2020-07-19 21:47:00,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:47:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-19 21:47:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-07-19 21:47:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-19 21:47:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-07-19 21:47:00,698 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 106 [2020-07-19 21:47:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:00,699 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-07-19 21:47:00,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:47:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-07-19 21:47:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-19 21:47:00,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:00,701 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:00,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:00,915 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-07-19 21:47:00,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:00,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921268574] [2020-07-19 21:47:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 [2020-07-19 21:47:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-07-19 21:47:01,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921268574] [2020-07-19 21:47:01,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953043785] [2020-07-19 21:47:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75986eb9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:47:01,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:01,545 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:47:01,546 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:47:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 68 proven. 58 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-07-19 21:47:01,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:01,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2020-07-19 21:47:01,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230047399] [2020-07-19 21:47:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:47:01,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:47:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:47:01,608 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 26 states. [2020-07-19 21:47:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:02,876 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2020-07-19 21:47:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 21:47:02,877 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 108 [2020-07-19 21:47:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:02,877 INFO L225 Difference]: With dead ends: 111 [2020-07-19 21:47:02,878 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:47:02,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 21:47:02,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:47:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:47:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:47:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:47:02,881 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-07-19 21:47:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:02,881 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:47:02,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:47:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:47:02,882 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:47:03,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-19 21:47:03,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:47:03,658 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:47:03,658 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:47:03,658 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:47:03,658 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:47:03,659 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:47:03,659 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:47:03,659 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:47:03,659 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-19 21:47:03,659 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:47:03,659 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:47:03,659 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-19 21:47:03,659 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-07-19 21:47:03,660 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-07-19 21:47:03,660 INFO L264 CegarLoopResult]: At program point L36(lines 26 37) the Hoare annotation is: (let ((.cse0 (= main_~bufferlen~0 (+ main_~buflim~0 2))) (.cse1 (<= (+ main_~bufferlen~0 1) main_~inlen~0))) (or (and (<= main_~in~0 0) (= 0 main_~buf~0) (<= 0 main_~in~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) .cse0 .cse1) (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= main_~buf~0 main_~buflim~0) (<= 1 main_~in~0) .cse0 .cse1 (<= 0 main_~buf~0)))) [2020-07-19 21:47:03,660 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-07-19 21:47:03,660 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-19 21:47:03,660 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-07-19 21:47:03,660 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 2 main_~bufferlen~0) (<= 0 main_~in~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 0 main_~buf~0)) [2020-07-19 21:47:03,661 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 2 main_~bufferlen~0) (<= 0 main_~in~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 0 main_~buf~0)) [2020-07-19 21:47:03,661 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-07-19 21:47:03,661 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-07-19 21:47:03,661 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-07-19 21:47:03,661 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-19 21:47:03,661 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0) (<= 0 main_~buf~0)) [2020-07-19 21:47:03,661 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~buf~0 1) main_~buflim~0)) (.cse1 (= main_~bufferlen~0 (+ main_~buflim~0 2))) (.cse2 (<= (+ main_~bufferlen~0 1) main_~inlen~0))) (or (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) .cse0 (<= 1 main_~in~0) .cse1 .cse2 (<= 0 main_~buf~0)) (and (<= main_~in~0 0) (= 0 main_~buf~0) (<= 0 main_~in~0) .cse0 .cse1 .cse2))) [2020-07-19 21:47:03,662 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-07-19 21:47:03,662 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~buf~0 1) main_~buflim~0)) (.cse1 (= main_~bufferlen~0 (+ main_~buflim~0 2))) (.cse2 (<= (+ main_~bufferlen~0 1) main_~inlen~0))) (or (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) .cse0 (<= 1 main_~in~0) .cse1 .cse2 (<= 0 main_~buf~0)) (and (<= main_~in~0 0) (= 0 main_~buf~0) (<= 0 main_~in~0) .cse0 .cse1 .cse2))) [2020-07-19 21:47:03,662 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-07-19 21:47:03,662 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 37) the Hoare annotation is: (and (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0) (<= 0 main_~buf~0)) [2020-07-19 21:47:03,664 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-19 21:47:03,664 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-19 21:47:03,664 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= main_~buf~0 main_~buflim~0) (<= 1 main_~in~0) (= main_~bufferlen~0 (+ main_~buflim~0 2)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~buf~0)) [2020-07-19 21:47:03,664 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= main_~buf~0 main_~buflim~0) (<= 1 main_~in~0) (= main_~bufferlen~0 (+ main_~buflim~0 2)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~buf~0)) [2020-07-19 21:47:03,664 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-19 21:47:03,665 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-19 21:47:03,665 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-19 21:47:03,665 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-19 21:47:03,665 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-19 21:47:03,665 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-19 21:47:03,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:47:03 BoogieIcfgContainer [2020-07-19 21:47:03,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:47:03,693 INFO L168 Benchmark]: Toolchain (without parser) took 9044.50 ms. Allocated memory was 138.9 MB in the beginning and 304.6 MB in the end (delta: 165.7 MB). Free memory was 104.2 MB in the beginning and 159.3 MB in the end (delta: -55.2 MB). Peak memory consumption was 110.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:03,694 INFO L168 Benchmark]: CDTParser took 1.09 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 21:47:03,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.33 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 94.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:03,696 INFO L168 Benchmark]: Boogie Preprocessor took 108.49 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 94.0 MB in the beginning and 182.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:03,697 INFO L168 Benchmark]: RCFGBuilder took 298.61 ms. Allocated memory is still 203.4 MB. Free memory was 182.7 MB in the beginning and 167.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:03,706 INFO L168 Benchmark]: TraceAbstraction took 8389.68 ms. Allocated memory was 203.4 MB in the beginning and 304.6 MB in the end (delta: 101.2 MB). Free memory was 167.0 MB in the beginning and 159.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 108.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:03,713 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.09 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.33 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 94.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.49 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 94.0 MB in the beginning and 182.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 298.61 ms. Allocated memory is still 203.4 MB. Free memory was 182.7 MB in the beginning and 167.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8389.68 ms. Allocated memory was 203.4 MB in the beginning and 304.6 MB in the end (delta: 101.2 MB). Free memory was 167.0 MB in the beginning and 159.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 108.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((in <= 0 && 0 == buf) && 0 <= in) && buf + 2 <= bufferlen) && bufferlen == buflim + 2) && bufferlen + 1 <= inlen) || (((((in + buflim + 3 <= buf + inlen && buf <= buflim) && 1 <= in) && bufferlen == buflim + 2) && bufferlen + 1 <= inlen) && 0 <= buf) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.7s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 446 SDtfs, 451 SDslu, 1864 SDs, 0 SdLazy, 1534 SolverSat, 540 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 707 GetRequests, 534 SyntacticMatches, 8 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 33 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 64 PreInvPairs, 113 NumberOfFragments, 282 HoareAnnotationTreeSize, 64 FomulaSimplifications, 1711 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 946 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 963 NumberOfCodeBlocks, 963 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 947 ConstructedInterpolants, 0 QuantifiedInterpolants, 253246 SizeOfPredicates, 20 NumberOfNonLiveVariables, 791 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 2738/2972 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...