/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.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:52:30,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:52:30,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:52:30,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 01:52:30,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:52:30,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:52:30,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:52:30,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:52:30,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:52:30,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:52:30,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:52:30,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:52:30,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:52:30,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:52:30,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:52:30,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:52:30,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:52:30,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:52:30,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:52:30,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:52:30,400 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 [2020-07-20 01:52:30,417 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:52:30,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:52:30,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:52:30,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:52:30,419 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:52:30,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:52:30,420 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:52:30,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:52:30,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:52:30,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:52:30,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:52:30,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:52:30,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:52:30,421 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:52:30,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:52:30,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:52:30,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:52:30,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:52:30,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:52:30,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:52:30,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:52:30,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:52:30,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:52:30,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:52:30,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:52:30,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:52:30,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:52:30,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:52:30,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:52:30,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:52:30,810 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:52:30,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:52:30,827 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:52:30,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:52:30,829 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:52:30,830 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-07-20 01:52:30,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f4d6c6f/a1d57be1a5b448c3a10540ce2b13d308/FLAGf65cee479 [2020-07-20 01:52:31,317 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:52:31,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i [2020-07-20 01:52:31,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f4d6c6f/a1d57be1a5b448c3a10540ce2b13d308/FLAGf65cee479 [2020-07-20 01:52:31,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f4d6c6f/a1d57be1a5b448c3a10540ce2b13d308 [2020-07-20 01:52:31,711 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:52:31,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:52:31,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:52:31,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:52:31,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:52:31,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:31,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79052151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31, skipping insertion in model container [2020-07-20 01:52:31,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:31,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:52:31,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:52:31,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:52:31,922 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:52:31,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:52:31,953 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:52:31,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31 WrapperNode [2020-07-20 01:52:31,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:52:31,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:52:31,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:52:31,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:52:31,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:31,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:31,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:31,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:31,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:31,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:31,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (1/1) ... [2020-07-20 01:52:32,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:52:32,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:52:32,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:52:32,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:52:32,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (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 [2020-07-20 01:52:32,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:52:32,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:52:32,134 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:52:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:52:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:52:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:52:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:52:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:52:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:52:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:52:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:52:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:52:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:52:32,340 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:52:32,340 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 01:52:32,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:52:32 BoogieIcfgContainer [2020-07-20 01:52:32,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:52:32,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:52:32,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:52:32,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:52:32,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:52:31" (1/3) ... [2020-07-20 01:52:32,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a3731a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:52:32, skipping insertion in model container [2020-07-20 01:52:32,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:52:31" (2/3) ... [2020-07-20 01:52:32,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a3731a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:52:32, skipping insertion in model container [2020-07-20 01:52:32,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:52:32" (3/3) ... [2020-07-20 01:52:32,358 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-07-20 01:52:32,369 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:52:32,378 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:52:32,393 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:52:32,425 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:52:32,425 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:52:32,425 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:52:32,425 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:52:32,426 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:52:32,426 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:52:32,426 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:52:32,426 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:52:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 01:52:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 01:52:32,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:52:32,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:52:32,464 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:52:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:52:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash 650151859, now seen corresponding path program 1 times [2020-07-20 01:52:32,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:52:32,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545169756] [2020-07-20 01:52:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1638b6f0 [2020-07-20 01:52:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:52:32,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545169756] [2020-07-20 01:52:32,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:52:32,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:52:32,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812259051] [2020-07-20 01:52:32,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:52:32,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:52:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:52:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:52:32,676 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-20 01:52:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:52:32,721 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-20 01:52:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:52:32,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 01:52:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:52:32,730 INFO L225 Difference]: With dead ends: 33 [2020-07-20 01:52:32,731 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 01:52:32,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:52:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 01:52:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-07-20 01:52:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 01:52:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 01:52:32,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-07-20 01:52:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:52:32,770 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 01:52:32,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:52:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 01:52:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 01:52:32,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:52:32,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:52:32,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:52:32,773 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:52:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:52:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1133927695, now seen corresponding path program 1 times [2020-07-20 01:52:32,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:52:32,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109945439] [2020-07-20 01:52:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1638b6f0 [2020-07-20 01:52:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:52:32,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109945439] [2020-07-20 01:52:32,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079377221] [2020-07-20 01:52:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13cf368a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:52:32,861 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13cf368a issued 3 check-sat command(s) [2020-07-20 01:52:32,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:52:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:52:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:52:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:52:32,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:52:32,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-07-20 01:52:32,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981298223] [2020-07-20 01:52:32,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:52:32,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:52:32,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:52:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:52:32,899 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-07-20 01:52:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:52:32,942 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-20 01:52:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 01:52:32,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 01:52:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:52:32,943 INFO L225 Difference]: With dead ends: 21 [2020-07-20 01:52:32,944 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 01:52:32,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:52:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 01:52:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-20 01:52:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 01:52:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 01:52:32,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-20 01:52:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:52:32,951 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 01:52:32,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:52:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 01:52:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:52:32,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:52:32,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:52:33,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:52:33,168 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:52:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:52:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1942427985, now seen corresponding path program 2 times [2020-07-20 01:52:33,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:52:33,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700071891] [2020-07-20 01:52:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1638b6f0 [2020-07-20 01:52:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:52:33,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700071891] [2020-07-20 01:52:33,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297072930] [2020-07-20 01:52:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@693bff2f 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 [2020-07-20 01:52:33,258 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@693bff2f issued 3 check-sat command(s) [2020-07-20 01:52:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:52:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 01:52:33,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:52:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:52:33,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:52:33,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-20 01:52:33,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386562365] [2020-07-20 01:52:33,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:52:33,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:52:33,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:52:33,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:52:33,272 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-07-20 01:52:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:52:33,315 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-07-20 01:52:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:52:33,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 01:52:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:52:33,317 INFO L225 Difference]: With dead ends: 23 [2020-07-20 01:52:33,317 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 01:52:33,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:52:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 01:52:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-20 01:52:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 01:52:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 01:52:33,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-20 01:52:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:52:33,323 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 01:52:33,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:52:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 01:52:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 01:52:33,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:52:33,325 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:52:33,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:52:33,539 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:52:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:52:33,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1522126099, now seen corresponding path program 3 times [2020-07-20 01:52:33,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:52:33,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719555637] [2020-07-20 01:52:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1638b6f0 [2020-07-20 01:52:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:52:33,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719555637] [2020-07-20 01:52:33,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482768759] [2020-07-20 01:52:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c6aedb5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-20 01:52:33,652 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c6aedb5 issued 3 check-sat command(s) [2020-07-20 01:52:33,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:52:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:52:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:52:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:52:33,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:52:33,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-20 01:52:33,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905853915] [2020-07-20 01:52:33,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:52:33,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:52:33,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:52:33,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:52:33,668 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-07-20 01:52:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:52:33,697 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-07-20 01:52:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:52:33,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 01:52:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:52:33,699 INFO L225 Difference]: With dead ends: 25 [2020-07-20 01:52:33,699 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 01:52:33,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:52:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 01:52:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-20 01:52:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 01:52:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 01:52:33,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-20 01:52:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:52:33,705 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 01:52:33,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:52:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 01:52:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 01:52:33,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:52:33,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:52:33,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:52:33,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:52:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:52:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1338939477, now seen corresponding path program 4 times [2020-07-20 01:52:33,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:52:33,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961729821] [2020-07-20 01:52:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1638b6f0 [2020-07-20 01:52:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 01:52:34,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961729821] [2020-07-20 01:52:34,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:52:34,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 01:52:34,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792530590] [2020-07-20 01:52:34,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:52:34,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:52:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:52:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:52:34,028 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-07-20 01:52:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:52:34,063 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-20 01:52:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:52:34,063 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-20 01:52:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:52:34,064 INFO L225 Difference]: With dead ends: 19 [2020-07-20 01:52:34,064 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:52:34,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:52:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:52:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:52:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:52:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:52:34,066 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-07-20 01:52:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:52:34,067 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:52:34,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:52:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:52:34,067 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:52:34,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 01:52:34,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:52:34,116 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:52:34,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:52:34,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:52:34,117 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:52:34,117 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:52:34,118 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:52:34,118 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:52:34,118 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 01:52:34,118 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:52:34,118 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:52:34,119 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 18) the Hoare annotation is: true [2020-07-20 01:52:34,119 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 18) no Hoare annotation was computed. [2020-07-20 01:52:34,119 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 01:52:34,119 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-07-20 01:52:34,119 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 18) no Hoare annotation was computed. [2020-07-20 01:52:34,120 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (<= main_~i~0 1000000) [2020-07-20 01:52:34,120 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (and (< 999999 main_~i~0) (<= main_~i~0 1000000)) [2020-07-20 01:52:34,120 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 01:52:34,120 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 01:52:34,121 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 01:52:34,121 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 01:52:34,121 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 01:52:34,121 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 01:52:34,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:52:34 BoogieIcfgContainer [2020-07-20 01:52:34,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:52:34,143 INFO L168 Benchmark]: Toolchain (without parser) took 2429.21 ms. Allocated memory was 143.7 MB in the beginning and 199.2 MB in the end (delta: 55.6 MB). Free memory was 101.7 MB in the beginning and 87.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 69.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:52:34,144 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:52:34,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.52 ms. Allocated memory is still 143.7 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:52:34,146 INFO L168 Benchmark]: Boogie Preprocessor took 116.58 ms. Allocated memory was 143.7 MB in the beginning and 199.2 MB in the end (delta: 55.6 MB). Free memory was 92.1 MB in the beginning and 179.4 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:52:34,147 INFO L168 Benchmark]: RCFGBuilder took 274.82 ms. Allocated memory is still 199.2 MB. Free memory was 179.4 MB in the beginning and 166.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:52:34,148 INFO L168 Benchmark]: TraceAbstraction took 1789.52 ms. Allocated memory is still 199.2 MB. Free memory was 166.1 MB in the beginning and 87.8 MB in the end (delta: 78.3 MB). Peak memory consumption was 78.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:52:34,153 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.52 ms. Allocated memory is still 143.7 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.58 ms. Allocated memory was 143.7 MB in the beginning and 199.2 MB in the end (delta: 55.6 MB). Free memory was 92.1 MB in the beginning and 179.4 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 274.82 ms. Allocated memory is still 199.2 MB. Free memory was 179.4 MB in the beginning and 166.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1789.52 ms. Allocated memory is still 199.2 MB. Free memory was 166.1 MB in the beginning and 87.8 MB in the end (delta: 78.3 MB). Peak memory consumption was 78.3 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: 15]: Loop Invariant Derived loop invariant: i <= 1000000 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 14 SDslu, 84 SDs, 0 SdLazy, 52 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 16 NumberOfFragments, 15 HoareAnnotationTreeSize, 11 FomulaSimplifications, 21 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 112 NumberOfCodeBlocks, 103 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 2502 SizeOfPredicates, 3 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 16/44 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...