/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:15:53,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:15:53,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:15:53,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:15:53,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:15:53,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:15:53,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:15:53,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:15:53,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:15:53,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:15:53,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:15:53,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:15:53,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:15:53,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:15:53,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:15:53,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:15:53,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:15:53,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:15:53,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:15:53,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:15:53,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:15:53,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:15:53,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:15:53,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:15:53,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:15:53,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:15:53,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:15:53,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:15:53,350 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 [2020-07-17 12:15:53,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:15:53,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:15:53,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:15:53,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:15:53,391 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:15:53,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:15:53,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:15:53,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:15:53,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:15:53,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:15:53,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:15:53,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:15:53,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:15:53,393 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:15:53,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:15:53,393 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:15:53,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:15:53,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:15:53,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:15:53,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:15:53,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:15:53,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:15:53,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:15:53,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:15:53,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:15:53,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:15:53,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:15:53,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:15:53,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:15:53,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:15:53,678 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:15:53,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:15:53,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:15:53,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:15:53,696 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:15:53,697 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-17 12:15:53,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676d6ac95/ffa62ccbfab34fe68f1e2e9bbc683812/FLAG3fb486090 [2020-07-17 12:15:54,246 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:15:54,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-17 12:15:54,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676d6ac95/ffa62ccbfab34fe68f1e2e9bbc683812/FLAG3fb486090 [2020-07-17 12:15:54,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676d6ac95/ffa62ccbfab34fe68f1e2e9bbc683812 [2020-07-17 12:15:54,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:15:54,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:15:54,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:54,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:15:54,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:15:54,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:54" (1/1) ... [2020-07-17 12:15:54,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53710ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:54, skipping insertion in model container [2020-07-17 12:15:54,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:54" (1/1) ... [2020-07-17 12:15:54,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:15:54,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:15:54,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:55,003 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:15:55,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:55,035 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:15:55,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55 WrapperNode [2020-07-17 12:15:55,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:55,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:15:55,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:15:55,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:15:55,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (1/1) ... [2020-07-17 12:15:55,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (1/1) ... [2020-07-17 12:15:55,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (1/1) ... [2020-07-17 12:15:55,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (1/1) ... [2020-07-17 12:15:55,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (1/1) ... [2020-07-17 12:15:55,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (1/1) ... [2020-07-17 12:15:55,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (1/1) ... [2020-07-17 12:15:55,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:15:55,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:15:55,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:15:55,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:15:55,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (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 [2020-07-17 12:15:55,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:15:55,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:15:55,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:15:55,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:15:55,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:15:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:15:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-17 12:15:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:15:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:15:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:15:55,512 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:15:55,513 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:15:55,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:55 BoogieIcfgContainer [2020-07-17 12:15:55,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:15:55,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:15:55,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:15:55,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:15:55,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:15:54" (1/3) ... [2020-07-17 12:15:55,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc014bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:55, skipping insertion in model container [2020-07-17 12:15:55,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:55" (2/3) ... [2020-07-17 12:15:55,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc014bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:55, skipping insertion in model container [2020-07-17 12:15:55,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:55" (3/3) ... [2020-07-17 12:15:55,532 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-07-17 12:15:55,546 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:15:55,556 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:15:55,578 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:15:55,629 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:15:55,630 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:15:55,631 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:15:55,631 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:15:55,632 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:15:55,633 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:15:55,633 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:15:55,633 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:15:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-17 12:15:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:15:55,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:55,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:55,684 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:55,692 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-07-17 12:15:55,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:55,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769801821] [2020-07-17 12:15:55,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:55,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769801821] [2020-07-17 12:15:55,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:55,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 12:15:55,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737693724] [2020-07-17 12:15:55,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 12:15:55,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:55,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 12:15:55,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:15:55,903 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-17 12:15:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:55,936 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-17 12:15:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 12:15:55,938 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-17 12:15:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:55,951 INFO L225 Difference]: With dead ends: 31 [2020-07-17 12:15:55,951 INFO L226 Difference]: Without dead ends: 14 [2020-07-17 12:15:55,957 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 [2020-07-17 12:15:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-17 12:15:56,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-17 12:15:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-17 12:15:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-17 12:15:56,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-07-17 12:15:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:56,013 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-17 12:15:56,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 12:15:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-17 12:15:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:15:56,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:56,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:56,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:15:56,016 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-07-17 12:15:56,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:56,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837339322] [2020-07-17 12:15:56,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:56,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837339322] [2020-07-17 12:15:56,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:56,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:15:56,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719445399] [2020-07-17 12:15:56,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:15:56,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:56,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:15:56,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:15:56,204 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-07-17 12:15:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:56,312 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-17 12:15:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:15:56,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-17 12:15:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:56,316 INFO L225 Difference]: With dead ends: 23 [2020-07-17 12:15:56,317 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 12:15:56,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:15:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 12:15:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-17 12:15:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 12:15:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-17 12:15:56,339 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-07-17 12:15:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:56,340 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-17 12:15:56,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:15:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-17 12:15:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-17 12:15:56,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:56,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:56,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:15:56,345 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:56,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-07-17 12:15:56,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:56,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703831413] [2020-07-17 12:15:56,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:56,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703831413] [2020-07-17 12:15:56,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369979382] [2020-07-17 12:15:56,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 12:15:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:56,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-17 12:15:56,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:57,023 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:57,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:57,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-17 12:15:57,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459083419] [2020-07-17 12:15:57,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 12:15:57,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:57,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 12:15:57,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:15:57,084 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2020-07-17 12:15:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:57,401 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-17 12:15:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 12:15:57,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-07-17 12:15:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:57,406 INFO L225 Difference]: With dead ends: 40 [2020-07-17 12:15:57,406 INFO L226 Difference]: Without dead ends: 34 [2020-07-17 12:15:57,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:15:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-17 12:15:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-07-17 12:15:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 12:15:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-17 12:15:57,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-17 12:15:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:57,417 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-17 12:15:57,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 12:15:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-17 12:15:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 12:15:57,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:57,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:57,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 12:15:57,632 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-07-17 12:15:57,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:57,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294168912] [2020-07-17 12:15:57,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-17 12:15:57,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294168912] [2020-07-17 12:15:57,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:57,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:15:57,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899888467] [2020-07-17 12:15:57,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:15:57,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:15:57,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:15:57,671 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-07-17 12:15:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:57,696 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-17 12:15:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:15:57,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-17 12:15:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:57,698 INFO L225 Difference]: With dead ends: 36 [2020-07-17 12:15:57,699 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 12:15:57,699 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 [2020-07-17 12:15:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 12:15:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-17 12:15:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 12:15:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-17 12:15:57,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-07-17 12:15:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:57,706 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-17 12:15:57,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:15:57,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-17 12:15:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 12:15:57,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:57,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:57,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:15:57,708 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-07-17 12:15:57,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:57,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551720796] [2020-07-17 12:15:57,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:57,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551720796] [2020-07-17 12:15:57,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775838829] [2020-07-17 12:15:57,766 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-17 12:15:57,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:15:57,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:57,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-17 12:15:57,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:57,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:57,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-17 12:15:57,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390887896] [2020-07-17 12:15:57,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:15:57,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:15:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:15:57,853 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-07-17 12:15:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:57,907 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-17 12:15:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:15:57,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-17 12:15:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:57,909 INFO L225 Difference]: With dead ends: 32 [2020-07-17 12:15:57,909 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 12:15:57,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:15:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 12:15:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-17 12:15:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 12:15:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-17 12:15:57,918 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2020-07-17 12:15:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:57,918 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-17 12:15:57,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:15:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-17 12:15:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:15:57,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:57,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:58,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:58,137 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:58,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-07-17 12:15:58,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:58,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960923535] [2020-07-17 12:15:58,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:58,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960923535] [2020-07-17 12:15:58,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557564204] [2020-07-17 12:15:58,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-17 12:15:58,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 12:15:58,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:58,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 12:15:58,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:58,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:58,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-17 12:15:58,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208584202] [2020-07-17 12:15:58,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 12:15:58,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 12:15:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:15:58,395 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2020-07-17 12:15:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:58,457 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-07-17 12:15:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:15:58,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-07-17 12:15:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:58,459 INFO L225 Difference]: With dead ends: 34 [2020-07-17 12:15:58,460 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 12:15:58,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:15:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 12:15:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-07-17 12:15:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-17 12:15:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-17 12:15:58,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2020-07-17 12:15:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:58,469 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-17 12:15:58,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 12:15:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-17 12:15:58,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:15:58,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:58,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:58,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:58,686 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:58,687 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2020-07-17 12:15:58,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:58,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900498815] [2020-07-17 12:15:58,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 12:15:58,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900498815] [2020-07-17 12:15:58,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841979432] [2020-07-17 12:15:58,993 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-17 12:15:59,043 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:15:59,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:59,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-17 12:15:59,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:59,303 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:59,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:59,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-07-17 12:15:59,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493487293] [2020-07-17 12:15:59,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 12:15:59,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 12:15:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:15:59,369 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 21 states. [2020-07-17 12:15:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:59,988 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-17 12:15:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 12:15:59,989 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2020-07-17 12:15:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:59,991 INFO L225 Difference]: With dead ends: 42 [2020-07-17 12:15:59,991 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 12:15:59,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 12:15:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 12:16:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-07-17 12:16:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 12:16:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-17 12:16:00,010 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-07-17 12:16:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:00,010 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-17 12:16:00,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 12:16:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-17 12:16:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:16:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:00,012 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:00,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:00,214 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-07-17 12:16:00,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:00,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63090765] [2020-07-17 12:16:00,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:00,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63090765] [2020-07-17 12:16:00,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051656535] [2020-07-17 12:16:00,323 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-07-17 12:16:00,364 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:16:00,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:00,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-17 12:16:00,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:00,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:00,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-17 12:16:00,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526965735] [2020-07-17 12:16:00,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 12:16:00,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:00,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 12:16:00,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:16:00,489 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-07-17 12:16:00,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:00,605 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-17 12:16:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 12:16:00,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-07-17 12:16:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:00,608 INFO L225 Difference]: With dead ends: 42 [2020-07-17 12:16:00,608 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 12:16:00,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:16:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 12:16:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-17 12:16:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 12:16:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-17 12:16:00,621 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-07-17 12:16:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:00,622 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-17 12:16:00,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 12:16:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-17 12:16:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 12:16:00,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:00,626 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:00,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:00,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-07-17 12:16:00,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:00,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126535934] [2020-07-17 12:16:00,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:00,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126535934] [2020-07-17 12:16:00,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811866060] [2020-07-17 12:16:00,958 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:00,995 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-17 12:16:00,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:00,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-17 12:16:01,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:01,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:01,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-17 12:16:01,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283027661] [2020-07-17 12:16:01,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 12:16:01,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:01,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 12:16:01,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:16:01,151 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 20 states. [2020-07-17 12:16:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:01,277 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-07-17 12:16:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:16:01,279 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2020-07-17 12:16:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:01,280 INFO L225 Difference]: With dead ends: 47 [2020-07-17 12:16:01,280 INFO L226 Difference]: Without dead ends: 38 [2020-07-17 12:16:01,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:16:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-17 12:16:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-17 12:16:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-17 12:16:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-17 12:16:01,293 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-07-17 12:16:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:01,293 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-17 12:16:01,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 12:16:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-17 12:16:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 12:16:01,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:01,295 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:01,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:01,496 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-07-17 12:16:01,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:01,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142693451] [2020-07-17 12:16:01,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:16:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:16:01,635 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:16:01,638 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:16:01,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:16:01,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:16:01 BoogieIcfgContainer [2020-07-17 12:16:01,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:16:01,703 INFO L168 Benchmark]: Toolchain (without parser) took 6952.62 ms. Allocated memory was 137.9 MB in the beginning and 248.0 MB in the end (delta: 110.1 MB). Free memory was 102.5 MB in the beginning and 169.8 MB in the end (delta: -67.3 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:01,712 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 12:16:01,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.41 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:01,716 INFO L168 Benchmark]: Boogie Preprocessor took 135.92 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 92.7 MB in the beginning and 182.7 MB in the end (delta: -90.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:01,718 INFO L168 Benchmark]: RCFGBuilder took 345.64 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 169.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:01,726 INFO L168 Benchmark]: TraceAbstraction took 6178.16 ms. Allocated memory was 203.4 MB in the beginning and 248.0 MB in the end (delta: 44.6 MB). Free memory was 168.9 MB in the beginning and 169.8 MB in the end (delta: -917.1 kB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:01,734 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.41 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.92 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 92.7 MB in the beginning and 182.7 MB in the end (delta: -90.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.64 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 169.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6178.16 ms. Allocated memory was 203.4 MB in the beginning and 248.0 MB in the end (delta: 44.6 MB). Free memory was 168.9 MB in the beginning and 169.8 MB in the end (delta: -917.1 kB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i