/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:15:02,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:15:02,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:15:02,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 23:15:02,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 23:15:02,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 23:15:02,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 23:15:02,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 23:15:02,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 23:15:02,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 23:15:02,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 23:15:02,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 23:15:02,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 23:15:02,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 23:15:02,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 23:15:02,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 23:15:02,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 23:15:02,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 23:15:02,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 23:15:02,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 23:15:02,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:15:02,964 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:15:02,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:15:02,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:15:02,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:15:02,969 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:15:02,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:15:02,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:15:02,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:15:02,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:15:02,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:15:02,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:15:02,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:15:02,972 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:15:02,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:15:02,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:15:02,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:15:02,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:15:02,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:15:02,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:15:02,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:15:02,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:15:02,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:15:02,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:15:02,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:15:02,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:15:02,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:15:03,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:15:03,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:15:03,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:15:03,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:15:03,426 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:15:03,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2020-12-21 23:15:03,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26b43f56f/a7d3664daf2e4e7d83ceea78b962b376/FLAGa4069b501 [2020-12-21 23:15:04,056 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:15:04,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2020-12-21 23:15:04,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26b43f56f/a7d3664daf2e4e7d83ceea78b962b376/FLAGa4069b501 [2020-12-21 23:15:04,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26b43f56f/a7d3664daf2e4e7d83ceea78b962b376 [2020-12-21 23:15:04,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:15:04,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:15:04,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:15:04,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:15:04,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:15:04,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ec7cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04, skipping insertion in model container [2020-12-21 23:15:04,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:15:04,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:15:04,624 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2020-12-21 23:15:04,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:15:04,651 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:15:04,664 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2020-12-21 23:15:04,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:15:04,688 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:15:04,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04 WrapperNode [2020-12-21 23:15:04,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:15:04,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:15:04,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:15:04,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:15:04,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:15:04,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:15:04,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:15:04,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:15:04,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (1/1) ... [2020-12-21 23:15:04,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:15:04,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:15:04,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:15:04,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:15:04,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (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 [2020-12-21 23:15:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:15:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:15:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 23:15:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:15:04,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:15:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 23:15:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 23:15:05,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:15:05,279 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 23:15:05,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:15:05 BoogieIcfgContainer [2020-12-21 23:15:05,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:15:05,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:15:05,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:15:05,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:15:05,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:15:04" (1/3) ... [2020-12-21 23:15:05,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdd6d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:15:05, skipping insertion in model container [2020-12-21 23:15:05,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:15:04" (2/3) ... [2020-12-21 23:15:05,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdd6d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:15:05, skipping insertion in model container [2020-12-21 23:15:05,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:15:05" (3/3) ... [2020-12-21 23:15:05,308 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2020-12-21 23:15:05,326 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:15:05,334 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:15:05,360 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:15:05,385 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:15:05,385 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:15:05,386 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:15:05,386 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:15:05,386 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:15:05,386 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:15:05,386 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:15:05,387 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:15:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-21 23:15:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 23:15:05,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:05,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:05,408 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash 212076531, now seen corresponding path program 1 times [2020-12-21 23:15:05,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:05,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652397611] [2020-12-21 23:15:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:05,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652397611] [2020-12-21 23:15:05,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:15:05,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:15:05,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961554331] [2020-12-21 23:15:05,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:15:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:05,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:15:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:15:05,650 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-12-21 23:15:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:05,697 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-12-21 23:15:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:15:05,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 23:15:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:05,741 INFO L225 Difference]: With dead ends: 35 [2020-12-21 23:15:05,741 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 23:15:05,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:15:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 23:15:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2020-12-21 23:15:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-21 23:15:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-21 23:15:05,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-12-21 23:15:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:05,783 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-21 23:15:05,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:15:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-21 23:15:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 23:15:05,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:05,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:05,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:15:05,784 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1435974389, now seen corresponding path program 1 times [2020-12-21 23:15:05,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:05,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231093535] [2020-12-21 23:15:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:05,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231093535] [2020-12-21 23:15:05,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583885661] [2020-12-21 23:15:05,837 INFO L95 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 [2020-12-21 23:15:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:05,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 23:15:05,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:05,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:05,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 23:15:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726546040] [2020-12-21 23:15:05,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:15:05,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:05,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:15:05,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:15:05,974 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-12-21 23:15:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:06,008 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-12-21 23:15:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:15:06,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-21 23:15:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:06,009 INFO L225 Difference]: With dead ends: 25 [2020-12-21 23:15:06,010 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 23:15:06,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:15:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 23:15:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2020-12-21 23:15:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 23:15:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-21 23:15:06,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-12-21 23:15:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:06,015 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-21 23:15:06,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:15:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-21 23:15:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 23:15:06,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:06,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:06,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 23:15:06,220 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash 780776823, now seen corresponding path program 2 times [2020-12-21 23:15:06,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:06,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129139782] [2020-12-21 23:15:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 23:15:06,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129139782] [2020-12-21 23:15:06,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:15:06,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 23:15:06,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408575111] [2020-12-21 23:15:06,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:15:06,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:06,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:15:06,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:15:06,365 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-12-21 23:15:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:06,431 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-12-21 23:15:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:15:06,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-21 23:15:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:06,434 INFO L225 Difference]: With dead ends: 18 [2020-12-21 23:15:06,434 INFO L226 Difference]: Without dead ends: 14 [2020-12-21 23:15:06,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:15:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-21 23:15:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-21 23:15:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 23:15:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-21 23:15:06,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-12-21 23:15:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:06,440 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-21 23:15:06,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:15:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-21 23:15:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 23:15:06,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:06,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:06,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 23:15:06,442 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1564056878, now seen corresponding path program 1 times [2020-12-21 23:15:06,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:06,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897519964] [2020-12-21 23:15:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 23:15:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897519964] [2020-12-21 23:15:06,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619118913] [2020-12-21 23:15:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 23:15:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:06,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 23:15:06,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 23:15:06,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:06,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 23:15:06,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496683140] [2020-12-21 23:15:06,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:15:06,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:06,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:15:06,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:15:06,594 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2020-12-21 23:15:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:06,625 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-21 23:15:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 23:15:06,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-21 23:15:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:06,626 INFO L225 Difference]: With dead ends: 24 [2020-12-21 23:15:06,627 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 23:15:06,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:15:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 23:15:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-21 23:15:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 23:15:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-21 23:15:06,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-12-21 23:15:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:06,632 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-21 23:15:06,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:15:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-21 23:15:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 23:15:06,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:06,633 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:06,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:06,847 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 71614736, now seen corresponding path program 2 times [2020-12-21 23:15:06,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:06,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741802524] [2020-12-21 23:15:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 23:15:06,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741802524] [2020-12-21 23:15:06,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032122376] [2020-12-21 23:15:06,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 23:15:06,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:15:06,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:15:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 23:15:07,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:07,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 23:15:07,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346603031] [2020-12-21 23:15:07,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 23:15:07,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:07,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 23:15:07,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:15:07,080 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-12-21 23:15:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:07,131 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-21 23:15:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:15:07,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-21 23:15:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:07,133 INFO L225 Difference]: With dead ends: 26 [2020-12-21 23:15:07,133 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 23:15:07,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:15:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 23:15:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-21 23:15:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 23:15:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-21 23:15:07,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-12-21 23:15:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:07,148 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-21 23:15:07,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 23:15:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-21 23:15:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 23:15:07,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:07,150 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:07,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:07,364 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:07,366 INFO L82 PathProgramCache]: Analyzing trace with hash -5994546, now seen corresponding path program 3 times [2020-12-21 23:15:07,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:07,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326492314] [2020-12-21 23:15:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 23:15:07,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326492314] [2020-12-21 23:15:07,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776931535] [2020-12-21 23:15:07,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 23:15:07,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 23:15:07,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:07,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 23:15:07,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:07,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 23:15:07,606 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 23:15:07,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 23:15:07,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:15:07,764 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 23:15:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-21 23:15:07,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:07,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2020-12-21 23:15:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715385980] [2020-12-21 23:15:07,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 23:15:07,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 23:15:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:15:07,787 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-12-21 23:15:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:07,916 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-21 23:15:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 23:15:07,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-21 23:15:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:07,918 INFO L225 Difference]: With dead ends: 31 [2020-12-21 23:15:07,918 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 23:15:07,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-21 23:15:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 23:15:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-21 23:15:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 23:15:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-21 23:15:07,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-12-21 23:15:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:07,923 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-21 23:15:07,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 23:15:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-21 23:15:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 23:15:07,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:07,924 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:08,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:08,139 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:08,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:08,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1549880355, now seen corresponding path program 4 times [2020-12-21 23:15:08,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:08,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150462022] [2020-12-21 23:15:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:15:08,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150462022] [2020-12-21 23:15:08,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971260503] [2020-12-21 23:15:08,220 INFO L93 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 [2020-12-21 23:15:08,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:15:08,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:08,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 23:15:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:15:08,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:08,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 23:15:08,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356353591] [2020-12-21 23:15:08,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 23:15:08,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 23:15:08,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:15:08,376 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-21 23:15:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:08,431 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-21 23:15:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:15:08,432 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-21 23:15:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:08,433 INFO L225 Difference]: With dead ends: 32 [2020-12-21 23:15:08,433 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 23:15:08,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:15:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 23:15:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-21 23:15:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 23:15:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-21 23:15:08,444 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-12-21 23:15:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:08,444 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-21 23:15:08,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 23:15:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-21 23:15:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 23:15:08,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:08,445 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:08,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 23:15:08,660 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:08,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash 258175967, now seen corresponding path program 5 times [2020-12-21 23:15:08,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:08,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75813979] [2020-12-21 23:15:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:15:08,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75813979] [2020-12-21 23:15:08,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478188993] [2020-12-21 23:15:08,758 INFO L93 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 [2020-12-21 23:15:08,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 23:15:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 23:15:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:15:08,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:08,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 23:15:08,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477879317] [2020-12-21 23:15:08,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 23:15:08,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 23:15:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 23:15:08,883 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2020-12-21 23:15:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:08,924 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-21 23:15:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 23:15:08,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-21 23:15:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:08,925 INFO L225 Difference]: With dead ends: 34 [2020-12-21 23:15:08,925 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 23:15:08,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 23:15:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 23:15:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-21 23:15:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 23:15:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-21 23:15:08,930 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-12-21 23:15:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:08,930 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-21 23:15:08,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 23:15:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-21 23:15:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 23:15:08,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:08,932 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:09,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:09,145 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1661453471, now seen corresponding path program 6 times [2020-12-21 23:15:09,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:09,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56583430] [2020-12-21 23:15:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:15:09,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56583430] [2020-12-21 23:15:09,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637916839] [2020-12-21 23:15:09,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:09,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-21 23:15:09,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 23:15:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:09,426 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:15:09,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:15:09,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 23:15:09,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 23:15:09,927 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-12-21 23:15:10,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 23:15:12,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2020-12-21 23:15:18,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 15 disjuncts [2020-12-21 23:16:41,143 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:18:43,821 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.