/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/loop-zilu/benchmark23_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:51:11,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:51:11,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:51:11,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:51:11,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:51:11,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:51:11,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:51:11,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:51:11,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:51:11,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:51:11,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:51:11,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:51:11,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:51:11,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:51:11,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:51:11,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:51:11,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:51:11,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:51:11,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:51:11,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:51:11,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:51:11,875 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:51:11,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:51:11,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:51:11,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:51:11,877 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:51:11,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:51:11,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:51:11,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:51:11,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:51:11,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:51:11,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:51:11,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:51:11,879 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:51:11,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:51:11,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:51:11,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:51:11,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:51:11,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:51:11,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:51:11,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:51:11,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:51:11,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:51:11,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:51:11,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:51:11,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:51:11,883 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:51:12,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:51:12,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:51:12,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:51:12,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:51:12,254 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:51:12,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2020-12-22 04:51:12,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2790ecd3/51913bb0e8a9433c9d382686c6c12f27/FLAG4ac5074cc [2020-12-22 04:51:12,990 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:51:12,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2020-12-22 04:51:13,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2790ecd3/51913bb0e8a9433c9d382686c6c12f27/FLAG4ac5074cc [2020-12-22 04:51:13,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2790ecd3/51913bb0e8a9433c9d382686c6c12f27 [2020-12-22 04:51:13,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:51:13,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:51:13,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:51:13,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:51:13,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:51:13,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c383357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13, skipping insertion in model container [2020-12-22 04:51:13,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:51:13,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:51:13,542 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/loop-zilu/benchmark23_conjunctive.i[873,886] [2020-12-22 04:51:13,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:51:13,564 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:51:13,579 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/loop-zilu/benchmark23_conjunctive.i[873,886] [2020-12-22 04:51:13,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:51:13,599 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:51:13,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13 WrapperNode [2020-12-22 04:51:13,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:51:13,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:51:13,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:51:13,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:51:13,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:51:13,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:51:13,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:51:13,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:51:13,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (1/1) ... [2020-12-22 04:51:13,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:51:13,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:51:13,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:51:13,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:51:13,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (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 [2020-12-22 04:51:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:51:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:51:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:51:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:51:14,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:51:14,047 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:51:14,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:51:14 BoogieIcfgContainer [2020-12-22 04:51:14,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:51:14,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:51:14,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:51:14,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:51:14,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:51:13" (1/3) ... [2020-12-22 04:51:14,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f37a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:51:14, skipping insertion in model container [2020-12-22 04:51:14,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:13" (2/3) ... [2020-12-22 04:51:14,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f37a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:51:14, skipping insertion in model container [2020-12-22 04:51:14,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:51:14" (3/3) ... [2020-12-22 04:51:14,059 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2020-12-22 04:51:14,066 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:51:14,075 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:51:14,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:51:14,189 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:51:14,189 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:51:14,189 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:51:14,189 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:51:14,189 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:51:14,190 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:51:14,190 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:51:14,190 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:51:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 04:51:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:51:14,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:14,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:14,212 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times [2020-12-22 04:51:14,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:14,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436901256] [2020-12-22 04:51:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:14,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436901256] [2020-12-22 04:51:14,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:51:14,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:51:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227257592] [2020-12-22 04:51:14,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:51:14,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:51:14,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:51:14,439 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-22 04:51:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:14,459 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-22 04:51:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:51:14,461 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 04:51:14,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:14,471 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:51:14,472 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:51:14,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:51:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:51:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:51:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:51:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 04:51:14,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2020-12-22 04:51:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:14,517 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 04:51:14,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:51:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 04:51:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:51:14,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:14,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:14,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:51:14,518 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times [2020-12-22 04:51:14,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:14,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043632182] [2020-12-22 04:51:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:14,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043632182] [2020-12-22 04:51:14,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:51:14,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:51:14,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793625066] [2020-12-22 04:51:14,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:51:14,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:14,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:51:14,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:51:14,598 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2020-12-22 04:51:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:14,616 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-22 04:51:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:51:14,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 04:51:14,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:14,618 INFO L225 Difference]: With dead ends: 13 [2020-12-22 04:51:14,618 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:51:14,619 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 [2020-12-22 04:51:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:51:14,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 04:51:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:51:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:51:14,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 04:51:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:14,624 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:51:14,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:51:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:51:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:51:14,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:14,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:14,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:51:14,625 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash 183170323, now seen corresponding path program 1 times [2020-12-22 04:51:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:14,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699140074] [2020-12-22 04:51:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:14,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699140074] [2020-12-22 04:51:14,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719396748] [2020-12-22 04:51:14,678 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 [2020-12-22 04:51:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:51:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:14,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:14,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-22 04:51:14,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363438218] [2020-12-22 04:51:14,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:51:14,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:14,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:51:14,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:51:14,845 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2020-12-22 04:51:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:14,867 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-22 04:51:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:51:14,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 04:51:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:14,868 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:51:14,868 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:51:14,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:51:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:51:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:51:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:51:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:51:14,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-22 04:51:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:14,873 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:51:14,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:51:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:51:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:51:14,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:14,874 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:15,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:51:15,090 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:15,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1384978123, now seen corresponding path program 2 times [2020-12-22 04:51:15,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:15,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530900042] [2020-12-22 04:51:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:15,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530900042] [2020-12-22 04:51:15,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804890638] [2020-12-22 04:51:15,146 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 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 [2020-12-22 04:51:15,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:15,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:15,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:51:15,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:15,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:15,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-12-22 04:51:15,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645194276] [2020-12-22 04:51:15,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:51:15,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:15,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:51:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:51:15,275 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2020-12-22 04:51:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:15,300 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-22 04:51:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:51:15,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 04:51:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:15,302 INFO L225 Difference]: With dead ends: 15 [2020-12-22 04:51:15,302 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:51:15,303 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 [2020-12-22 04:51:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:51:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:51:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:51:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:51:15,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-22 04:51:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:15,307 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:51:15,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:51:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:51:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:51:15,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:15,308 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:15,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:15,524 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash -13685741, now seen corresponding path program 3 times [2020-12-22 04:51:15,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:15,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508258214] [2020-12-22 04:51:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:15,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508258214] [2020-12-22 04:51:15,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565458724] [2020-12-22 04:51:15,637 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 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 [2020-12-22 04:51:15,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:51:15,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:15,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:51:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:15,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:15,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-22 04:51:15,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068603613] [2020-12-22 04:51:15,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:51:15,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:15,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:51:15,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:51:15,736 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-22 04:51:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:15,756 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:51:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:51:15,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:51:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:15,758 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:51:15,758 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:51:15,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:51:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:51:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:51:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:51:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-22 04:51:15,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-22 04:51:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:15,763 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-22 04:51:15,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:51:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-22 04:51:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:51:15,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:15,764 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:15,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:15,979 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:15,980 INFO L82 PathProgramCache]: Analyzing trace with hash -422592565, now seen corresponding path program 4 times [2020-12-22 04:51:15,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:15,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116378912] [2020-12-22 04:51:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:16,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116378912] [2020-12-22 04:51:16,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904110126] [2020-12-22 04:51:16,044 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 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 [2020-12-22 04:51:16,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:16,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:51:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:16,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:16,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-22 04:51:16,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848285508] [2020-12-22 04:51:16,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:51:16,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:51:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:51:16,118 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2020-12-22 04:51:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:16,134 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-22 04:51:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:51:16,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 04:51:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:16,135 INFO L225 Difference]: With dead ends: 17 [2020-12-22 04:51:16,135 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:51:16,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:51:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:51:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:51:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:51:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:51:16,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-22 04:51:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:16,140 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:51:16,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:51:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:51:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:51:16,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:16,141 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:16,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:16,356 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash -213802221, now seen corresponding path program 5 times [2020-12-22 04:51:16,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:16,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889081132] [2020-12-22 04:51:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889081132] [2020-12-22 04:51:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274812318] [2020-12-22 04:51:16,431 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 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 [2020-12-22 04:51:16,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:51:16,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:51:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:16,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:16,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-22 04:51:16,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52043183] [2020-12-22 04:51:16,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:51:16,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:16,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:51:16,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:51:16,519 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2020-12-22 04:51:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:16,535 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:51:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:51:16,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-22 04:51:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:16,536 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:51:16,536 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:51:16,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:51:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:51:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:51:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:51:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-22 04:51:16,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-22 04:51:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:16,541 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-22 04:51:16,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:51:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-22 04:51:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:51:16,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:16,542 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:16,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:51:16,758 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1963731147, now seen corresponding path program 6 times [2020-12-22 04:51:16,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:16,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269310016] [2020-12-22 04:51:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:16,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269310016] [2020-12-22 04:51:16,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98425603] [2020-12-22 04:51:16,843 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 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 [2020-12-22 04:51:16,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:51:16,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:16,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:51:16,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:16,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:16,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-12-22 04:51:16,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063254513] [2020-12-22 04:51:16,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:51:16,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:51:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:51:16,927 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2020-12-22 04:51:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:16,949 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-22 04:51:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:51:16,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-22 04:51:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:16,951 INFO L225 Difference]: With dead ends: 19 [2020-12-22 04:51:16,951 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 04:51:16,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:51:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 04:51:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 04:51:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:51:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:51:16,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-22 04:51:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:16,955 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:51:16,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:51:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:51:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:51:16,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:16,958 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:17,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:17,166 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:17,167 INFO L82 PathProgramCache]: Analyzing trace with hash 747788819, now seen corresponding path program 7 times [2020-12-22 04:51:17,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:17,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218696191] [2020-12-22 04:51:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:17,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218696191] [2020-12-22 04:51:17,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849014456] [2020-12-22 04:51:17,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-22 04:51:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:51:17,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:17,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:17,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 04:51:17,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582224331] [2020-12-22 04:51:17,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:51:17,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:17,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:51:17,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:51:17,329 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2020-12-22 04:51:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:17,351 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:51:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:51:17,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 04:51:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:17,352 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:51:17,352 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:51:17,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:51:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:51:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 04:51:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:51:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-22 04:51:17,356 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-22 04:51:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:17,356 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-22 04:51:17,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:51:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-22 04:51:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:51:17,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:17,357 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:17,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:17,571 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:17,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1708282315, now seen corresponding path program 8 times [2020-12-22 04:51:17,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:17,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768344186] [2020-12-22 04:51:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768344186] [2020-12-22 04:51:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776931535] [2020-12-22 04:51:17,695 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:17,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:17,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:17,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:51:17,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:17,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:17,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-22 04:51:17,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512194639] [2020-12-22 04:51:17,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:51:17,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:17,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:51:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:51:17,822 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 11 states. [2020-12-22 04:51:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:17,848 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-22 04:51:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:51:17,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-22 04:51:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:17,850 INFO L225 Difference]: With dead ends: 21 [2020-12-22 04:51:17,850 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:51:17,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:51:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:51:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:51:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:51:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:51:17,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-22 04:51:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:17,859 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:51:17,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:51:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:51:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:51:17,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:17,862 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:18,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:51:18,076 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1418809619, now seen corresponding path program 9 times [2020-12-22 04:51:18,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:18,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769633963] [2020-12-22 04:51:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:18,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769633963] [2020-12-22 04:51:18,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006473398] [2020-12-22 04:51:18,210 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:18,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:51:18,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:18,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:51:18,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:18,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:18,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-22 04:51:18,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275986159] [2020-12-22 04:51:18,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:51:18,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:18,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:51:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:51:18,308 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 12 states. [2020-12-22 04:51:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:18,326 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:51:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:51:18,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 04:51:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:18,327 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:51:18,327 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:51:18,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:51:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:51:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 04:51:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:51:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-22 04:51:18,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-12-22 04:51:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:18,332 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-22 04:51:18,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:51:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-22 04:51:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:51:18,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:18,333 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:18,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:18,538 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:18,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1035090635, now seen corresponding path program 10 times [2020-12-22 04:51:18,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:18,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134118837] [2020-12-22 04:51:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:18,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134118837] [2020-12-22 04:51:18,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696072755] [2020-12-22 04:51:18,662 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:18,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:51:18,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:18,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:18,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 04:51:18,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401671610] [2020-12-22 04:51:18,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:51:18,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:18,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:51:18,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:51:18,742 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 13 states. [2020-12-22 04:51:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:18,766 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-22 04:51:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:51:18,767 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-22 04:51:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:18,767 INFO L225 Difference]: With dead ends: 23 [2020-12-22 04:51:18,768 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:51:18,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:51:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:51:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:51:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:51:18,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:51:18,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-22 04:51:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:18,772 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:51:18,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:51:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:51:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:51:18,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:18,774 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:18,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:18,987 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:18,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2024704019, now seen corresponding path program 11 times [2020-12-22 04:51:18,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:18,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503650152] [2020-12-22 04:51:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:19,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503650152] [2020-12-22 04:51:19,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467689927] [2020-12-22 04:51:19,092 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:19,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:51:19,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:19,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:51:19,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:19,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:19,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 04:51:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492321626] [2020-12-22 04:51:19,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:51:19,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:51:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:51:19,183 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 14 states. [2020-12-22 04:51:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:19,207 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:51:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:51:19,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-12-22 04:51:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:19,209 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:51:19,209 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:51:19,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:51:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:51:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 04:51:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:51:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 04:51:19,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-22 04:51:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:19,213 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 04:51:19,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:51:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 04:51:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:51:19,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:19,214 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:19,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:51:19,428 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:19,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1657019445, now seen corresponding path program 12 times [2020-12-22 04:51:19,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:19,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928677775] [2020-12-22 04:51:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:19,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928677775] [2020-12-22 04:51:19,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993941500] [2020-12-22 04:51:19,569 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:19,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:51:19,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:19,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:51:19,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:19,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:19,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-22 04:51:19,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840885060] [2020-12-22 04:51:19,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:51:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:51:19,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:51:19,674 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 15 states. [2020-12-22 04:51:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:19,705 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-22 04:51:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:51:19,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 04:51:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:19,706 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:51:19,706 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:51:19,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:51:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:51:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 04:51:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:51:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:51:19,710 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-12-22 04:51:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:19,711 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:51:19,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:51:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:51:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:51:19,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:19,712 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:19,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:51:19,927 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:19,928 INFO L82 PathProgramCache]: Analyzing trace with hash 173670163, now seen corresponding path program 13 times [2020-12-22 04:51:19,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:19,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814697456] [2020-12-22 04:51:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:20,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814697456] [2020-12-22 04:51:20,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522208977] [2020-12-22 04:51:20,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:20,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:51:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:20,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:20,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-22 04:51:20,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539868497] [2020-12-22 04:51:20,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:51:20,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:20,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:51:20,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:51:20,149 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 16 states. [2020-12-22 04:51:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:20,172 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:51:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:51:20,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 04:51:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:20,173 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:51:20,173 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:51:20,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:51:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:51:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 04:51:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:51:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 04:51:20,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-12-22 04:51:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:20,178 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 04:51:20,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:51:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 04:51:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:51:20,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:20,179 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:20,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:51:20,391 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:20,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1090473163, now seen corresponding path program 14 times [2020-12-22 04:51:20,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:20,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274741961] [2020-12-22 04:51:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:20,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274741961] [2020-12-22 04:51:20,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292980275] [2020-12-22 04:51:20,541 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:20,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:20,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:20,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:51:20,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:20,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:20,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-12-22 04:51:20,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843314825] [2020-12-22 04:51:20,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:51:20,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:51:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:51:20,649 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 17 states. [2020-12-22 04:51:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:20,699 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-22 04:51:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:51:20,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 04:51:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:20,700 INFO L225 Difference]: With dead ends: 27 [2020-12-22 04:51:20,700 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:51:20,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:51:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:51:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 04:51:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:51:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:51:20,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-12-22 04:51:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:20,704 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:51:20,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:51:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:51:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:51:20,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:20,705 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:20,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:20,918 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash -553404909, now seen corresponding path program 15 times [2020-12-22 04:51:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:20,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418564920] [2020-12-22 04:51:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:21,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418564920] [2020-12-22 04:51:21,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840958260] [2020-12-22 04:51:21,082 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:21,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 04:51:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:51:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:21,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:21,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-12-22 04:51:21,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670187608] [2020-12-22 04:51:21,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:51:21,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:21,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:51:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:51:21,189 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 18 states. [2020-12-22 04:51:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:21,224 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:51:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:51:21,225 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 04:51:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:21,226 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:51:21,226 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:51:21,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:51:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:51:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 04:51:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:51:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-22 04:51:21,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-12-22 04:51:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:21,231 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-22 04:51:21,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:51:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-22 04:51:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:51:21,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:21,232 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:21,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:51:21,447 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:21,447 INFO L82 PathProgramCache]: Analyzing trace with hash 25982411, now seen corresponding path program 16 times [2020-12-22 04:51:21,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:21,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138211924] [2020-12-22 04:51:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:21,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138211924] [2020-12-22 04:51:21,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660023979] [2020-12-22 04:51:21,653 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:21,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:51:21,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:21,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:21,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 04:51:21,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757115877] [2020-12-22 04:51:21,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:51:21,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:21,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:51:21,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:51:21,760 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 19 states. [2020-12-22 04:51:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:21,780 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-22 04:51:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:51:21,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-12-22 04:51:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:21,781 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:51:21,781 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:51:21,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:51:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:51:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 04:51:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:51:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:51:21,785 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-12-22 04:51:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:21,786 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:51:21,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:51:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:51:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:51:21,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:21,787 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:22,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:51:22,001 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:22,002 INFO L82 PathProgramCache]: Analyzing trace with hash 807120147, now seen corresponding path program 17 times [2020-12-22 04:51:22,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:22,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738463591] [2020-12-22 04:51:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:22,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738463591] [2020-12-22 04:51:22,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136521009] [2020-12-22 04:51:22,197 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:22,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:51:22,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:22,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:51:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:22,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:22,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 04:51:22,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334645682] [2020-12-22 04:51:22,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:51:22,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:22,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:51:22,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:51:22,293 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 20 states. [2020-12-22 04:51:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:22,327 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:51:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:51:22,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-12-22 04:51:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:22,328 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:51:22,329 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:51:22,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:51:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:51:22,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 04:51:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:51:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-22 04:51:22,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-12-22 04:51:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:22,333 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-22 04:51:22,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:51:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-22 04:51:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:51:22,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:22,334 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:22,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:22,548 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash -747413813, now seen corresponding path program 18 times [2020-12-22 04:51:22,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:22,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727681062] [2020-12-22 04:51:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727681062] [2020-12-22 04:51:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517345069] [2020-12-22 04:51:22,763 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:22,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 04:51:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:51:22,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:22,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:22,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-12-22 04:51:22,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818968412] [2020-12-22 04:51:22,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:51:22,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:22,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:51:22,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:51:22,859 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 21 states. [2020-12-22 04:51:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:22,887 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-22 04:51:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:51:22,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-12-22 04:51:22,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:22,888 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:51:22,888 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:51:22,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:51:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:51:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 04:51:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:51:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:51:22,892 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-12-22 04:51:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:22,892 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:51:22,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:51:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:51:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:51:22,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:22,893 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:23,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:23,108 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1693326317, now seen corresponding path program 19 times [2020-12-22 04:51:23,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:23,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966942079] [2020-12-22 04:51:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:23,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966942079] [2020-12-22 04:51:23,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100920953] [2020-12-22 04:51:23,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:51:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:23,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:23,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-12-22 04:51:23,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961004470] [2020-12-22 04:51:23,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:51:23,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:23,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:51:23,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:51:23,444 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 22 states. [2020-12-22 04:51:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:23,479 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:51:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:51:23,480 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-12-22 04:51:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:23,480 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:51:23,481 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:51:23,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:51:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:51:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 04:51:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:51:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-22 04:51:23,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-12-22 04:51:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:23,485 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-22 04:51:23,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:51:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-22 04:51:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:51:23,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:23,486 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:23,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:23,701 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:23,702 INFO L82 PathProgramCache]: Analyzing trace with hash -951842869, now seen corresponding path program 20 times [2020-12-22 04:51:23,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:23,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920447672] [2020-12-22 04:51:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:23,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920447672] [2020-12-22 04:51:23,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801265191] [2020-12-22 04:51:23,944 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:23,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:51:23,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:24,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:24,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-12-22 04:51:24,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721303345] [2020-12-22 04:51:24,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:51:24,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:51:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:51:24,055 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 23 states. [2020-12-22 04:51:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:24,088 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-22 04:51:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:51:24,088 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-12-22 04:51:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:24,089 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:51:24,089 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:51:24,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:51:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:51:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:51:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:51:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:51:24,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-12-22 04:51:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:24,093 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:51:24,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:51:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:51:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:51:24,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:24,094 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:24,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:51:24,308 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:24,308 INFO L82 PathProgramCache]: Analyzing trace with hash 559307539, now seen corresponding path program 21 times [2020-12-22 04:51:24,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:24,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006058010] [2020-12-22 04:51:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:24,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006058010] [2020-12-22 04:51:24,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165009867] [2020-12-22 04:51:24,581 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:24,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:51:24,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:24,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:51:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:24,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:24,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-12-22 04:51:24,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284105681] [2020-12-22 04:51:24,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:51:24,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:24,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:51:24,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:51:24,710 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 24 states. [2020-12-22 04:51:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:24,734 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:51:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:51:24,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-22 04:51:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:24,735 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:51:24,735 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:51:24,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:51:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:51:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:51:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:51:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-22 04:51:24,741 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-12-22 04:51:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:24,741 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-22 04:51:24,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:51:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-22 04:51:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:51:24,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:24,742 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:24,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:51:24,956 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:24,956 INFO L82 PathProgramCache]: Analyzing trace with hash 160329931, now seen corresponding path program 22 times [2020-12-22 04:51:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:24,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880067235] [2020-12-22 04:51:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880067235] [2020-12-22 04:51:25,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331870654] [2020-12-22 04:51:25,241 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:25,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:25,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:51:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:25,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:25,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-12-22 04:51:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037484687] [2020-12-22 04:51:25,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:51:25,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:51:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:51:25,342 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 25 states. [2020-12-22 04:51:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:25,381 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-22 04:51:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:51:25,381 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-12-22 04:51:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:25,382 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:51:25,382 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:51:25,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:51:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:51:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 04:51:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:51:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:51:25,386 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-22 04:51:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:25,386 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:51:25,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:51:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:51:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:51:25,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:25,387 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:25,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:25,600 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash 676925971, now seen corresponding path program 23 times [2020-12-22 04:51:25,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:25,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789666151] [2020-12-22 04:51:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789666151] [2020-12-22 04:51:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213446676] [2020-12-22 04:51:25,951 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:25,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 04:51:25,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:51:25,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:26,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:26,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-12-22 04:51:26,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309214087] [2020-12-22 04:51:26,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:51:26,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:26,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:51:26,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:51:26,051 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 26 states. [2020-12-22 04:51:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:26,092 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:51:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:51:26,092 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-12-22 04:51:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:26,093 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:51:26,093 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:51:26,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:51:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:51:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 04:51:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:51:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-22 04:51:26,101 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-12-22 04:51:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:26,101 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-22 04:51:26,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:51:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-22 04:51:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:51:26,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:26,102 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:26,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:51:26,316 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash -488465973, now seen corresponding path program 24 times [2020-12-22 04:51:26,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:26,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863102347] [2020-12-22 04:51:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:26,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863102347] [2020-12-22 04:51:26,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830253022] [2020-12-22 04:51:26,685 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:26,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:51:26,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:26,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:51:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:26,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:26,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-12-22 04:51:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202546267] [2020-12-22 04:51:26,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:51:26,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:51:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:51:26,789 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 27 states. [2020-12-22 04:51:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:26,814 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-22 04:51:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:51:26,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-12-22 04:51:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:26,815 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:51:26,815 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:51:26,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:51:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:51:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 04:51:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:51:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:51:26,819 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-12-22 04:51:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:26,820 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:51:26,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:51:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:51:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:51:26,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:26,821 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:27,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:27,035 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2039089427, now seen corresponding path program 25 times [2020-12-22 04:51:27,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:27,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389160064] [2020-12-22 04:51:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:27,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389160064] [2020-12-22 04:51:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193081793] [2020-12-22 04:51:27,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:27,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:51:27,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:27,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:27,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-12-22 04:51:27,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558318694] [2020-12-22 04:51:27,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:51:27,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:27,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:51:27,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:51:27,499 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 28 states. [2020-12-22 04:51:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:27,545 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:51:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:51:27,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-12-22 04:51:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:27,545 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:51:27,545 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:51:27,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:51:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:51:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 04:51:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:51:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-22 04:51:27,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-12-22 04:51:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:27,552 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-22 04:51:27,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:51:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-22 04:51:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:51:27,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:27,552 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:27,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:51:27,767 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1211071797, now seen corresponding path program 26 times [2020-12-22 04:51:27,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:27,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243631978] [2020-12-22 04:51:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:28,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243631978] [2020-12-22 04:51:28,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774907801] [2020-12-22 04:51:28,138 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:28,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:28,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:51:28,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:28,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:28,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-12-22 04:51:28,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488634294] [2020-12-22 04:51:28,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:51:28,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:51:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:51:28,242 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 29 states. [2020-12-22 04:51:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:28,285 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-22 04:51:28,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:51:28,286 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-12-22 04:51:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:28,286 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:51:28,286 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:51:28,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:51:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:51:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 04:51:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:51:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:51:28,290 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-12-22 04:51:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:28,290 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:51:28,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:51:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:51:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:51:28,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:28,291 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:28,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:51:28,498 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1113145363, now seen corresponding path program 27 times [2020-12-22 04:51:28,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:28,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348407338] [2020-12-22 04:51:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:28,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348407338] [2020-12-22 04:51:28,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61961405] [2020-12-22 04:51:28,924 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:28,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 04:51:28,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:51:28,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:29,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:29,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-12-22 04:51:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471985730] [2020-12-22 04:51:29,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:51:29,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:51:29,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:51:29,041 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 30 states. [2020-12-22 04:51:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:29,087 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:51:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:51:29,088 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-12-22 04:51:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:29,088 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:51:29,088 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:51:29,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:51:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:51:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 04:51:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:51:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-22 04:51:29,092 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-12-22 04:51:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:29,093 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-22 04:51:29,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:51:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-22 04:51:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:51:29,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:29,093 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:29,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:51:29,307 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:29,307 INFO L82 PathProgramCache]: Analyzing trace with hash 149433291, now seen corresponding path program 28 times [2020-12-22 04:51:29,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:29,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804673847] [2020-12-22 04:51:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:29,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804673847] [2020-12-22 04:51:29,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408253549] [2020-12-22 04:51:29,773 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:29,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:51:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:29,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:29,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-12-22 04:51:29,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475789891] [2020-12-22 04:51:29,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:51:29,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:29,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:51:29,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:51:29,898 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 31 states. [2020-12-22 04:51:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:29,951 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-22 04:51:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:51:29,952 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-12-22 04:51:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:29,952 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:51:29,952 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:51:29,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:51:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:51:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 04:51:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:51:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:51:29,956 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-12-22 04:51:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:29,957 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:51:29,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:51:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:51:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:51:29,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:29,958 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:30,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:30,171 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash 339130131, now seen corresponding path program 29 times [2020-12-22 04:51:30,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:30,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006351039] [2020-12-22 04:51:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:30,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006351039] [2020-12-22 04:51:30,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347420878] [2020-12-22 04:51:30,639 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:30,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 04:51:30,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:30,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:51:30,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:30,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:30,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-12-22 04:51:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191592355] [2020-12-22 04:51:30,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:51:30,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:51:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:51:30,777 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 32 states. [2020-12-22 04:51:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:30,805 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:51:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:51:30,805 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-12-22 04:51:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:30,806 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:51:30,806 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:51:30,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:51:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:51:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 04:51:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:51:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-22 04:51:30,809 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-12-22 04:51:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:30,810 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-22 04:51:30,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:51:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-22 04:51:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:51:30,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:30,810 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:31,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:51:31,026 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1924764875, now seen corresponding path program 30 times [2020-12-22 04:51:31,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:31,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131657078] [2020-12-22 04:51:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:31,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131657078] [2020-12-22 04:51:31,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072490388] [2020-12-22 04:51:31,515 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:31,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 04:51:31,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:31,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:51:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:31,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:31,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-12-22 04:51:31,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627988548] [2020-12-22 04:51:31,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:51:31,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:51:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:51:31,630 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 33 states. [2020-12-22 04:51:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:31,678 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-22 04:51:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:51:31,679 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-12-22 04:51:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:31,679 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:51:31,679 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:51:31,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:51:31,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:51:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 04:51:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:51:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:51:31,683 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-12-22 04:51:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:31,684 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:51:31,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:51:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:51:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:51:31,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:31,684 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:31,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:31,898 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash -460165613, now seen corresponding path program 31 times [2020-12-22 04:51:31,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:31,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130633589] [2020-12-22 04:51:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:32,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130633589] [2020-12-22 04:51:32,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269306249] [2020-12-22 04:51:32,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:51:32,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:32,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:32,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-12-22 04:51:32,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641525734] [2020-12-22 04:51:32,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:51:32,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:32,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:51:32,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:51:32,612 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 34 states. [2020-12-22 04:51:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:32,674 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:51:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:51:32,674 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-12-22 04:51:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:32,675 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:51:32,675 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:51:32,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:51:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:51:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:51:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:51:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-22 04:51:32,679 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-12-22 04:51:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:32,680 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-22 04:51:32,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:51:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-22 04:51:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:51:32,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:32,680 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:32,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:51:32,896 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:32,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:32,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1378566709, now seen corresponding path program 32 times [2020-12-22 04:51:32,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:32,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591516720] [2020-12-22 04:51:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:33,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591516720] [2020-12-22 04:51:33,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773654942] [2020-12-22 04:51:33,435 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:33,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:33,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:51:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:33,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:33,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-12-22 04:51:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066587085] [2020-12-22 04:51:33,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:51:33,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:51:33,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:51:33,560 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 35 states. [2020-12-22 04:51:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:33,617 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-22 04:51:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:51:33,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-12-22 04:51:33,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:33,618 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:51:33,618 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:51:33,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:51:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:51:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 04:51:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:51:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:51:33,622 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-12-22 04:51:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:33,622 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:51:33,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:51:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:51:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:51:33,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:33,623 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:33,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:51:33,836 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 215770387, now seen corresponding path program 33 times [2020-12-22 04:51:33,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:33,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774740906] [2020-12-22 04:51:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:34,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774740906] [2020-12-22 04:51:34,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540984458] [2020-12-22 04:51:34,411 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:34,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:51:34,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:51:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:34,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:34,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-12-22 04:51:34,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608148968] [2020-12-22 04:51:34,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:51:34,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:34,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:51:34,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:51:34,540 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 36 states. [2020-12-22 04:51:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:34,585 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:51:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:51:34,586 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-12-22 04:51:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:34,586 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:51:34,586 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:51:34,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:51:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:51:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 04:51:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:51:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-22 04:51:34,590 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-12-22 04:51:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:34,591 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-22 04:51:34,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:51:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-22 04:51:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:51:34,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:34,591 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:34,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:51:34,806 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1899387189, now seen corresponding path program 34 times [2020-12-22 04:51:34,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:34,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109371383] [2020-12-22 04:51:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109371383] [2020-12-22 04:51:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258747241] [2020-12-22 04:51:35,446 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:35,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:35,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:51:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:35,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:35,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2020-12-22 04:51:35,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484381696] [2020-12-22 04:51:35,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:51:35,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:51:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:51:35,557 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 37 states. [2020-12-22 04:51:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:35,596 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-22 04:51:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:51:35,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-12-22 04:51:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:35,597 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:51:35,597 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:51:35,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:51:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:51:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 04:51:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:51:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:51:35,600 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-12-22 04:51:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:35,600 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:51:35,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:51:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:51:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:35,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:35,601 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:35,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:51:35,816 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1250204691, now seen corresponding path program 35 times [2020-12-22 04:51:35,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:35,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919474323] [2020-12-22 04:51:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919474323] [2020-12-22 04:51:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978367024] [2020-12-22 04:51:36,472 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:36,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 04:51:36,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:51:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:36,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:36,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-12-22 04:51:36,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628111891] [2020-12-22 04:51:36,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:51:36,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:36,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:51:36,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:51:36,598 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 38 states. [2020-12-22 04:51:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:36,636 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:51:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:51:36,637 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-12-22 04:51:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:36,637 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:51:36,638 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:51:36,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:51:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:51:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 04:51:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:51:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-22 04:51:36,641 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-12-22 04:51:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:36,641 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-22 04:51:36,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:51:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-22 04:51:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:51:36,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:36,642 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:36,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:51:36,856 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 103305163, now seen corresponding path program 36 times [2020-12-22 04:51:36,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:36,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693485011] [2020-12-22 04:51:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:37,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693485011] [2020-12-22 04:51:37,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242547018] [2020-12-22 04:51:37,540 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:37,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:51:37,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:51:37,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:37,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:37,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2020-12-22 04:51:37,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20835174] [2020-12-22 04:51:37,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:51:37,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:37,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:51:37,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:51:37,674 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 39 states. [2020-12-22 04:51:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:37,721 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-22 04:51:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:51:37,721 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-12-22 04:51:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:37,722 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:51:37,722 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:51:37,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:51:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:51:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 04:51:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:51:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:51:37,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-12-22 04:51:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:37,725 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:51:37,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:51:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:51:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:51:37,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:37,726 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:37,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:51:37,940 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1090841837, now seen corresponding path program 37 times [2020-12-22 04:51:37,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:37,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599304778] [2020-12-22 04:51:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:38,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599304778] [2020-12-22 04:51:38,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251140372] [2020-12-22 04:51:38,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:38,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:51:38,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:38,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:38,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-12-22 04:51:38,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10421665] [2020-12-22 04:51:38,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:51:38,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:51:38,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:51:38,821 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 40 states. [2020-12-22 04:51:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:38,881 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:51:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:51:38,882 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-12-22 04:51:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:38,882 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:51:38,882 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:51:38,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:51:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:51:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 04:51:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:51:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-22 04:51:38,885 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-12-22 04:51:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:38,886 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-22 04:51:38,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:51:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-22 04:51:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:51:38,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:38,887 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:39,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:51:39,101 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:39,102 INFO L82 PathProgramCache]: Analyzing trace with hash 545306827, now seen corresponding path program 38 times [2020-12-22 04:51:39,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:39,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860384031] [2020-12-22 04:51:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:39,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860384031] [2020-12-22 04:51:39,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354667258] [2020-12-22 04:51:39,858 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:39,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:39,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:39,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:51:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:39,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:39,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2020-12-22 04:51:39,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441498342] [2020-12-22 04:51:39,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:51:39,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:39,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:51:39,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:51:39,981 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 41 states. [2020-12-22 04:51:40,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:40,046 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-22 04:51:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:51:40,047 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-12-22 04:51:40,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:40,047 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:51:40,047 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:51:40,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:51:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:51:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 04:51:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:51:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:51:40,050 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-12-22 04:51:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:40,051 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:51:40,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:51:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:51:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:51:40,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:40,051 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:40,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:51:40,267 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:40,267 INFO L82 PathProgramCache]: Analyzing trace with hash -273692141, now seen corresponding path program 39 times [2020-12-22 04:51:40,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:40,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383661236] [2020-12-22 04:51:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:41,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383661236] [2020-12-22 04:51:41,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275057104] [2020-12-22 04:51:41,044 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:41,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 04:51:41,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:51:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:41,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:41,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2020-12-22 04:51:41,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963297828] [2020-12-22 04:51:41,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:51:41,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:41,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:51:41,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:51:41,184 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 42 states. [2020-12-22 04:51:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:41,240 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:51:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:51:41,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-12-22 04:51:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:41,241 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:51:41,241 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:51:41,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:51:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:51:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:51:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:51:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-22 04:51:41,245 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-12-22 04:51:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:41,245 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-22 04:51:41,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:51:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-22 04:51:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:51:41,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:41,246 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:41,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:41,460 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:41,461 INFO L82 PathProgramCache]: Analyzing trace with hash 107143627, now seen corresponding path program 40 times [2020-12-22 04:51:41,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:41,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363955305] [2020-12-22 04:51:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:42,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363955305] [2020-12-22 04:51:42,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375860953] [2020-12-22 04:51:42,270 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:42,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:42,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:51:42,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:42,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:42,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2020-12-22 04:51:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155044618] [2020-12-22 04:51:42,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:51:42,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:51:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:51:42,394 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 43 states. [2020-12-22 04:51:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:42,436 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-22 04:51:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:51:42,436 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-12-22 04:51:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:42,437 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:51:42,437 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:51:42,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:51:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:51:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-22 04:51:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:51:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:51:42,440 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-12-22 04:51:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:42,441 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:51:42,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:51:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:51:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:51:42,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:42,442 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:42,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:42,656 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash -971849453, now seen corresponding path program 41 times [2020-12-22 04:51:42,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:42,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714677504] [2020-12-22 04:51:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:43,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714677504] [2020-12-22 04:51:43,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77920349] [2020-12-22 04:51:43,500 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:43,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-22 04:51:43,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:51:43,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:43,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:43,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2020-12-22 04:51:43,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072933692] [2020-12-22 04:51:43,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:51:43,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:43,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:51:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:51:43,636 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 44 states. [2020-12-22 04:51:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:43,719 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:51:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:51:43,720 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-12-22 04:51:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:43,721 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:51:43,721 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:51:43,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:51:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:51:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 04:51:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:51:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-22 04:51:43,724 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-12-22 04:51:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:43,725 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-22 04:51:43,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:51:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-22 04:51:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:51:43,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:43,726 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:43,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 04:51:43,940 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash -60896565, now seen corresponding path program 42 times [2020-12-22 04:51:43,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:43,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16866487] [2020-12-22 04:51:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:44,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16866487] [2020-12-22 04:51:44,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874457728] [2020-12-22 04:51:44,845 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:44,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-22 04:51:44,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:51:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:44,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:44,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2020-12-22 04:51:44,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579172297] [2020-12-22 04:51:44,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:51:44,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:44,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:51:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:51:44,984 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 45 states. [2020-12-22 04:51:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:45,082 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-12-22 04:51:45,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:51:45,082 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 49 [2020-12-22 04:51:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:45,084 INFO L225 Difference]: With dead ends: 55 [2020-12-22 04:51:45,084 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:51:45,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:51:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:51:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 04:51:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:51:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:51:45,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-12-22 04:51:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:45,090 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:51:45,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:51:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:51:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:51:45,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:45,091 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:45,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:45,305 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:45,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1886128109, now seen corresponding path program 43 times [2020-12-22 04:51:45,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:45,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846037274] [2020-12-22 04:51:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:46,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846037274] [2020-12-22 04:51:46,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196809560] [2020-12-22 04:51:46,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:51:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:46,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:46,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2020-12-22 04:51:46,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223839964] [2020-12-22 04:51:46,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:51:46,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:46,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:51:46,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:51:46,387 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 46 states. [2020-12-22 04:51:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:46,467 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:51:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:51:46,467 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 50 [2020-12-22 04:51:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:46,468 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:51:46,468 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:51:46,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:51:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:51:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 04:51:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:51:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-22 04:51:46,471 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-12-22 04:51:46,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:46,471 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-22 04:51:46,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:51:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-22 04:51:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:51:46,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:46,472 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:46,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:46,686 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1661236171, now seen corresponding path program 44 times [2020-12-22 04:51:46,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:46,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374413829] [2020-12-22 04:51:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:47,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374413829] [2020-12-22 04:51:47,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605570131] [2020-12-22 04:51:47,615 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:47,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:47,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:47,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:51:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:47,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:47,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2020-12-22 04:51:47,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775818520] [2020-12-22 04:51:47,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:51:47,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:51:47,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:51:47,745 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 47 states. [2020-12-22 04:51:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:47,835 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-12-22 04:51:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:51:47,836 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 51 [2020-12-22 04:51:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:47,837 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:51:47,837 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:51:47,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:51:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:51:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 04:51:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:51:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:51:47,840 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-12-22 04:51:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:47,841 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:51:47,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:51:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:51:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:51:47,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:47,841 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:48,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:51:48,057 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -39620845, now seen corresponding path program 45 times [2020-12-22 04:51:48,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:48,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146915307] [2020-12-22 04:51:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:49,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146915307] [2020-12-22 04:51:49,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019256768] [2020-12-22 04:51:49,141 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:49,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-22 04:51:49,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:49,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:51:49,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:49,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:49,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2020-12-22 04:51:49,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889335302] [2020-12-22 04:51:49,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:51:49,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:51:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:51:49,309 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 48 states. [2020-12-22 04:51:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:49,361 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:51:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:51:49,361 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2020-12-22 04:51:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:49,362 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:51:49,362 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:51:49,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:51:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:51:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 04:51:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:51:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-22 04:51:49,365 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-12-22 04:51:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:49,366 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-22 04:51:49,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:51:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-22 04:51:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:51:49,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:49,367 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:49,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:51:49,582 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1226580789, now seen corresponding path program 46 times [2020-12-22 04:51:49,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:49,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970343190] [2020-12-22 04:51:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:50,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970343190] [2020-12-22 04:51:50,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912077586] [2020-12-22 04:51:50,644 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:50,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:50,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:50,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:51:50,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:50,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:50,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2020-12-22 04:51:50,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331169003] [2020-12-22 04:51:50,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:51:50,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:51:50,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:51:50,775 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 49 states. [2020-12-22 04:51:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:50,838 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-22 04:51:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:51:50,838 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 53 [2020-12-22 04:51:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:50,839 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:51:50,839 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:51:50,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:51:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:51:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 04:51:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:51:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:51:50,842 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-12-22 04:51:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:50,842 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:51:50,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:51:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:51:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:51:50,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:50,843 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:51,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:51:51,058 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:51,058 INFO L82 PathProgramCache]: Analyzing trace with hash 632366611, now seen corresponding path program 47 times [2020-12-22 04:51:51,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:51,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133992488] [2020-12-22 04:51:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:52,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133992488] [2020-12-22 04:51:52,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693878094] [2020-12-22 04:51:52,170 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:52,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:51:52,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:51:52,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:52,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:52,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2020-12-22 04:51:52,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150197867] [2020-12-22 04:51:52,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:51:52,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:52,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:51:52,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:51:52,316 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 50 states. [2020-12-22 04:51:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:52,408 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:51:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:51:52,408 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 54 [2020-12-22 04:51:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:52,409 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:51:52,409 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:51:52,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:51:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:51:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 04:51:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:51:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-22 04:51:52,412 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-12-22 04:51:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:52,413 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-22 04:51:52,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:51:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-22 04:51:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:51:52,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:52,414 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:52,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:52,627 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1869806133, now seen corresponding path program 48 times [2020-12-22 04:51:52,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:52,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429804497] [2020-12-22 04:51:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:53,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429804497] [2020-12-22 04:51:53,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845104261] [2020-12-22 04:51:53,806 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:53,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:51:53,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:53,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:51:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:53,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:53,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2020-12-22 04:51:53,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612241897] [2020-12-22 04:51:53,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:51:53,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:51:53,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:51:53,968 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 51 states. [2020-12-22 04:51:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:54,061 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-12-22 04:51:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:51:54,062 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 55 [2020-12-22 04:51:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:54,062 INFO L225 Difference]: With dead ends: 61 [2020-12-22 04:51:54,062 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:51:54,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:51:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:51:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 04:51:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:51:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-22 04:51:54,066 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-12-22 04:51:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:54,066 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-22 04:51:54,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:51:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-22 04:51:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:51:54,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:54,067 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:54,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:51:54,271 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2127749869, now seen corresponding path program 49 times [2020-12-22 04:51:54,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:54,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193247764] [2020-12-22 04:51:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:55,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193247764] [2020-12-22 04:51:55,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113384876] [2020-12-22 04:51:55,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:55,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:51:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:55,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:55,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2020-12-22 04:51:55,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802213423] [2020-12-22 04:51:55,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:51:55,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:55,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:51:55,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:51:55,644 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 52 states. [2020-12-22 04:51:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:55,703 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:51:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:51:55,704 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 56 [2020-12-22 04:51:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:55,705 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:51:55,705 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:51:55,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:51:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:51:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 04:51:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 04:51:55,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-12-22 04:51:55,709 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-12-22 04:51:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:55,709 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-12-22 04:51:55,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:51:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-12-22 04:51:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 04:51:55,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:55,711 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:55,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:55,925 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1534071093, now seen corresponding path program 50 times [2020-12-22 04:51:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:55,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055310334] [2020-12-22 04:51:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:57,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055310334] [2020-12-22 04:51:57,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171474921] [2020-12-22 04:51:57,268 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:57,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:57,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:57,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:51:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:57,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:57,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2020-12-22 04:51:57,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995909697] [2020-12-22 04:51:57,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:51:57,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:51:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:51:57,411 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 53 states. [2020-12-22 04:51:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:57,507 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-12-22 04:51:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:51:57,507 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 57 [2020-12-22 04:51:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:57,508 INFO L225 Difference]: With dead ends: 63 [2020-12-22 04:51:57,508 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:51:57,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:51:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:51:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 04:51:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:51:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 04:51:57,511 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-12-22 04:51:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:57,511 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 04:51:57,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:51:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 04:51:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:51:57,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:57,512 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:57,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:57,727 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:57,728 INFO L82 PathProgramCache]: Analyzing trace with hash -309898221, now seen corresponding path program 51 times [2020-12-22 04:51:57,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:57,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671036243] [2020-12-22 04:51:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:59,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671036243] [2020-12-22 04:51:59,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750609901] [2020-12-22 04:51:59,059 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:59,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-12-22 04:51:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:59,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:51:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:59,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:59,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2020-12-22 04:51:59,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504726749] [2020-12-22 04:51:59,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:51:59,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:51:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:51:59,219 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 54 states. [2020-12-22 04:51:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:59,279 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:51:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:51:59,279 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 58 [2020-12-22 04:51:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:59,280 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:51:59,280 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:51:59,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:51:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:51:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-22 04:51:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 04:51:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-12-22 04:51:59,283 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-12-22 04:51:59,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:59,283 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-12-22 04:51:59,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:51:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-12-22 04:51:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 04:51:59,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:59,284 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:59,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 04:51:59,498 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1015244853, now seen corresponding path program 52 times [2020-12-22 04:51:59,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:59,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686913055] [2020-12-22 04:51:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:00,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686913055] [2020-12-22 04:52:00,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490969188] [2020-12-22 04:52:00,951 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:01,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:52:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:52:01,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:01,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:01,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2020-12-22 04:52:01,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101439588] [2020-12-22 04:52:01,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:52:01,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:01,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:52:01,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:52:01,106 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 55 states. [2020-12-22 04:52:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:01,213 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-12-22 04:52:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 04:52:01,214 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 59 [2020-12-22 04:52:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:01,214 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:52:01,215 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:52:01,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:52:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:52:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-22 04:52:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:52:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-22 04:52:01,217 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-12-22 04:52:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:01,218 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-22 04:52:01,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:52:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-22 04:52:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:52:01,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:01,219 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:01,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:01,432 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:01,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1406153965, now seen corresponding path program 53 times [2020-12-22 04:52:01,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:01,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356985230] [2020-12-22 04:52:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:02,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356985230] [2020-12-22 04:52:02,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715967420] [2020-12-22 04:52:02,874 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:02,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-22 04:52:02,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:52:02,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:03,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:03,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2020-12-22 04:52:03,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151795621] [2020-12-22 04:52:03,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:52:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:52:03,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:52:03,039 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 56 states. [2020-12-22 04:52:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:03,122 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:52:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 04:52:03,122 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 60 [2020-12-22 04:52:03,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:03,123 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:52:03,123 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:52:03,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:52:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:52:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 04:52:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:52:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-22 04:52:03,126 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-12-22 04:52:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:03,127 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-22 04:52:03,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:52:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-22 04:52:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 04:52:03,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:03,128 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:03,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 04:52:03,341 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash -639434549, now seen corresponding path program 54 times [2020-12-22 04:52:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:03,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48522320] [2020-12-22 04:52:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:04,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48522320] [2020-12-22 04:52:04,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335136787] [2020-12-22 04:52:04,855 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:04,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-12-22 04:52:04,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 04:52:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:05,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:05,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2020-12-22 04:52:05,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014773248] [2020-12-22 04:52:05,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:52:05,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:05,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:52:05,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:52:05,026 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 57 states. [2020-12-22 04:52:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:05,160 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-12-22 04:52:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 04:52:05,161 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 61 [2020-12-22 04:52:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:05,162 INFO L225 Difference]: With dead ends: 67 [2020-12-22 04:52:05,162 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 04:52:05,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:52:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 04:52:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 04:52:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:52:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-22 04:52:05,165 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-12-22 04:52:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:05,166 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-22 04:52:05,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 04:52:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-22 04:52:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:52:05,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:05,167 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:05,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 04:52:05,380 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1654030867, now seen corresponding path program 55 times [2020-12-22 04:52:05,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:05,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144787556] [2020-12-22 04:52:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:06,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144787556] [2020-12-22 04:52:06,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676770131] [2020-12-22 04:52:06,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:06,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:52:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:07,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:07,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2020-12-22 04:52:07,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780887324] [2020-12-22 04:52:07,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 04:52:07,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:07,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 04:52:07,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:52:07,072 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 58 states. [2020-12-22 04:52:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:07,189 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:52:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 04:52:07,190 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 62 [2020-12-22 04:52:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:07,191 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:52:07,191 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:52:07,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:52:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:52:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 04:52:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:52:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-12-22 04:52:07,194 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-12-22 04:52:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:07,195 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-12-22 04:52:07,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 04:52:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-12-22 04:52:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 04:52:07,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:07,196 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:07,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:07,409 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:07,410 INFO L82 PathProgramCache]: Analyzing trace with hash -262985269, now seen corresponding path program 56 times [2020-12-22 04:52:07,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:07,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785777409] [2020-12-22 04:52:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:09,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785777409] [2020-12-22 04:52:09,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352107572] [2020-12-22 04:52:09,033 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:09,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:52:09,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:09,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:52:09,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:09,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:09,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2020-12-22 04:52:09,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598259640] [2020-12-22 04:52:09,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:52:09,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:52:09,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:52:09,192 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 59 states. [2020-12-22 04:52:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:09,325 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-12-22 04:52:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 04:52:09,328 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 63 [2020-12-22 04:52:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:09,329 INFO L225 Difference]: With dead ends: 69 [2020-12-22 04:52:09,329 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:52:09,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:52:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:52:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-22 04:52:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:52:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-22 04:52:09,333 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-12-22 04:52:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:09,333 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-22 04:52:09,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:52:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-22 04:52:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:52:09,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:09,334 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:09,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 04:52:09,549 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash 439056659, now seen corresponding path program 57 times [2020-12-22 04:52:09,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:09,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084663220] [2020-12-22 04:52:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:11,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084663220] [2020-12-22 04:52:11,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667082496] [2020-12-22 04:52:11,237 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:11,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-22 04:52:11,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:11,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:52:11,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:11,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:11,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2020-12-22 04:52:11,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548522802] [2020-12-22 04:52:11,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:52:11,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:11,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:52:11,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:52:11,424 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 60 states. [2020-12-22 04:52:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:11,532 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:52:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 04:52:11,533 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 64 [2020-12-22 04:52:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:11,534 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:52:11,534 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:52:11,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:52:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:52:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 04:52:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:52:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-12-22 04:52:11,538 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-12-22 04:52:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:11,539 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-12-22 04:52:11,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:52:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-12-22 04:52:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 04:52:11,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:11,540 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:11,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:11,754 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:11,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:11,754 INFO L82 PathProgramCache]: Analyzing trace with hash 727519947, now seen corresponding path program 58 times [2020-12-22 04:52:11,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:11,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678555260] [2020-12-22 04:52:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:13,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678555260] [2020-12-22 04:52:13,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552783840] [2020-12-22 04:52:13,481 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:13,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:52:13,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 04:52:13,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:13,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:13,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-22 04:52:13,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776708406] [2020-12-22 04:52:13,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 04:52:13,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:13,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 04:52:13,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:52:13,636 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 61 states. [2020-12-22 04:52:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:13,739 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-12-22 04:52:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 04:52:13,740 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 65 [2020-12-22 04:52:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:13,741 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:52:13,741 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 04:52:13,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:52:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 04:52:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-22 04:52:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:52:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 04:52:13,746 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-12-22 04:52:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:13,746 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 04:52:13,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 04:52:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 04:52:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:52:13,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:13,747 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:13,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 04:52:13,960 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1079947283, now seen corresponding path program 59 times [2020-12-22 04:52:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:13,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929589774] [2020-12-22 04:52:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:15,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929589774] [2020-12-22 04:52:15,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922108910] [2020-12-22 04:52:15,767 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:15,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-22 04:52:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:52:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:15,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:15,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2020-12-22 04:52:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749937864] [2020-12-22 04:52:15,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 04:52:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 04:52:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:52:15,927 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 62 states. [2020-12-22 04:52:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:16,050 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-22 04:52:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:52:16,051 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 66 [2020-12-22 04:52:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:16,052 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:52:16,052 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:52:16,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:52:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:52:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-22 04:52:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 04:52:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-12-22 04:52:16,055 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2020-12-22 04:52:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:16,055 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-12-22 04:52:16,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 04:52:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-12-22 04:52:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 04:52:16,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:16,056 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:16,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:16,273 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:16,273 INFO L82 PathProgramCache]: Analyzing trace with hash -879707189, now seen corresponding path program 60 times [2020-12-22 04:52:16,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:16,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644627191] [2020-12-22 04:52:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:18,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644627191] [2020-12-22 04:52:18,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155792707] [2020-12-22 04:52:18,164 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:18,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:52:18,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:18,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:52:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:18,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:18,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2020-12-22 04:52:18,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339398886] [2020-12-22 04:52:18,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:52:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:52:18,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:52:18,347 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 63 states. [2020-12-22 04:52:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:18,460 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-12-22 04:52:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 04:52:18,461 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 67 [2020-12-22 04:52:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:18,461 INFO L225 Difference]: With dead ends: 73 [2020-12-22 04:52:18,461 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 04:52:18,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:52:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 04:52:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-22 04:52:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:52:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-22 04:52:18,468 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2020-12-22 04:52:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:18,468 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-22 04:52:18,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:52:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-22 04:52:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:52:18,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:18,469 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:18,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-22 04:52:18,684 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:18,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1499453677, now seen corresponding path program 61 times [2020-12-22 04:52:18,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:18,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879870662] [2020-12-22 04:52:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:20,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879870662] [2020-12-22 04:52:20,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307822817] [2020-12-22 04:52:20,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:20,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 04:52:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:20,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:20,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2020-12-22 04:52:20,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220050010] [2020-12-22 04:52:20,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 04:52:20,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:20,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 04:52:20,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:52:20,878 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 64 states. [2020-12-22 04:52:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:21,011 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-22 04:52:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 04:52:21,011 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 68 [2020-12-22 04:52:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:21,012 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:52:21,012 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:52:21,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:52:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:52:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-22 04:52:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:52:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-12-22 04:52:21,016 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2020-12-22 04:52:21,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:21,019 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-12-22 04:52:21,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 04:52:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-12-22 04:52:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 04:52:21,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:21,020 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:21,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:21,233 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 763241675, now seen corresponding path program 62 times [2020-12-22 04:52:21,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:21,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517517975] [2020-12-22 04:52:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:23,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517517975] [2020-12-22 04:52:23,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829058237] [2020-12-22 04:52:23,315 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:23,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:52:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 04:52:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:23,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:23,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2020-12-22 04:52:23,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125601060] [2020-12-22 04:52:23,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 04:52:23,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 04:52:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:52:23,487 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 65 states. [2020-12-22 04:52:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:23,616 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-12-22 04:52:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 04:52:23,617 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 69 [2020-12-22 04:52:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:23,618 INFO L225 Difference]: With dead ends: 75 [2020-12-22 04:52:23,618 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:52:23,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:52:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:52:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-22 04:52:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:52:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-22 04:52:23,622 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2020-12-22 04:52:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:23,622 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-22 04:52:23,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 04:52:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-22 04:52:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:52:23,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:23,623 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:23,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-22 04:52:23,833 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:23,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2107646445, now seen corresponding path program 63 times [2020-12-22 04:52:23,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:23,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355944574] [2020-12-22 04:52:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355944574] [2020-12-22 04:52:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327755881] [2020-12-22 04:52:25,903 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:26,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2020-12-22 04:52:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:26,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:52:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:26,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:26,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2020-12-22 04:52:26,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246939009] [2020-12-22 04:52:26,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 04:52:26,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:26,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 04:52:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:52:26,099 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 66 states. [2020-12-22 04:52:26,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:26,259 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-22 04:52:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 04:52:26,259 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 70 [2020-12-22 04:52:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:26,260 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:52:26,260 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:52:26,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:52:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:52:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 04:52:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:52:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-12-22 04:52:26,264 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2020-12-22 04:52:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:26,264 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-12-22 04:52:26,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 04:52:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-12-22 04:52:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:52:26,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:26,265 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:26,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:26,479 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash -910864949, now seen corresponding path program 64 times [2020-12-22 04:52:26,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:26,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140407368] [2020-12-22 04:52:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:28,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140407368] [2020-12-22 04:52:28,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039685672] [2020-12-22 04:52:28,627 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:28,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:52:28,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:28,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:52:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:28,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:28,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2020-12-22 04:52:28,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337394316] [2020-12-22 04:52:28,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 04:52:28,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:28,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 04:52:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:52:28,793 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 67 states. [2020-12-22 04:52:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:28,902 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-12-22 04:52:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 04:52:28,903 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 71 [2020-12-22 04:52:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:28,904 INFO L225 Difference]: With dead ends: 77 [2020-12-22 04:52:28,904 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 04:52:28,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:52:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 04:52:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-22 04:52:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:52:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-22 04:52:28,908 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2020-12-22 04:52:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:28,908 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-22 04:52:28,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 04:52:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-22 04:52:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:52:28,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:28,909 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:29,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 04:52:29,123 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:29,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1829623059, now seen corresponding path program 65 times [2020-12-22 04:52:29,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:29,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262985888] [2020-12-22 04:52:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:31,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262985888] [2020-12-22 04:52:31,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730178418] [2020-12-22 04:52:31,311 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:31,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-22 04:52:31,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:31,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:52:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:31,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:31,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2020-12-22 04:52:31,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625032673] [2020-12-22 04:52:31,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 04:52:31,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:31,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 04:52:31,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:52:31,489 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 68 states. [2020-12-22 04:52:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:31,639 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 04:52:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 04:52:31,640 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 72 [2020-12-22 04:52:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:31,641 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:52:31,641 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:52:31,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:52:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:52:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 04:52:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:52:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-12-22 04:52:31,646 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2020-12-22 04:52:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:31,647 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-12-22 04:52:31,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 04:52:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-12-22 04:52:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 04:52:31,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:31,648 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:31,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 04:52:31,861 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash 885405387, now seen corresponding path program 66 times [2020-12-22 04:52:31,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:31,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770307346] [2020-12-22 04:52:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:34,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770307346] [2020-12-22 04:52:34,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612220046] [2020-12-22 04:52:34,179 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:34,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-12-22 04:52:34,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 04:52:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:34,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:34,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2020-12-22 04:52:34,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953616913] [2020-12-22 04:52:34,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 04:52:34,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:34,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 04:52:34,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:52:34,389 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 69 states. [2020-12-22 04:52:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:34,476 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-12-22 04:52:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 04:52:34,477 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 73 [2020-12-22 04:52:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:34,478 INFO L225 Difference]: With dead ends: 79 [2020-12-22 04:52:34,478 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 04:52:34,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:52:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 04:52:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 04:52:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:52:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-22 04:52:34,482 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2020-12-22 04:52:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:34,483 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-22 04:52:34,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 04:52:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-22 04:52:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:52:34,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:34,484 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:34,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-22 04:52:34,692 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:34,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1679428627, now seen corresponding path program 67 times [2020-12-22 04:52:34,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:34,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687727497] [2020-12-22 04:52:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:37,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687727497] [2020-12-22 04:52:37,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871582508] [2020-12-22 04:52:37,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:52:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:37,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:37,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2020-12-22 04:52:37,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584053995] [2020-12-22 04:52:37,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 04:52:37,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:37,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 04:52:37,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:52:37,289 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 70 states. [2020-12-22 04:52:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:37,446 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-22 04:52:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:52:37,446 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 74 [2020-12-22 04:52:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:37,447 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:52:37,447 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:52:37,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:52:37,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:52:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-22 04:52:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 04:52:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-12-22 04:52:37,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2020-12-22 04:52:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:37,451 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-12-22 04:52:37,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 04:52:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-12-22 04:52:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 04:52:37,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:37,451 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:37,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:37,659 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash 524345291, now seen corresponding path program 68 times [2020-12-22 04:52:37,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:37,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193510993] [2020-12-22 04:52:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:40,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193510993] [2020-12-22 04:52:40,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566046210] [2020-12-22 04:52:40,101 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:40,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:52:40,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:52:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:40,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:40,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2020-12-22 04:52:40,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358327397] [2020-12-22 04:52:40,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 04:52:40,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 04:52:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:52:40,295 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 71 states. [2020-12-22 04:52:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:40,397 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-12-22 04:52:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 04:52:40,398 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 75 [2020-12-22 04:52:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:40,399 INFO L225 Difference]: With dead ends: 81 [2020-12-22 04:52:40,399 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 04:52:40,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:52:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 04:52:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-22 04:52:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:52:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-22 04:52:40,403 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2020-12-22 04:52:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:40,403 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-22 04:52:40,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 04:52:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-22 04:52:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:52:40,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:40,404 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:40,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 04:52:40,618 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -923499757, now seen corresponding path program 69 times [2020-12-22 04:52:40,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:40,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099005996] [2020-12-22 04:52:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099005996] [2020-12-22 04:52:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033836867] [2020-12-22 04:52:43,077 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:43,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-12-22 04:52:43,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:52:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:43,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:43,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2020-12-22 04:52:43,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159275922] [2020-12-22 04:52:43,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 04:52:43,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:43,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 04:52:43,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:52:43,277 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 72 states. [2020-12-22 04:52:43,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:43,436 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-22 04:52:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 04:52:43,436 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 76 [2020-12-22 04:52:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:43,437 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:52:43,437 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:52:43,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:52:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:52:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-22 04:52:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:52:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-12-22 04:52:43,441 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2020-12-22 04:52:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:43,441 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-12-22 04:52:43,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 04:52:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-12-22 04:52:43,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 04:52:43,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:43,442 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:43,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:43,656 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1437944011, now seen corresponding path program 70 times [2020-12-22 04:52:43,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:43,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951641671] [2020-12-22 04:52:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:46,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951641671] [2020-12-22 04:52:46,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082504980] [2020-12-22 04:52:46,310 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:46,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:52:46,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:46,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 04:52:46,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:46,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:46,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2020-12-22 04:52:46,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928822481] [2020-12-22 04:52:46,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 04:52:46,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 04:52:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:52:46,478 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 73 states. [2020-12-22 04:52:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:46,633 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-12-22 04:52:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 04:52:46,633 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 77 [2020-12-22 04:52:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:46,634 INFO L225 Difference]: With dead ends: 83 [2020-12-22 04:52:46,634 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 04:52:46,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:52:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 04:52:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-22 04:52:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:52:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-22 04:52:46,639 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2020-12-22 04:52:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:46,640 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-22 04:52:46,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 04:52:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-22 04:52:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:52:46,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:46,640 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:46,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 04:52:46,853 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:46,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1628256787, now seen corresponding path program 71 times [2020-12-22 04:52:46,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:46,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628588734] [2020-12-22 04:52:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:49,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628588734] [2020-12-22 04:52:49,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873111374] [2020-12-22 04:52:49,500 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:49,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-22 04:52:49,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 04:52:49,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:49,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:49,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2020-12-22 04:52:49,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564108895] [2020-12-22 04:52:49,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 04:52:49,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:49,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 04:52:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:52:49,689 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 74 states. [2020-12-22 04:52:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:49,799 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-22 04:52:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 04:52:49,800 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 78 [2020-12-22 04:52:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:49,801 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:52:49,801 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:52:49,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:52:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:52:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-22 04:52:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:52:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-12-22 04:52:49,805 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2020-12-22 04:52:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:49,805 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-12-22 04:52:49,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 04:52:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-12-22 04:52:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 04:52:49,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:49,806 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:50,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:50,007 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1061981749, now seen corresponding path program 72 times [2020-12-22 04:52:50,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:50,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124824980] [2020-12-22 04:52:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:52,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124824980] [2020-12-22 04:52:52,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696227972] [2020-12-22 04:52:52,896 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:53,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:52:53,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 04:52:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:53,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:53,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2020-12-22 04:52:53,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233233480] [2020-12-22 04:52:53,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 04:52:53,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 04:52:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:52:53,117 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 75 states. [2020-12-22 04:52:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:53,234 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-12-22 04:52:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 04:52:53,235 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 79 [2020-12-22 04:52:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:53,236 INFO L225 Difference]: With dead ends: 85 [2020-12-22 04:52:53,236 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 04:52:53,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:52:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 04:52:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-22 04:52:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:52:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-22 04:52:53,240 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2020-12-22 04:52:53,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:53,241 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-22 04:52:53,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 04:52:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-22 04:52:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:52:53,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:53,242 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:53,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:53,456 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1439969555, now seen corresponding path program 73 times [2020-12-22 04:52:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:53,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762782287] [2020-12-22 04:52:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:56,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762782287] [2020-12-22 04:52:56,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466964377] [2020-12-22 04:52:56,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:56,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:52:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:56,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:56,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2020-12-22 04:52:56,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409573391] [2020-12-22 04:52:56,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 04:52:56,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:56,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 04:52:56,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:52:56,608 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 76 states. [2020-12-22 04:52:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:56,787 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-22 04:52:56,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 04:52:56,788 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 80 [2020-12-22 04:52:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:56,789 INFO L225 Difference]: With dead ends: 86 [2020-12-22 04:52:56,789 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:52:56,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:52:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:52:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 04:52:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:52:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-12-22 04:52:56,794 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2020-12-22 04:52:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:56,794 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-12-22 04:52:56,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 04:52:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-12-22 04:52:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 04:52:56,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:56,795 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:57,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:57,011 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1691048651, now seen corresponding path program 74 times [2020-12-22 04:52:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:57,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30889221] [2020-12-22 04:52:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:59,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30889221] [2020-12-22 04:52:59,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351578289] [2020-12-22 04:52:59,954 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:00,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:53:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:00,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:53:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:00,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:00,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2020-12-22 04:53:00,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172641197] [2020-12-22 04:53:00,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 04:53:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:00,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 04:53:00,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:53:00,153 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 77 states. [2020-12-22 04:53:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:00,353 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-12-22 04:53:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 04:53:00,354 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 81 [2020-12-22 04:53:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:00,354 INFO L225 Difference]: With dead ends: 87 [2020-12-22 04:53:00,355 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:53:00,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:53:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:53:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-22 04:53:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:53:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-22 04:53:00,359 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2020-12-22 04:53:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:00,359 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-22 04:53:00,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 04:53:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-22 04:53:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 04:53:00,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:00,360 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:00,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-22 04:53:00,573 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash 884566035, now seen corresponding path program 75 times [2020-12-22 04:53:00,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:00,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817021888] [2020-12-22 04:53:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:03,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817021888] [2020-12-22 04:53:03,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530906160] [2020-12-22 04:53:03,696 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:03,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2020-12-22 04:53:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:53:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:03,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:03,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2020-12-22 04:53:03,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682603708] [2020-12-22 04:53:03,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 04:53:03,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 04:53:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:53:03,936 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 78 states. [2020-12-22 04:53:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:04,125 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-22 04:53:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 04:53:04,126 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 82 [2020-12-22 04:53:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:04,126 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:53:04,126 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 04:53:04,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:53:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 04:53:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-22 04:53:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 04:53:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-12-22 04:53:04,129 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2020-12-22 04:53:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:04,129 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-12-22 04:53:04,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 04:53:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-12-22 04:53:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 04:53:04,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:04,130 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:04,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:04,331 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1653408715, now seen corresponding path program 76 times [2020-12-22 04:53:04,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:04,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002452366] [2020-12-22 04:53:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:07,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002452366] [2020-12-22 04:53:07,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433512054] [2020-12-22 04:53:07,478 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:07,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:53:07,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 04:53:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:07,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:07,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2020-12-22 04:53:07,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323772408] [2020-12-22 04:53:07,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 04:53:07,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:07,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 04:53:07,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 04:53:07,669 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 79 states. [2020-12-22 04:53:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:07,868 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-12-22 04:53:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 04:53:07,868 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 83 [2020-12-22 04:53:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:07,869 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:53:07,869 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 04:53:07,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 04:53:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 04:53:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-22 04:53:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:53:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-22 04:53:07,873 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2020-12-22 04:53:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:07,873 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-22 04:53:07,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 04:53:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-22 04:53:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:53:07,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:07,874 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:08,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:08,089 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash -282271981, now seen corresponding path program 77 times [2020-12-22 04:53:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:08,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410906994] [2020-12-22 04:53:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:11,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410906994] [2020-12-22 04:53:11,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526901943] [2020-12-22 04:53:11,393 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:11,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-22 04:53:11,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:11,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 04:53:11,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:11,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:11,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2020-12-22 04:53:11,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637558126] [2020-12-22 04:53:11,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 04:53:11,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:11,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 04:53:11,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:53:11,592 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 80 states. [2020-12-22 04:53:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:11,714 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-22 04:53:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 04:53:11,715 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 84 [2020-12-22 04:53:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:11,716 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:53:11,716 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:53:11,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:53:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:53:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 04:53:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:53:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-12-22 04:53:11,720 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2020-12-22 04:53:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:11,720 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-12-22 04:53:11,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 04:53:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-12-22 04:53:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 04:53:11,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:11,721 INFO L422 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:11,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 04:53:11,935 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash -158831413, now seen corresponding path program 78 times [2020-12-22 04:53:11,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:11,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990549353] [2020-12-22 04:53:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:15,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990549353] [2020-12-22 04:53:15,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048347836] [2020-12-22 04:53:15,330 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:15,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2020-12-22 04:53:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 04:53:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:15,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:15,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2020-12-22 04:53:15,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868065503] [2020-12-22 04:53:15,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 04:53:15,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 04:53:15,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:53:15,562 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 81 states. [2020-12-22 04:53:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:15,692 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-12-22 04:53:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 04:53:15,693 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 85 [2020-12-22 04:53:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:15,693 INFO L225 Difference]: With dead ends: 91 [2020-12-22 04:53:15,694 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 04:53:15,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:53:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 04:53:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-22 04:53:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:53:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-22 04:53:15,698 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2020-12-22 04:53:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:15,698 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-22 04:53:15,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 04:53:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-22 04:53:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:53:15,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:15,699 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:15,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-22 04:53:15,913 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:15,913 INFO L82 PathProgramCache]: Analyzing trace with hash -627141101, now seen corresponding path program 79 times [2020-12-22 04:53:15,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:15,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977690423] [2020-12-22 04:53:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:19,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977690423] [2020-12-22 04:53:19,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141064222] [2020-12-22 04:53:19,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:19,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 04:53:19,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:19,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:19,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2020-12-22 04:53:19,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849879128] [2020-12-22 04:53:19,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-22 04:53:19,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:19,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-22 04:53:19,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 04:53:19,622 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 82 states. [2020-12-22 04:53:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:19,803 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-22 04:53:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 04:53:19,804 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 86 [2020-12-22 04:53:19,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:19,804 INFO L225 Difference]: With dead ends: 92 [2020-12-22 04:53:19,804 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:53:19,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 04:53:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:53:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 04:53:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 04:53:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-12-22 04:53:19,807 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2020-12-22 04:53:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:19,808 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-12-22 04:53:19,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-22 04:53:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-12-22 04:53:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 04:53:19,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:19,809 INFO L422 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:20,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:20,024 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:20,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2035127755, now seen corresponding path program 80 times [2020-12-22 04:53:20,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:20,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508634615] [2020-12-22 04:53:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:23,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508634615] [2020-12-22 04:53:23,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482352683] [2020-12-22 04:53:23,617 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:23,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:53:23,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:53:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:23,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:23,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2020-12-22 04:53:23,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622219589] [2020-12-22 04:53:23,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-22 04:53:23,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-22 04:53:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 04:53:23,815 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 83 states. [2020-12-22 04:53:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:24,054 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-12-22 04:53:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-22 04:53:24,055 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 87 [2020-12-22 04:53:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:24,056 INFO L225 Difference]: With dead ends: 93 [2020-12-22 04:53:24,056 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 04:53:24,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 04:53:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 04:53:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-22 04:53:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 04:53:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-22 04:53:24,058 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2020-12-22 04:53:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:24,058 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-22 04:53:24,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-22 04:53:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-22 04:53:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:53:24,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:24,059 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:24,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:24,260 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:24,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1333883629, now seen corresponding path program 81 times [2020-12-22 04:53:24,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:24,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277830094] [2020-12-22 04:53:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:27,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277830094] [2020-12-22 04:53:27,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273268307] [2020-12-22 04:53:27,926 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:28,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2020-12-22 04:53:28,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:28,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:53:28,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:28,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:28,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2020-12-22 04:53:28,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193150275] [2020-12-22 04:53:28,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-22 04:53:28,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-22 04:53:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:53:28,174 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 84 states. [2020-12-22 04:53:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:28,317 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-22 04:53:28,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 04:53:28,318 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 88 [2020-12-22 04:53:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:28,319 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:53:28,319 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:53:28,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:53:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:53:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 04:53:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 04:53:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-12-22 04:53:28,323 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2020-12-22 04:53:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:28,323 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-12-22 04:53:28,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-22 04:53:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-12-22 04:53:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 04:53:28,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:28,324 INFO L422 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:28,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:28,525 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:28,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1600945867, now seen corresponding path program 82 times [2020-12-22 04:53:28,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:28,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746777039] [2020-12-22 04:53:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:32,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746777039] [2020-12-22 04:53:32,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400689420] [2020-12-22 04:53:32,344 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:32,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:53:32,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:32,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 04:53:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:32,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:32,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2020-12-22 04:53:32,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944953127] [2020-12-22 04:53:32,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-22 04:53:32,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:32,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-22 04:53:32,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:53:32,541 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 85 states. [2020-12-22 04:53:32,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:32,765 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-12-22 04:53:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 04:53:32,766 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 89 [2020-12-22 04:53:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:32,766 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:53:32,767 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 04:53:32,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:53:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 04:53:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-22 04:53:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:53:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-22 04:53:32,770 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2020-12-22 04:53:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:32,770 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-22 04:53:32,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-22 04:53:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-22 04:53:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 04:53:32,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:32,771 INFO L422 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:32,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:32,979 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1908620269, now seen corresponding path program 83 times [2020-12-22 04:53:32,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:32,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237901489] [2020-12-22 04:53:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:36,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237901489] [2020-12-22 04:53:36,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745049722] [2020-12-22 04:53:36,918 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:37,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-22 04:53:37,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 04:53:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:37,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:37,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2020-12-22 04:53:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86587051] [2020-12-22 04:53:37,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-22 04:53:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-22 04:53:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 04:53:37,159 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 86 states. [2020-12-22 04:53:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:37,313 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-22 04:53:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-22 04:53:37,314 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 90 [2020-12-22 04:53:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:37,314 INFO L225 Difference]: With dead ends: 96 [2020-12-22 04:53:37,314 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 04:53:37,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 04:53:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 04:53:37,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-22 04:53:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 04:53:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-12-22 04:53:37,320 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2020-12-22 04:53:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:37,321 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-12-22 04:53:37,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-22 04:53:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-12-22 04:53:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 04:53:37,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:37,322 INFO L422 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:37,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:37,536 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:37,537 INFO L82 PathProgramCache]: Analyzing trace with hash 963979211, now seen corresponding path program 84 times [2020-12-22 04:53:37,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:37,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909801468] [2020-12-22 04:53:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:41,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909801468] [2020-12-22 04:53:41,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194086860] [2020-12-22 04:53:41,618 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:41,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 04:53:41,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-22 04:53:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:41,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:41,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2020-12-22 04:53:41,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069929791] [2020-12-22 04:53:41,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-22 04:53:41,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-22 04:53:41,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 04:53:41,866 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 87 states. [2020-12-22 04:53:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:42,105 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2020-12-22 04:53:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 04:53:42,107 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 91 [2020-12-22 04:53:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:42,108 INFO L225 Difference]: With dead ends: 97 [2020-12-22 04:53:42,108 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 04:53:42,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 04:53:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 04:53:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-12-22 04:53:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 04:53:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-12-22 04:53:42,111 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2020-12-22 04:53:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:42,112 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-12-22 04:53:42,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-22 04:53:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-12-22 04:53:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:53:42,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:42,113 INFO L422 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:42,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2020-12-22 04:53:42,314 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:42,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:42,314 INFO L82 PathProgramCache]: Analyzing trace with hash -179750125, now seen corresponding path program 85 times [2020-12-22 04:53:42,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:42,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025238242] [2020-12-22 04:53:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:46,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025238242] [2020-12-22 04:53:46,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620457858] [2020-12-22 04:53:46,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 04:53:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:46,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:46,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2020-12-22 04:53:46,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533845404] [2020-12-22 04:53:46,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-22 04:53:46,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:46,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-22 04:53:46,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 04:53:46,705 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 88 states. [2020-12-22 04:53:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:46,865 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-12-22 04:53:46,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 04:53:46,865 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 92 [2020-12-22 04:53:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:46,866 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:53:46,866 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 04:53:46,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 04:53:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 04:53:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-22 04:53:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 04:53:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-12-22 04:53:46,870 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2020-12-22 04:53:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:46,870 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-12-22 04:53:46,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-22 04:53:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-12-22 04:53:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 04:53:46,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:46,871 INFO L422 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:47,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:47,087 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1275621173, now seen corresponding path program 86 times [2020-12-22 04:53:47,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:47,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852683835] [2020-12-22 04:53:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852683835] [2020-12-22 04:53:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745663861] [2020-12-22 04:53:51,392 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:51,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:53:51,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:53:51,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:51,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:51,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2020-12-22 04:53:51,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581646870] [2020-12-22 04:53:51,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-22 04:53:51,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:51,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-22 04:53:51,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 04:53:51,635 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 89 states. [2020-12-22 04:53:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:51,870 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-12-22 04:53:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-22 04:53:51,871 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 93 [2020-12-22 04:53:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:51,871 INFO L225 Difference]: With dead ends: 99 [2020-12-22 04:53:51,871 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 04:53:51,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 04:53:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 04:53:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-22 04:53:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:53:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-12-22 04:53:51,877 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2020-12-22 04:53:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:51,877 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-12-22 04:53:51,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-22 04:53:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-12-22 04:53:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:53:51,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:51,878 INFO L422 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:52,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-22 04:53:52,079 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash -887885293, now seen corresponding path program 87 times [2020-12-22 04:53:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:52,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666861811] [2020-12-22 04:53:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:56,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666861811] [2020-12-22 04:53:56,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193871810] [2020-12-22 04:53:56,518 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:56,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2020-12-22 04:53:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:56,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:53:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:56,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:56,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2020-12-22 04:53:56,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793280487] [2020-12-22 04:53:56,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-22 04:53:56,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:56,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-22 04:53:56,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 04:53:56,815 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 90 states. [2020-12-22 04:53:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:57,067 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-12-22 04:53:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-22 04:53:57,068 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 94 [2020-12-22 04:53:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:57,069 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:53:57,069 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:53:57,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 04:53:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:53:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-22 04:53:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:53:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-12-22 04:53:57,074 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2020-12-22 04:53:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:57,075 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-12-22 04:53:57,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-22 04:53:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-12-22 04:53:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 04:53:57,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:57,075 INFO L422 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:57,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-22 04:53:57,290 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1752974901, now seen corresponding path program 88 times [2020-12-22 04:53:57,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:57,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783891779] [2020-12-22 04:53:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:01,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783891779] [2020-12-22 04:54:01,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632649228] [2020-12-22 04:54:01,994 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:02,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:54:02,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:54:02,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-22 04:54:02,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:02,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:02,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2020-12-22 04:54:02,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689757505] [2020-12-22 04:54:02,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-22 04:54:02,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-22 04:54:02,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 04:54:02,247 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 91 states. [2020-12-22 04:54:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:02,483 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-12-22 04:54:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-22 04:54:02,484 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 95 [2020-12-22 04:54:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:02,485 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:54:02,485 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:54:02,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 04:54:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:54:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-22 04:54:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:54:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-12-22 04:54:02,489 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2020-12-22 04:54:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:02,489 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-12-22 04:54:02,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-22 04:54:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-12-22 04:54:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:54:02,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:02,490 INFO L422 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:02,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:02,703 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:02,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1494018323, now seen corresponding path program 89 times [2020-12-22 04:54:02,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:02,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014631924] [2020-12-22 04:54:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:07,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014631924] [2020-12-22 04:54:07,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071772001] [2020-12-22 04:54:07,475 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:07,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-12-22 04:54:07,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:54:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:54:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:07,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:07,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2020-12-22 04:54:07,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034364627] [2020-12-22 04:54:07,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-22 04:54:07,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:07,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-22 04:54:07,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 04:54:07,737 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 92 states. [2020-12-22 04:54:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:07,922 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-22 04:54:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-22 04:54:07,922 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 96 [2020-12-22 04:54:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:07,923 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:54:07,923 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:54:07,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 04:54:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:54:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-22 04:54:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 04:54:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-12-22 04:54:07,926 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2020-12-22 04:54:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:07,926 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-12-22 04:54:07,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-22 04:54:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-12-22 04:54:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 04:54:07,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:07,927 INFO L422 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:08,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:08,128 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash -928406837, now seen corresponding path program 90 times [2020-12-22 04:54:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:08,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475272929] [2020-12-22 04:54:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:12,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475272929] [2020-12-22 04:54:12,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54248065] [2020-12-22 04:54:12,975 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:13,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2020-12-22 04:54:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:54:13,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-22 04:54:13,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:13,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:13,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2020-12-22 04:54:13,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745508843] [2020-12-22 04:54:13,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-12-22 04:54:13,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:13,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-12-22 04:54:13,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 04:54:13,272 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 93 states. [2020-12-22 04:54:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:13,478 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-12-22 04:54:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-22 04:54:13,478 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 97 [2020-12-22 04:54:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:13,479 INFO L225 Difference]: With dead ends: 103 [2020-12-22 04:54:13,480 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 04:54:13,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 04:54:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 04:54:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-22 04:54:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:54:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-22 04:54:13,484 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2020-12-22 04:54:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:13,485 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-22 04:54:13,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-12-22 04:54:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-22 04:54:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 04:54:13,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:13,485 INFO L422 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:13,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:13,694 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1285824531, now seen corresponding path program 91 times [2020-12-22 04:54:13,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:13,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972005508] [2020-12-22 04:54:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:18,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972005508] [2020-12-22 04:54:18,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672025041] [2020-12-22 04:54:18,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-22 04:54:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:19,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:19,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2020-12-22 04:54:19,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722167091] [2020-12-22 04:54:19,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-22 04:54:19,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:19,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-22 04:54:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 04:54:19,045 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 94 states. [2020-12-22 04:54:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:19,262 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-12-22 04:54:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 04:54:19,263 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 98 [2020-12-22 04:54:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:19,264 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:54:19,264 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 04:54:19,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 04:54:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 04:54:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-22 04:54:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 04:54:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-12-22 04:54:19,268 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2020-12-22 04:54:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:19,268 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-12-22 04:54:19,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-22 04:54:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-12-22 04:54:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 04:54:19,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:19,269 INFO L422 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:19,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2020-12-22 04:54:19,482 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1207520203, now seen corresponding path program 92 times [2020-12-22 04:54:19,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:19,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256411013] [2020-12-22 04:54:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:24,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256411013] [2020-12-22 04:54:24,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872560580] [2020-12-22 04:54:24,642 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:24,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:54:24,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:54:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 04:54:24,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:24,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:24,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2020-12-22 04:54:24,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702384172] [2020-12-22 04:54:24,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-12-22 04:54:24,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:24,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-12-22 04:54:24,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-12-22 04:54:24,883 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 95 states. [2020-12-22 04:54:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:25,075 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-12-22 04:54:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-12-22 04:54:25,076 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 99 [2020-12-22 04:54:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:25,076 INFO L225 Difference]: With dead ends: 105 [2020-12-22 04:54:25,076 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 04:54:25,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-12-22 04:54:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 04:54:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-12-22 04:54:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 04:54:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-12-22 04:54:25,080 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2020-12-22 04:54:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:25,080 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-12-22 04:54:25,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-12-22 04:54:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-12-22 04:54:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 04:54:25,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:25,081 INFO L422 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:25,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:25,281 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1219913965, now seen corresponding path program 93 times [2020-12-22 04:54:25,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:25,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886321793] [2020-12-22 04:54:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:30,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886321793] [2020-12-22 04:54:30,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853706169] [2020-12-22 04:54:30,531 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:30,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2020-12-22 04:54:30,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:54:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-22 04:54:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:30,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:30,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2020-12-22 04:54:30,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003536030] [2020-12-22 04:54:30,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-12-22 04:54:30,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:30,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-12-22 04:54:30,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 04:54:30,835 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 96 states. [2020-12-22 04:54:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:31,070 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-12-22 04:54:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-12-22 04:54:31,071 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 100 [2020-12-22 04:54:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:31,071 INFO L225 Difference]: With dead ends: 106 [2020-12-22 04:54:31,071 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 04:54:31,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 04:54:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 04:54:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-22 04:54:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 04:54:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-12-22 04:54:31,075 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2020-12-22 04:54:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:31,076 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-12-22 04:54:31,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-12-22 04:54:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-12-22 04:54:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 04:54:31,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:31,076 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:31,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2020-12-22 04:54:31,290 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:31,290 INFO L82 PathProgramCache]: Analyzing trace with hash 839038155, now seen corresponding path program 94 times [2020-12-22 04:54:31,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:31,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509370511] [2020-12-22 04:54:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509370511] [2020-12-22 04:54:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104409004] [2020-12-22 04:54:36,651 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:36,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:54:36,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:54:36,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 96 conjunts are in the unsatisfiable core [2020-12-22 04:54:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:36,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:36,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2020-12-22 04:54:36,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086051075] [2020-12-22 04:54:36,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-12-22 04:54:36,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-12-22 04:54:36,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-12-22 04:54:36,914 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 97 states. [2020-12-22 04:54:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:37,202 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-12-22 04:54:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-12-22 04:54:37,203 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 101 [2020-12-22 04:54:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:37,204 INFO L225 Difference]: With dead ends: 107 [2020-12-22 04:54:37,204 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 04:54:37,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-12-22 04:54:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 04:54:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-12-22 04:54:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 04:54:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-12-22 04:54:37,208 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2020-12-22 04:54:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:37,208 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-12-22 04:54:37,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-12-22 04:54:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-12-22 04:54:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:54:37,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:37,209 INFO L422 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:37,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:37,423 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash 242044435, now seen corresponding path program 95 times [2020-12-22 04:54:37,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:37,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425318764] [2020-12-22 04:54:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:42,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425318764] [2020-12-22 04:54:42,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978988722] [2020-12-22 04:54:42,893 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:43,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-22 04:54:43,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:54:43,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-22 04:54:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:43,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:43,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2020-12-22 04:54:43,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590348815] [2020-12-22 04:54:43,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-12-22 04:54:43,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:43,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-12-22 04:54:43,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 04:54:43,191 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 98 states. [2020-12-22 04:54:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:43,489 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-12-22 04:54:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-22 04:54:43,490 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 102 [2020-12-22 04:54:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:43,491 INFO L225 Difference]: With dead ends: 108 [2020-12-22 04:54:43,491 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:54:43,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 04:54:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:54:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-12-22 04:54:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:54:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-12-22 04:54:43,495 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2020-12-22 04:54:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:43,496 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-12-22 04:54:43,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-12-22 04:54:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-12-22 04:54:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 04:54:43,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:43,497 INFO L422 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:43,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:43,697 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:43,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:43,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1084891701, now seen corresponding path program 96 times [2020-12-22 04:54:43,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:43,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118773674] [2020-12-22 04:54:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:49,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118773674] [2020-12-22 04:54:49,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964604538] [2020-12-22 04:54:49,317 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:49,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 04:54:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:54:49,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-22 04:54:49,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:49,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:49,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2020-12-22 04:54:49,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115261321] [2020-12-22 04:54:49,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-12-22 04:54:49,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-12-22 04:54:49,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-12-22 04:54:49,600 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 99 states. [2020-12-22 04:54:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:49,869 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2020-12-22 04:54:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-12-22 04:54:49,870 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 103 [2020-12-22 04:54:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:49,878 INFO L225 Difference]: With dead ends: 109 [2020-12-22 04:54:49,878 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 04:54:49,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-12-22 04:54:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 04:54:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-12-22 04:54:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 04:54:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-12-22 04:54:49,884 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2020-12-22 04:54:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:49,885 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-12-22 04:54:49,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-12-22 04:54:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-12-22 04:54:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:54:49,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:49,886 INFO L422 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:50,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-12-22 04:54:50,100 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash 729761043, now seen corresponding path program 97 times [2020-12-22 04:54:50,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:50,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981163866] [2020-12-22 04:54:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:55,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981163866] [2020-12-22 04:54:55,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38566026] [2020-12-22 04:54:55,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:54:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-22 04:54:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:54:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:54:56,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:54:56,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2020-12-22 04:54:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474984675] [2020-12-22 04:54:56,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-12-22 04:54:56,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:54:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-12-22 04:54:56,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 04:54:56,120 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 100 states. [2020-12-22 04:54:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:54:56,428 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-22 04:54:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-22 04:54:56,429 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 104 [2020-12-22 04:54:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:54:56,430 INFO L225 Difference]: With dead ends: 110 [2020-12-22 04:54:56,430 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:54:56,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 04:54:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:54:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 04:54:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 04:54:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-12-22 04:54:56,435 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2020-12-22 04:54:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:54:56,436 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-12-22 04:54:56,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-12-22 04:54:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-12-22 04:54:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 04:54:56,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:54:56,436 INFO L422 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:54:56,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:54:56,652 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:54:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:54:56,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1149421259, now seen corresponding path program 98 times [2020-12-22 04:54:56,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:54:56,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772323102] [2020-12-22 04:54:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:54:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:55:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:55:02,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772323102] [2020-12-22 04:55:02,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86799074] [2020-12-22 04:55:02,557 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:55:02,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:55:02,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:55:02,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-22 04:55:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:55:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:55:02,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:55:02,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2020-12-22 04:55:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225820581] [2020-12-22 04:55:02,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-12-22 04:55:02,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:55:02,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-12-22 04:55:02,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-12-22 04:55:02,818 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 101 states. [2020-12-22 04:55:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:55:03,011 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-12-22 04:55:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-12-22 04:55:03,012 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 105 [2020-12-22 04:55:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:55:03,013 INFO L225 Difference]: With dead ends: 111 [2020-12-22 04:55:03,013 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 04:55:03,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-12-22 04:55:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 04:55:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-22 04:55:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 04:55:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-22 04:55:03,019 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2020-12-22 04:55:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:55:03,019 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-22 04:55:03,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-12-22 04:55:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-22 04:55:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 04:55:03,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:55:03,020 INFO L422 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:55:03,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:55:03,235 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:55:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:55:03,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1273986067, now seen corresponding path program 99 times [2020-12-22 04:55:03,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:55:03,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657052346] [2020-12-22 04:55:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:55:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat