/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/array-examples/standard_minInArray_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:38:29,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:38:29,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:38:29,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:38:29,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:38:29,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:38:29,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:38:29,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:38:29,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:38:29,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:38:29,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:38:29,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:38:29,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:38:29,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:38:29,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:38:29,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:38:29,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:38:29,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:38:29,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:38:29,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:38:29,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:38:29,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:38:29,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:38:29,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:38:29,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:38:29,830 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:38:29,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:38:29,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:38:29,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:38:29,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:38:29,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:38:29,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:38:29,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:38:29,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:38:29,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:38:29,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:38:29,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:38:29,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:38:29,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:29,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:38:29,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:38:29,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:38:29,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:38:29,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:38:29,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:38:29,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:38:29,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:38:30,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:38:30,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:38:30,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:38:30,268 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:38:30,269 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:38:30,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2020-12-21 21:38:30,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8169b32b/d8fb759f365f4798aef09072cb9438a7/FLAGf46229d07 [2020-12-21 21:38:31,085 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:38:31,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2020-12-21 21:38:31,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8169b32b/d8fb759f365f4798aef09072cb9438a7/FLAGf46229d07 [2020-12-21 21:38:31,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8169b32b/d8fb759f365f4798aef09072cb9438a7 [2020-12-21 21:38:31,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:38:31,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:38:31,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:31,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:38:31,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:38:31,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e31bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31, skipping insertion in model container [2020-12-21 21:38:31,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:38:31,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:38:31,621 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/array-examples/standard_minInArray_ground-1.i[821,834] [2020-12-21 21:38:31,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:31,660 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:38:31,679 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/array-examples/standard_minInArray_ground-1.i[821,834] [2020-12-21 21:38:31,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:31,722 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:38:31,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31 WrapperNode [2020-12-21 21:38:31,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:31,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:31,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:38:31,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:38:31,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:31,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:38:31,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:38:31,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:38:31,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... [2020-12-21 21:38:31,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:38:31,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:38:31,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:38:31,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:38:31,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:38:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:38:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:38:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:38:31,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:38:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:38:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:38:32,247 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:38:32,247 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 21:38:32,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:32 BoogieIcfgContainer [2020-12-21 21:38:32,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:38:32,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:38:32,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:38:32,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:38:32,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:38:31" (1/3) ... [2020-12-21 21:38:32,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dfbc49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:32, skipping insertion in model container [2020-12-21 21:38:32,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:31" (2/3) ... [2020-12-21 21:38:32,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dfbc49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:32, skipping insertion in model container [2020-12-21 21:38:32,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:32" (3/3) ... [2020-12-21 21:38:32,278 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2020-12-21 21:38:32,302 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:38:32,314 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:38:32,367 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:38:32,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:38:32,456 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:38:32,456 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:38:32,456 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:38:32,456 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:38:32,456 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:38:32,457 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:38:32,457 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:38:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-21 21:38:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:32,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:32,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:32,490 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2020-12-21 21:38:32,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:32,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718465200] [2020-12-21 21:38:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:32,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718465200] [2020-12-21 21:38:32,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:32,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:38:32,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497866060] [2020-12-21 21:38:32,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:38:32,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:32,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:38:32,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:32,801 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-21 21:38:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:32,829 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-21 21:38:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:38:32,830 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 21:38:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:32,847 INFO L225 Difference]: With dead ends: 34 [2020-12-21 21:38:32,847 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 21:38:32,857 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 [2020-12-21 21:38:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 21:38:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-21 21:38:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 21:38:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 21:38:32,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 21:38:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:32,900 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 21:38:32,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:38:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 21:38:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:32,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:32,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:32,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:38:32,902 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:32,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:32,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2015341610, now seen corresponding path program 1 times [2020-12-21 21:38:32,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:32,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353994036] [2020-12-21 21:38:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:32,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353994036] [2020-12-21 21:38:32,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:32,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:32,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932850558] [2020-12-21 21:38:32,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:32,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:32,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:32,966 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-21 21:38:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:32,992 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-21 21:38:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:32,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:38:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:32,994 INFO L225 Difference]: With dead ends: 28 [2020-12-21 21:38:32,994 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 21:38:32,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 21:38:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-21 21:38:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:38:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-21 21:38:33,000 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2020-12-21 21:38:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:33,000 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-21 21:38:33,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-21 21:38:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:38:33,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:33,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:33,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:38:33,002 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:33,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:33,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2020-12-21 21:38:33,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:33,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940149713] [2020-12-21 21:38:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:33,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940149713] [2020-12-21 21:38:33,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003099359] [2020-12-21 21:38:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:33,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:38:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:33,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:38:33,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:38:33,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294016908] [2020-12-21 21:38:33,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:33,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:33,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:33,190 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-12-21 21:38:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:33,215 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-21 21:38:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:33,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:38:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:33,217 INFO L225 Difference]: With dead ends: 26 [2020-12-21 21:38:33,217 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 21:38:33,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 21:38:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-12-21 21:38:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:38:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-21 21:38:33,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-12-21 21:38:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:33,223 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-21 21:38:33,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-21 21:38:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:38:33,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:33,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:33,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:38:33,441 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2020-12-21 21:38:33,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:33,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207397171] [2020-12-21 21:38:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:33,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207397171] [2020-12-21 21:38:33,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018642400] [2020-12-21 21:38:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:33,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:38:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:33,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:33,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:38:33,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615256831] [2020-12-21 21:38:33,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:38:33,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:33,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:38:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:33,611 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-21 21:38:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:33,636 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-21 21:38:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:33,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:38:33,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:33,637 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:38:33,638 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:38:33,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:38:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-21 21:38:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:38:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-21 21:38:33,643 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2020-12-21 21:38:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:33,643 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-21 21:38:33,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:38:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-21 21:38:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:38:33,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:33,645 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:33,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:33,859 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1501972051, now seen corresponding path program 2 times [2020-12-21 21:38:33,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:33,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620432465] [2020-12-21 21:38:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:38:33,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620432465] [2020-12-21 21:38:33,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964351822] [2020-12-21 21:38:33,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:33,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:33,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:34,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:34,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:38:34,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887479295] [2020-12-21 21:38:34,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:38:34,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:34,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:38:34,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:34,038 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-12-21 21:38:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:34,093 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-12-21 21:38:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:34,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-21 21:38:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:34,095 INFO L225 Difference]: With dead ends: 39 [2020-12-21 21:38:34,095 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:38:34,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:38:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-21 21:38:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:38:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-21 21:38:34,102 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-12-21 21:38:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:34,102 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-21 21:38:34,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:38:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-21 21:38:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:38:34,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:34,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:34,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:34,318 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1207096048, now seen corresponding path program 3 times [2020-12-21 21:38:34,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:34,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846526537] [2020-12-21 21:38:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:34,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846526537] [2020-12-21 21:38:34,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709035408] [2020-12-21 21:38:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:34,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:38:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:34,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:38:34,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:34,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:38:34,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091244454] [2020-12-21 21:38:34,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:38:34,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:34,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:38:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:34,621 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 9 states. [2020-12-21 21:38:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:34,711 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-12-21 21:38:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:38:34,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-21 21:38:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:34,712 INFO L225 Difference]: With dead ends: 47 [2020-12-21 21:38:34,713 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:38:34,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:38:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-21 21:38:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:38:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-21 21:38:34,720 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 21 [2020-12-21 21:38:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:34,720 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-21 21:38:34,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:38:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-21 21:38:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:38:34,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:34,722 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:34,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:34,938 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:34,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1223744631, now seen corresponding path program 4 times [2020-12-21 21:38:34,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:34,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103919383] [2020-12-21 21:38:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:35,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103919383] [2020-12-21 21:38:35,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121857399] [2020-12-21 21:38:35,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:35,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:35,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:35,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:38:35,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852098470] [2020-12-21 21:38:35,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:38:35,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:38:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:35,166 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2020-12-21 21:38:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:35,197 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-12-21 21:38:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:35,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-21 21:38:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:35,198 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:38:35,199 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:38:35,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:38:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-21 21:38:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:38:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-21 21:38:35,205 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 26 [2020-12-21 21:38:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:35,206 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-21 21:38:35,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:38:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-21 21:38:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:38:35,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:35,207 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:35,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:38:35,409 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash -403565831, now seen corresponding path program 5 times [2020-12-21 21:38:35,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:35,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44147374] [2020-12-21 21:38:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:35,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44147374] [2020-12-21 21:38:35,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803337594] [2020-12-21 21:38:35,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:35,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:38:35,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:35,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:38:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:38:35,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:35,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:38:35,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740480593] [2020-12-21 21:38:35,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:38:35,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:35,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:38:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:35,639 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2020-12-21 21:38:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:35,705 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-12-21 21:38:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:38:35,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-21 21:38:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:35,707 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:38:35,707 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 21:38:35,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 21:38:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-21 21:38:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:38:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-12-21 21:38:35,714 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 28 [2020-12-21 21:38:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:35,714 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-12-21 21:38:35,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:38:35,714 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-12-21 21:38:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:38:35,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:35,716 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:35,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:35,930 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:35,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1934839690, now seen corresponding path program 6 times [2020-12-21 21:38:35,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:35,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879003015] [2020-12-21 21:38:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:38:36,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879003015] [2020-12-21 21:38:36,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755773702] [2020-12-21 21:38:36,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:36,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:38:36,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:38:36,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:36,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:38:36,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358654125] [2020-12-21 21:38:36,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:38:36,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:38:36,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:36,221 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 14 states. [2020-12-21 21:38:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:36,319 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-12-21 21:38:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:38:36,320 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-12-21 21:38:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:36,321 INFO L225 Difference]: With dead ends: 65 [2020-12-21 21:38:36,321 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:38:36,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:38:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-12-21 21:38:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:38:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-12-21 21:38:36,327 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 33 [2020-12-21 21:38:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:36,328 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-12-21 21:38:36,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:38:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-12-21 21:38:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:38:36,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:36,329 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:36,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:36,543 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash 172781213, now seen corresponding path program 7 times [2020-12-21 21:38:36,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:36,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288290723] [2020-12-21 21:38:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:36,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288290723] [2020-12-21 21:38:36,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203758418] [2020-12-21 21:38:36,663 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 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 [2020-12-21 21:38:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:38:36,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:36,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:36,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:38:36,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340813413] [2020-12-21 21:38:36,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:38:36,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:36,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:38:36,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:36,817 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 11 states. [2020-12-21 21:38:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:36,859 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-12-21 21:38:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:38:36,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-12-21 21:38:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:36,866 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:38:36,867 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:38:36,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:38:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-21 21:38:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:38:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-21 21:38:36,879 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 38 [2020-12-21 21:38:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:36,880 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-21 21:38:36,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:38:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-21 21:38:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:38:36,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:36,882 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:37,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:38:37,083 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:37,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash -239734241, now seen corresponding path program 8 times [2020-12-21 21:38:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:37,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760584960] [2020-12-21 21:38:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:37,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760584960] [2020-12-21 21:38:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218311600] [2020-12-21 21:38:37,254 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 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 [2020-12-21 21:38:37,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:37,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:37,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:38:37,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:37,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:37,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:38:37,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858881782] [2020-12-21 21:38:37,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:38:37,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:37,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:38:37,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:37,386 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 12 states. [2020-12-21 21:38:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:37,424 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-12-21 21:38:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:38:37,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-21 21:38:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:37,426 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:38:37,426 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 21:38:37,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 21:38:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-21 21:38:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 21:38:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-21 21:38:37,433 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 40 [2020-12-21 21:38:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:37,433 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-21 21:38:37,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:38:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-21 21:38:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 21:38:37,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:37,435 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:37,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:37,650 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:37,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1530094303, now seen corresponding path program 9 times [2020-12-21 21:38:37,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:37,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907242446] [2020-12-21 21:38:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:37,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907242446] [2020-12-21 21:38:37,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84844074] [2020-12-21 21:38:37,842 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 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 [2020-12-21 21:38:37,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:38:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:38:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:38:38,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:38,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:38:38,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878748293] [2020-12-21 21:38:38,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:38:38,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:38,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:38:38,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:38,064 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 18 states. [2020-12-21 21:38:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:38,167 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-12-21 21:38:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:38:38,168 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-12-21 21:38:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:38,169 INFO L225 Difference]: With dead ends: 77 [2020-12-21 21:38:38,169 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:38:38,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:38:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-12-21 21:38:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:38:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-21 21:38:38,175 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2020-12-21 21:38:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:38,176 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-21 21:38:38,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:38:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-21 21:38:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:38:38,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:38,177 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:38,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:38,392 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1935274014, now seen corresponding path program 10 times [2020-12-21 21:38:38,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:38,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347797701] [2020-12-21 21:38:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:38,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347797701] [2020-12-21 21:38:38,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675047839] [2020-12-21 21:38:38,545 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 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 [2020-12-21 21:38:38,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:38,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:38:38,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:38,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:38,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:38:38,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104362903] [2020-12-21 21:38:38,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:38:38,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:38,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:38:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:38,737 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 14 states. [2020-12-21 21:38:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:38,788 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-12-21 21:38:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:38:38,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-12-21 21:38:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:38,790 INFO L225 Difference]: With dead ends: 80 [2020-12-21 21:38:38,790 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:38:38,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:38,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:38:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-21 21:38:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:38:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-21 21:38:38,796 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 47 [2020-12-21 21:38:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:38,797 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-21 21:38:38,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:38:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-21 21:38:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:38:38,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:38,798 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:39,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:38:39,011 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:39,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1920246112, now seen corresponding path program 11 times [2020-12-21 21:38:39,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:39,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847036497] [2020-12-21 21:38:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:39,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847036497] [2020-12-21 21:38:39,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142288233] [2020-12-21 21:38:39,176 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 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 [2020-12-21 21:38:39,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:38:39,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:38:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:39,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:39,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:38:39,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049090552] [2020-12-21 21:38:39,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:38:39,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:38:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:38:39,454 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 15 states. [2020-12-21 21:38:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:39,507 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-12-21 21:38:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:38:39,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-12-21 21:38:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:39,509 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:38:39,509 INFO L226 Difference]: Without dead ends: 55 [2020-12-21 21:38:39,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:38:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-21 21:38:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-21 21:38:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:38:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-21 21:38:39,515 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 49 [2020-12-21 21:38:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:39,516 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-21 21:38:39,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:38:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-21 21:38:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:38:39,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:39,517 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:39,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:38:39,731 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:39,732 INFO L82 PathProgramCache]: Analyzing trace with hash -363334178, now seen corresponding path program 12 times [2020-12-21 21:38:39,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:39,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342358706] [2020-12-21 21:38:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:39,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342358706] [2020-12-21 21:38:39,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082092408] [2020-12-21 21:38:39,911 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 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 [2020-12-21 21:38:40,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:38:40,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:40,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:38:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-21 21:38:40,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:40,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-12-21 21:38:40,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785350036] [2020-12-21 21:38:40,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:38:40,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:40,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:38:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:38:40,276 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 22 states. [2020-12-21 21:38:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:40,411 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-12-21 21:38:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:38:40,412 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-12-21 21:38:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:40,413 INFO L225 Difference]: With dead ends: 89 [2020-12-21 21:38:40,413 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:38:40,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:38:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:38:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-12-21 21:38:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:38:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-12-21 21:38:40,435 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 51 [2020-12-21 21:38:40,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:40,436 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-12-21 21:38:40,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:38:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-12-21 21:38:40,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:38:40,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:40,437 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:40,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:38:40,653 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1122895031, now seen corresponding path program 13 times [2020-12-21 21:38:40,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:40,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921297097] [2020-12-21 21:38:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921297097] [2020-12-21 21:38:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38134377] [2020-12-21 21:38:40,906 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 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 [2020-12-21 21:38:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:40,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:38:40,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:41,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:41,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:38:41,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703370081] [2020-12-21 21:38:41,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:38:41,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:41,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:38:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:38:41,074 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 17 states. [2020-12-21 21:38:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:41,143 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2020-12-21 21:38:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:38:41,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2020-12-21 21:38:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:41,146 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:38:41,146 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:38:41,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:38:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:38:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:38:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:38:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-12-21 21:38:41,152 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 56 [2020-12-21 21:38:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:41,152 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-12-21 21:38:41,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:38:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-12-21 21:38:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:38:41,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:41,153 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:41,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:41,367 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1664720309, now seen corresponding path program 14 times [2020-12-21 21:38:41,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:41,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781699132] [2020-12-21 21:38:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:41,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781699132] [2020-12-21 21:38:41,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620378304] [2020-12-21 21:38:41,567 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 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 [2020-12-21 21:38:41,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:41,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:41,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:38:41,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:41,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:41,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:38:41,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568500238] [2020-12-21 21:38:41,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:38:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:38:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:41,777 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 18 states. [2020-12-21 21:38:41,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:41,841 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-12-21 21:38:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:38:41,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-12-21 21:38:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:41,842 INFO L225 Difference]: With dead ends: 94 [2020-12-21 21:38:41,843 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:38:41,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:38:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-21 21:38:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:38:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-12-21 21:38:41,848 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 58 [2020-12-21 21:38:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:41,848 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-12-21 21:38:41,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:38:41,849 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-12-21 21:38:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:38:41,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:41,849 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:42,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:38:42,064 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:42,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1627197645, now seen corresponding path program 15 times [2020-12-21 21:38:42,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:42,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027505285] [2020-12-21 21:38:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:42,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027505285] [2020-12-21 21:38:42,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827250265] [2020-12-21 21:38:42,345 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 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 [2020-12-21 21:38:42,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:38:42,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:38:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:38:42,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:42,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-21 21:38:42,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499066575] [2020-12-21 21:38:42,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:38:42,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:38:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:38:42,665 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 26 states. [2020-12-21 21:38:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:42,808 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-12-21 21:38:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:38:42,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-12-21 21:38:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:42,810 INFO L225 Difference]: With dead ends: 101 [2020-12-21 21:38:42,810 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:38:42,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:38:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:38:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-12-21 21:38:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:38:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-12-21 21:38:42,816 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 60 [2020-12-21 21:38:42,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:42,816 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-12-21 21:38:42,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:38:42,816 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-12-21 21:38:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:38:42,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:42,817 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:43,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:38:43,033 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:43,034 INFO L82 PathProgramCache]: Analyzing trace with hash -220128970, now seen corresponding path program 16 times [2020-12-21 21:38:43,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:43,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615824584] [2020-12-21 21:38:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:43,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615824584] [2020-12-21 21:38:43,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988477223] [2020-12-21 21:38:43,321 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 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 [2020-12-21 21:38:43,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:43,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:43,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:38:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:43,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:43,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:38:43,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307753300] [2020-12-21 21:38:43,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:38:43,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:43,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:38:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:38:43,517 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 20 states. [2020-12-21 21:38:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:43,586 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-12-21 21:38:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:38:43,587 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-12-21 21:38:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:43,589 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:38:43,589 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:38:43,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:38:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:38:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-21 21:38:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 21:38:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-12-21 21:38:43,600 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 65 [2020-12-21 21:38:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:43,600 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-12-21 21:38:43,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:38:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-12-21 21:38:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:38:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:43,601 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:43,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:43,810 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash -222071692, now seen corresponding path program 17 times [2020-12-21 21:38:43,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:43,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987377243] [2020-12-21 21:38:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987377243] [2020-12-21 21:38:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036203395] [2020-12-21 21:38:44,107 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 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 [2020-12-21 21:38:44,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:38:44,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:38:44,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:44,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:44,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:38:44,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323078064] [2020-12-21 21:38:44,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:38:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:38:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:38:44,488 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 21 states. [2020-12-21 21:38:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:44,565 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-12-21 21:38:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:38:44,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-12-21 21:38:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:44,567 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:38:44,567 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 21:38:44,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:38:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 21:38:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-21 21:38:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:38:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-12-21 21:38:44,572 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 67 [2020-12-21 21:38:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:44,572 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-12-21 21:38:44,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:38:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-12-21 21:38:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:38:44,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:44,573 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:44,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:44,788 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2089027534, now seen corresponding path program 18 times [2020-12-21 21:38:44,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:44,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043852101] [2020-12-21 21:38:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:45,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043852101] [2020-12-21 21:38:45,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337657601] [2020-12-21 21:38:45,090 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 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 [2020-12-21 21:38:45,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 21:38:45,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:38:45,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-21 21:38:45,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:45,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2020-12-21 21:38:45,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520869391] [2020-12-21 21:38:45,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:38:45,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:38:45,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:38:45,907 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 30 states. [2020-12-21 21:38:46,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:46,064 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2020-12-21 21:38:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:38:46,064 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-12-21 21:38:46,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:46,065 INFO L225 Difference]: With dead ends: 113 [2020-12-21 21:38:46,065 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:38:46,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:38:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:38:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-12-21 21:38:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-21 21:38:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-12-21 21:38:46,070 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 69 [2020-12-21 21:38:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:46,071 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-12-21 21:38:46,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:38:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-12-21 21:38:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-21 21:38:46,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:46,072 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:46,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:46,287 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:46,289 INFO L82 PathProgramCache]: Analyzing trace with hash -74396683, now seen corresponding path program 19 times [2020-12-21 21:38:46,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:46,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713764423] [2020-12-21 21:38:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:46,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713764423] [2020-12-21 21:38:46,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438830056] [2020-12-21 21:38:46,630 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 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 [2020-12-21 21:38:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:46,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:38:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:46,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:46,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:38:46,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890355434] [2020-12-21 21:38:46,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:38:46,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:46,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:38:46,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:38:46,811 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 23 states. [2020-12-21 21:38:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:46,885 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-21 21:38:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:38:46,886 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2020-12-21 21:38:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:46,886 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:38:46,887 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:38:46,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:38:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:38:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-21 21:38:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:38:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-12-21 21:38:46,891 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 74 [2020-12-21 21:38:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:46,892 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-12-21 21:38:46,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:38:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-12-21 21:38:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 21:38:46,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:46,893 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:47,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:38:47,108 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:47,109 INFO L82 PathProgramCache]: Analyzing trace with hash -17942921, now seen corresponding path program 20 times [2020-12-21 21:38:47,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:47,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690878837] [2020-12-21 21:38:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:47,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690878837] [2020-12-21 21:38:47,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066431058] [2020-12-21 21:38:47,491 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 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 [2020-12-21 21:38:47,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:47,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:47,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:38:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:47,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:47,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:38:47,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678313256] [2020-12-21 21:38:47,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:38:47,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:38:47,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:38:47,719 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 24 states. [2020-12-21 21:38:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:47,799 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-12-21 21:38:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:38:47,800 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-12-21 21:38:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:47,801 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:38:47,801 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 21:38:47,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:38:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 21:38:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-21 21:38:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 21:38:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-12-21 21:38:47,807 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 76 [2020-12-21 21:38:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:47,808 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-12-21 21:38:47,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:38:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-12-21 21:38:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-21 21:38:47,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:47,809 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:48,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:38:48,024 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:48,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1600452487, now seen corresponding path program 21 times [2020-12-21 21:38:48,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:48,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751643386] [2020-12-21 21:38:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:48,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751643386] [2020-12-21 21:38:48,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015321023] [2020-12-21 21:38:48,494 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 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 [2020-12-21 21:38:48,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:38:48,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:38:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-21 21:38:48,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:48,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2020-12-21 21:38:48,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006611153] [2020-12-21 21:38:48,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:38:48,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:48,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:38:48,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:38:48,946 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 34 states. [2020-12-21 21:38:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:49,126 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2020-12-21 21:38:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:38:49,126 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-12-21 21:38:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:49,127 INFO L225 Difference]: With dead ends: 125 [2020-12-21 21:38:49,127 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:38:49,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:38:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:38:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-12-21 21:38:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 21:38:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2020-12-21 21:38:49,132 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 78 [2020-12-21 21:38:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:49,133 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2020-12-21 21:38:49,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:38:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2020-12-21 21:38:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:38:49,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:49,134 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:49,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:49,350 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:49,351 INFO L82 PathProgramCache]: Analyzing trace with hash -754057590, now seen corresponding path program 22 times [2020-12-21 21:38:49,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:49,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189649169] [2020-12-21 21:38:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:38:49,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189649169] [2020-12-21 21:38:49,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303567937] [2020-12-21 21:38:49,754 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 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 [2020-12-21 21:38:49,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:49,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:49,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:38:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-21 21:38:50,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:50,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2020-12-21 21:38:50,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247192895] [2020-12-21 21:38:50,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:38:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:38:50,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:38:50,235 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 36 states. [2020-12-21 21:38:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:50,437 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2020-12-21 21:38:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:38:50,437 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2020-12-21 21:38:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:50,438 INFO L225 Difference]: With dead ends: 133 [2020-12-21 21:38:50,438 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 21:38:50,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:38:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 21:38:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-12-21 21:38:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 21:38:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2020-12-21 21:38:50,443 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 83 [2020-12-21 21:38:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:50,443 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2020-12-21 21:38:50,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:38:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2020-12-21 21:38:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-21 21:38:50,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:50,444 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:50,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:38:50,659 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash -77685987, now seen corresponding path program 23 times [2020-12-21 21:38:50,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:50,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711671528] [2020-12-21 21:38:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:38:51,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711671528] [2020-12-21 21:38:51,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537518857] [2020-12-21 21:38:51,102 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 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 [2020-12-21 21:38:51,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 21:38:51,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:51,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:38:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-21 21:38:52,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:52,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2020-12-21 21:38:52,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889440095] [2020-12-21 21:38:52,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:38:52,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:38:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:38:52,226 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 38 states. [2020-12-21 21:38:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:52,418 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2020-12-21 21:38:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:38:52,419 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2020-12-21 21:38:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:52,420 INFO L225 Difference]: With dead ends: 141 [2020-12-21 21:38:52,420 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:38:52,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:38:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:38:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-12-21 21:38:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 21:38:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-12-21 21:38:52,427 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 88 [2020-12-21 21:38:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:52,427 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-12-21 21:38:52,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:38:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-12-21 21:38:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 21:38:52,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:52,429 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:52,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:52,643 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:52,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:52,643 INFO L82 PathProgramCache]: Analyzing trace with hash -182696986, now seen corresponding path program 24 times [2020-12-21 21:38:52,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:52,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804084361] [2020-12-21 21:38:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:38:53,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804084361] [2020-12-21 21:38:53,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611455291] [2020-12-21 21:38:53,113 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 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 [2020-12-21 21:38:54,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 21:38:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:54,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:38:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:38:54,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:54,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:38:54,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053299780] [2020-12-21 21:38:54,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:38:54,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:54,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:38:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:38:54,355 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 28 states. [2020-12-21 21:38:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:54,444 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2020-12-21 21:38:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:38:54,445 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 93 [2020-12-21 21:38:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:54,445 INFO L225 Difference]: With dead ends: 144 [2020-12-21 21:38:54,446 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:38:54,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:38:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:38:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-21 21:38:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:38:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-12-21 21:38:54,450 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 93 [2020-12-21 21:38:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:54,451 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-12-21 21:38:54,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:38:54,451 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-12-21 21:38:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 21:38:54,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:54,452 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:54,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:38:54,666 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1785629148, now seen corresponding path program 25 times [2020-12-21 21:38:54,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:54,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242105112] [2020-12-21 21:38:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:38:55,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242105112] [2020-12-21 21:38:55,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114614706] [2020-12-21 21:38:55,160 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 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 [2020-12-21 21:38:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:38:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:38:55,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:55,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:38:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767821267] [2020-12-21 21:38:55,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:38:55,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:38:55,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:38:55,376 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 29 states. [2020-12-21 21:38:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:55,473 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2020-12-21 21:38:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:38:55,474 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-12-21 21:38:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:55,475 INFO L225 Difference]: With dead ends: 146 [2020-12-21 21:38:55,475 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 21:38:55,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:38:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 21:38:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-21 21:38:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 21:38:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-12-21 21:38:55,479 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 95 [2020-12-21 21:38:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:55,480 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-12-21 21:38:55,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:38:55,480 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-12-21 21:38:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:38:55,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:55,482 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:55,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:38:55,696 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:55,697 INFO L82 PathProgramCache]: Analyzing trace with hash -310177566, now seen corresponding path program 26 times [2020-12-21 21:38:55,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:55,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119388613] [2020-12-21 21:38:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:38:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119388613] [2020-12-21 21:38:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615105606] [2020-12-21 21:38:56,191 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 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 [2020-12-21 21:38:56,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:56,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:38:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:38:56,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:56,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:38:56,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345868449] [2020-12-21 21:38:56,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:38:56,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:56,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:38:56,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:38:56,446 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 30 states. [2020-12-21 21:38:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:56,564 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2020-12-21 21:38:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:38:56,565 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2020-12-21 21:38:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:56,567 INFO L225 Difference]: With dead ends: 148 [2020-12-21 21:38:56,567 INFO L226 Difference]: Without dead ends: 103 [2020-12-21 21:38:56,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:38:56,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-21 21:38:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-21 21:38:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-21 21:38:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2020-12-21 21:38:56,573 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 97 [2020-12-21 21:38:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:56,574 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2020-12-21 21:38:56,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:38:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2020-12-21 21:38:56,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 21:38:56,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:56,576 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:56,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:38:56,790 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash 259585056, now seen corresponding path program 27 times [2020-12-21 21:38:56,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:56,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908748030] [2020-12-21 21:38:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:38:57,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908748030] [2020-12-21 21:38:57,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645847261] [2020-12-21 21:38:57,315 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 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 [2020-12-21 21:38:57,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-21 21:38:57,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:38:57,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-21 21:38:57,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:57,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2020-12-21 21:38:57,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912822962] [2020-12-21 21:38:57,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:38:57,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:38:57,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:38:57,936 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 43 states. [2020-12-21 21:38:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:58,167 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2020-12-21 21:38:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:38:58,168 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 99 [2020-12-21 21:38:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:58,169 INFO L225 Difference]: With dead ends: 155 [2020-12-21 21:38:58,169 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:38:58,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:38:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:38:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-12-21 21:38:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 21:38:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2020-12-21 21:38:58,175 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 99 [2020-12-21 21:38:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:58,176 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2020-12-21 21:38:58,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:38:58,178 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2020-12-21 21:38:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 21:38:58,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:58,179 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:58,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:58,393 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:58,394 INFO L82 PathProgramCache]: Analyzing trace with hash 877425095, now seen corresponding path program 28 times [2020-12-21 21:38:58,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:58,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925629303] [2020-12-21 21:38:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:38:59,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925629303] [2020-12-21 21:38:59,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037113753] [2020-12-21 21:38:59,002 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 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 [2020-12-21 21:38:59,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:38:59,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:38:59,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:59,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:38:59,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628490223] [2020-12-21 21:38:59,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:38:59,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:59,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:38:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:38:59,245 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand 32 states. [2020-12-21 21:38:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:59,355 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2020-12-21 21:38:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:38:59,356 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 104 [2020-12-21 21:38:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:59,357 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:38:59,357 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:38:59,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:38:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:38:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-21 21:38:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 21:38:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2020-12-21 21:38:59,362 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 104 [2020-12-21 21:38:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:59,362 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2020-12-21 21:38:59,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:38:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2020-12-21 21:38:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 21:38:59,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:59,364 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:59,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:38:59,578 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:59,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1207300919, now seen corresponding path program 29 times [2020-12-21 21:38:59,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:59,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858346596] [2020-12-21 21:38:59,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:39:00,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858346596] [2020-12-21 21:39:00,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216462162] [2020-12-21 21:39:00,226 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 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 [2020-12-21 21:39:01,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-21 21:39:01,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:39:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-21 21:39:01,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:01,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16] total 46 [2020-12-21 21:39:01,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562430636] [2020-12-21 21:39:01,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:39:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:01,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:39:01,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:39:01,757 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 46 states. [2020-12-21 21:39:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:02,012 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2020-12-21 21:39:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:39:02,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 106 [2020-12-21 21:39:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:02,014 INFO L225 Difference]: With dead ends: 165 [2020-12-21 21:39:02,014 INFO L226 Difference]: Without dead ends: 117 [2020-12-21 21:39:02,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:39:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-21 21:39:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-12-21 21:39:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-21 21:39:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2020-12-21 21:39:02,020 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 106 [2020-12-21 21:39:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:02,020 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2020-12-21 21:39:02,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:39:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2020-12-21 21:39:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 21:39:02,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:02,021 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:02,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:02,237 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1187401926, now seen corresponding path program 30 times [2020-12-21 21:39:02,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:02,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883161545] [2020-12-21 21:39:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:39:02,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883161545] [2020-12-21 21:39:02,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910695695] [2020-12-21 21:39:02,947 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 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 [2020-12-21 21:39:06,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-21 21:39:06,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:39:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-21 21:39:06,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:06,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2020-12-21 21:39:06,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055454460] [2020-12-21 21:39:06,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:39:06,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:39:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:39:06,813 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand 48 states. [2020-12-21 21:39:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:07,070 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2020-12-21 21:39:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:39:07,070 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 111 [2020-12-21 21:39:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:07,072 INFO L225 Difference]: With dead ends: 173 [2020-12-21 21:39:07,072 INFO L226 Difference]: Without dead ends: 122 [2020-12-21 21:39:07,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:39:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-21 21:39:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-12-21 21:39:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-21 21:39:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-12-21 21:39:07,077 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 111 [2020-12-21 21:39:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:07,078 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-12-21 21:39:07,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:39:07,078 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-12-21 21:39:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-21 21:39:07,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:07,079 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:07,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:39:07,295 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:07,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1343124845, now seen corresponding path program 31 times [2020-12-21 21:39:07,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:07,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923072656] [2020-12-21 21:39:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:39:08,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923072656] [2020-12-21 21:39:08,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323851909] [2020-12-21 21:39:08,058 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 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 [2020-12-21 21:39:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:39:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:39:08,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:08,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:39:08,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057548705] [2020-12-21 21:39:08,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:39:08,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:08,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:39:08,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:39:08,303 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 35 states. [2020-12-21 21:39:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:08,445 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2020-12-21 21:39:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:39:08,446 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 116 [2020-12-21 21:39:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:08,447 INFO L225 Difference]: With dead ends: 176 [2020-12-21 21:39:08,447 INFO L226 Difference]: Without dead ends: 122 [2020-12-21 21:39:08,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:39:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-21 21:39:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-12-21 21:39:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-21 21:39:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2020-12-21 21:39:08,452 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 116 [2020-12-21 21:39:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:08,452 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2020-12-21 21:39:08,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:39:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2020-12-21 21:39:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-21 21:39:08,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:08,454 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:08,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 21:39:08,670 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1380031855, now seen corresponding path program 32 times [2020-12-21 21:39:08,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:08,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086012267] [2020-12-21 21:39:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:39:09,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086012267] [2020-12-21 21:39:09,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814694458] [2020-12-21 21:39:09,394 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 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 [2020-12-21 21:39:09,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:39:09,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:39:09,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:09,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:39:09,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68697416] [2020-12-21 21:39:09,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:39:09,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:39:09,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:39:09,647 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand 36 states. [2020-12-21 21:39:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:09,765 INFO L93 Difference]: Finished difference Result 178 states and 212 transitions. [2020-12-21 21:39:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:39:09,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 118 [2020-12-21 21:39:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:09,766 INFO L225 Difference]: With dead ends: 178 [2020-12-21 21:39:09,766 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 21:39:09,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:39:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 21:39:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-21 21:39:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-21 21:39:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2020-12-21 21:39:09,771 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 118 [2020-12-21 21:39:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:09,772 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2020-12-21 21:39:09,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:39:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2020-12-21 21:39:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-21 21:39:09,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:09,773 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:09,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:39:09,988 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:09,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1807037199, now seen corresponding path program 33 times [2020-12-21 21:39:09,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:09,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515748986] [2020-12-21 21:39:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:39:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515748986] [2020-12-21 21:39:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403175344] [2020-12-21 21:39:10,834 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 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 [2020-12-21 21:39:11,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 21:39:11,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:39:11,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-12-21 21:39:11,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:11,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2020-12-21 21:39:11,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778884731] [2020-12-21 21:39:11,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 21:39:11,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:11,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 21:39:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:39:11,834 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand 52 states. [2020-12-21 21:39:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:12,159 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2020-12-21 21:39:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 21:39:12,160 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 120 [2020-12-21 21:39:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:12,161 INFO L225 Difference]: With dead ends: 185 [2020-12-21 21:39:12,161 INFO L226 Difference]: Without dead ends: 131 [2020-12-21 21:39:12,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:39:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-21 21:39:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-12-21 21:39:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-21 21:39:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2020-12-21 21:39:12,167 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 120 [2020-12-21 21:39:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:12,168 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2020-12-21 21:39:12,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 21:39:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2020-12-21 21:39:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-21 21:39:12,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:12,169 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:12,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:39:12,383 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:12,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1399826030, now seen corresponding path program 34 times [2020-12-21 21:39:12,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:12,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957898585] [2020-12-21 21:39:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:39:13,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957898585] [2020-12-21 21:39:13,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892910855] [2020-12-21 21:39:13,285 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 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 [2020-12-21 21:39:13,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:13,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:39:13,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:39:13,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:13,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:39:13,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178989594] [2020-12-21 21:39:13,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:39:13,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:13,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:39:13,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:39:13,540 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand 38 states. [2020-12-21 21:39:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:13,681 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2020-12-21 21:39:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:39:13,682 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 125 [2020-12-21 21:39:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:13,683 INFO L225 Difference]: With dead ends: 188 [2020-12-21 21:39:13,683 INFO L226 Difference]: Without dead ends: 131 [2020-12-21 21:39:13,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:39:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-21 21:39:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-21 21:39:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-21 21:39:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2020-12-21 21:39:13,688 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 125 [2020-12-21 21:39:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:13,689 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2020-12-21 21:39:13,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:39:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2020-12-21 21:39:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-21 21:39:13,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:13,690 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:13,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:39:13,896 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash -704834608, now seen corresponding path program 35 times [2020-12-21 21:39:13,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:13,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451426477] [2020-12-21 21:39:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:39:14,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451426477] [2020-12-21 21:39:14,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270276263] [2020-12-21 21:39:14,812 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 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 [2020-12-21 21:39:17,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-21 21:39:17,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:39:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:39:17,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:17,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-21 21:39:17,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086346085] [2020-12-21 21:39:17,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:39:17,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:17,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:39:17,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:39:17,441 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand 39 states. [2020-12-21 21:39:17,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:17,596 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2020-12-21 21:39:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:39:17,596 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 127 [2020-12-21 21:39:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:17,597 INFO L225 Difference]: With dead ends: 190 [2020-12-21 21:39:17,598 INFO L226 Difference]: Without dead ends: 133 [2020-12-21 21:39:17,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:39:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-21 21:39:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-21 21:39:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-21 21:39:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2020-12-21 21:39:17,603 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 127 [2020-12-21 21:39:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:17,603 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2020-12-21 21:39:17,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:39:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2020-12-21 21:39:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-21 21:39:17,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:17,604 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:17,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:39:17,818 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1461991054, now seen corresponding path program 36 times [2020-12-21 21:39:17,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:17,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349845302] [2020-12-21 21:39:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:39:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349845302] [2020-12-21 21:39:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112791163] [2020-12-21 21:39:18,818 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 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 [2020-12-21 21:39:23,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2020-12-21 21:39:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:39:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-12-21 21:39:24,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:24,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 19] total 56 [2020-12-21 21:39:24,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010268336] [2020-12-21 21:39:24,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-21 21:39:24,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:24,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-21 21:39:24,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:39:24,087 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand 56 states. [2020-12-21 21:39:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:24,331 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-21 21:39:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-21 21:39:24,332 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 129 [2020-12-21 21:39:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:24,333 INFO L225 Difference]: With dead ends: 197 [2020-12-21 21:39:24,334 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 21:39:24,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:39:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 21:39:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-12-21 21:39:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 21:39:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2020-12-21 21:39:24,340 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 129 [2020-12-21 21:39:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:24,340 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2020-12-21 21:39:24,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-21 21:39:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2020-12-21 21:39:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-21 21:39:24,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:24,341 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:24,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:39:24,555 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:24,555 INFO L82 PathProgramCache]: Analyzing trace with hash 975069465, now seen corresponding path program 37 times [2020-12-21 21:39:24,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:24,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350430407] [2020-12-21 21:39:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:39:25,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350430407] [2020-12-21 21:39:25,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174181879] [2020-12-21 21:39:25,530 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 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 [2020-12-21 21:39:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:25,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 21:39:25,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:39:25,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:25,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-21 21:39:25,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459391948] [2020-12-21 21:39:25,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:39:25,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:25,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:39:25,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:39:25,783 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand 41 states. [2020-12-21 21:39:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:25,926 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-12-21 21:39:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:39:25,927 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2020-12-21 21:39:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:25,928 INFO L225 Difference]: With dead ends: 200 [2020-12-21 21:39:25,929 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 21:39:25,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:39:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 21:39:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-21 21:39:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-21 21:39:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2020-12-21 21:39:25,934 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 134 [2020-12-21 21:39:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:25,934 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2020-12-21 21:39:25,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:39:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2020-12-21 21:39:25,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 21:39:25,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:25,936 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:26,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:39:26,149 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1881951387, now seen corresponding path program 38 times [2020-12-21 21:39:26,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:26,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803949390] [2020-12-21 21:39:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:39:27,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803949390] [2020-12-21 21:39:27,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176568426] [2020-12-21 21:39:27,231 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 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 [2020-12-21 21:39:27,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:27,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-21 21:39:27,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:39:27,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:27,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-21 21:39:27,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609787213] [2020-12-21 21:39:27,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 21:39:27,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 21:39:27,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:39:27,490 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand 42 states. [2020-12-21 21:39:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:27,667 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2020-12-21 21:39:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 21:39:27,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 136 [2020-12-21 21:39:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:27,674 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:39:27,674 INFO L226 Difference]: Without dead ends: 142 [2020-12-21 21:39:27,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:39:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-21 21:39:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-21 21:39:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-21 21:39:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2020-12-21 21:39:27,679 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 136 [2020-12-21 21:39:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:27,679 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2020-12-21 21:39:27,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 21:39:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2020-12-21 21:39:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 21:39:27,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:27,681 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:27,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:27,895 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:27,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1517117341, now seen corresponding path program 39 times [2020-12-21 21:39:27,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:27,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824041567] [2020-12-21 21:39:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:39:29,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824041567] [2020-12-21 21:39:29,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679133428] [2020-12-21 21:39:29,037 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 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 [2020-12-21 21:39:29,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-21 21:39:29,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:29,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:39:29,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-12-21 21:39:30,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:30,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 20] total 60 [2020-12-21 21:39:30,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028309795] [2020-12-21 21:39:30,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-21 21:39:30,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-21 21:39:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 21:39:30,183 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand 60 states. [2020-12-21 21:39:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:30,536 INFO L93 Difference]: Finished difference Result 209 states and 250 transitions. [2020-12-21 21:39:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-21 21:39:30,536 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2020-12-21 21:39:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:30,537 INFO L225 Difference]: With dead ends: 209 [2020-12-21 21:39:30,538 INFO L226 Difference]: Without dead ends: 149 [2020-12-21 21:39:30,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 21:39:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-21 21:39:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-12-21 21:39:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-21 21:39:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2020-12-21 21:39:30,547 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 138 [2020-12-21 21:39:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:30,547 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2020-12-21 21:39:30,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-21 21:39:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2020-12-21 21:39:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-21 21:39:30,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:30,549 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:30,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:30,763 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:30,764 INFO L82 PathProgramCache]: Analyzing trace with hash -159054874, now seen corresponding path program 40 times [2020-12-21 21:39:30,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:30,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225210371] [2020-12-21 21:39:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-21 21:39:31,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225210371] [2020-12-21 21:39:31,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181851520] [2020-12-21 21:39:31,918 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 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 [2020-12-21 21:39:32,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:32,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:39:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-12-21 21:39:32,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:32,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 21] total 62 [2020-12-21 21:39:32,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719644893] [2020-12-21 21:39:32,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-21 21:39:32,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-21 21:39:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2020-12-21 21:39:32,956 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand 62 states. [2020-12-21 21:39:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:33,274 INFO L93 Difference]: Finished difference Result 217 states and 260 transitions. [2020-12-21 21:39:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-21 21:39:33,274 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 143 [2020-12-21 21:39:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:33,276 INFO L225 Difference]: With dead ends: 217 [2020-12-21 21:39:33,276 INFO L226 Difference]: Without dead ends: 154 [2020-12-21 21:39:33,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2020-12-21 21:39:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-21 21:39:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-12-21 21:39:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 21:39:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2020-12-21 21:39:33,284 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 143 [2020-12-21 21:39:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:33,284 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2020-12-21 21:39:33,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-21 21:39:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2020-12-21 21:39:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-21 21:39:33,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:33,286 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:33,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-21 21:39:33,500 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1007793855, now seen corresponding path program 41 times [2020-12-21 21:39:33,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:33,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784357919] [2020-12-21 21:39:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-21 21:39:34,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784357919] [2020-12-21 21:39:34,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145499806] [2020-12-21 21:39:34,775 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 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 [2020-12-21 21:39:41,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-21 21:39:41,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 21:39:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-21 21:39:41,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:41,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-21 21:39:41,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436855421] [2020-12-21 21:39:41,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:39:41,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:39:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:39:41,717 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand 45 states. [2020-12-21 21:39:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:41,897 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2020-12-21 21:39:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 21:39:41,902 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 148 [2020-12-21 21:39:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:41,904 INFO L225 Difference]: With dead ends: 220 [2020-12-21 21:39:41,904 INFO L226 Difference]: Without dead ends: 154 [2020-12-21 21:39:41,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:39:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-21 21:39:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-21 21:39:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-21 21:39:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2020-12-21 21:39:41,909 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 148 [2020-12-21 21:39:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:41,909 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2020-12-21 21:39:41,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:39:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2020-12-21 21:39:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-21 21:39:41,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:41,910 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:42,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:42,124 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash -349116093, now seen corresponding path program 42 times [2020-12-21 21:39:42,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:42,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146567352] [2020-12-21 21:39:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-21 21:39:43,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146567352] [2020-12-21 21:39:43,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451984613] [2020-12-21 21:39:43,411 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 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 [2020-12-21 21:39:53,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-21 21:39:53,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:53,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:39:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-12-21 21:39:54,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:54,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 22] total 65 [2020-12-21 21:39:54,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002116062] [2020-12-21 21:39:54,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-21 21:39:54,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-21 21:39:54,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 21:39:54,270 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand 65 states. [2020-12-21 21:39:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:54,645 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2020-12-21 21:39:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-21 21:39:54,645 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 150 [2020-12-21 21:39:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:54,647 INFO L225 Difference]: With dead ends: 227 [2020-12-21 21:39:54,647 INFO L226 Difference]: Without dead ends: 161 [2020-12-21 21:39:54,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 21:39:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-21 21:39:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-12-21 21:39:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-21 21:39:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2020-12-21 21:39:54,653 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 150 [2020-12-21 21:39:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:54,653 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2020-12-21 21:39:54,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-21 21:39:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2020-12-21 21:39:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-21 21:39:54,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:54,654 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:54,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:54,867 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1604131968, now seen corresponding path program 43 times [2020-12-21 21:39:54,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:54,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110216729] [2020-12-21 21:39:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:39:56,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110216729] [2020-12-21 21:39:56,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554463551] [2020-12-21 21:39:56,189 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 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 [2020-12-21 21:39:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 21:39:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:39:56,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:56,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-21 21:39:56,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805408696] [2020-12-21 21:39:56,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:39:56,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:56,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:39:56,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:39:56,496 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 47 states. [2020-12-21 21:39:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:56,705 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2020-12-21 21:39:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:39:56,706 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 155 [2020-12-21 21:39:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:56,708 INFO L225 Difference]: With dead ends: 230 [2020-12-21 21:39:56,708 INFO L226 Difference]: Without dead ends: 161 [2020-12-21 21:39:56,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:39:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-21 21:39:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-12-21 21:39:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 21:39:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2020-12-21 21:39:56,714 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 155 [2020-12-21 21:39:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:56,714 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2020-12-21 21:39:56,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:39:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2020-12-21 21:39:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-21 21:39:56,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:56,716 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:56,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-21 21:39:56,929 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:56,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1230070466, now seen corresponding path program 44 times [2020-12-21 21:39:56,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:56,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640556998] [2020-12-21 21:39:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:39:58,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640556998] [2020-12-21 21:39:58,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785127303] [2020-12-21 21:39:58,261 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 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 [2020-12-21 21:39:58,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:58,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:58,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 21:39:58,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:39:58,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:58,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-21 21:39:58,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124414816] [2020-12-21 21:39:58,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:39:58,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:58,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:39:58,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:39:58,560 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand 48 states. [2020-12-21 21:39:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:58,735 INFO L93 Difference]: Finished difference Result 232 states and 276 transitions. [2020-12-21 21:39:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 21:39:58,736 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 157 [2020-12-21 21:39:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:58,737 INFO L225 Difference]: With dead ends: 232 [2020-12-21 21:39:58,738 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 21:39:58,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:39:58,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 21:39:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-12-21 21:39:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-21 21:39:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2020-12-21 21:39:58,743 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 157 [2020-12-21 21:39:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:58,743 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2020-12-21 21:39:58,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:39:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2020-12-21 21:39:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-21 21:39:58,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:58,744 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:58,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-21 21:39:58,960 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1760747388, now seen corresponding path program 45 times [2020-12-21 21:39:58,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:58,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257196102] [2020-12-21 21:39:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:40:00,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257196102] [2020-12-21 21:40:00,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291419573] [2020-12-21 21:40:00,461 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 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 [2020-12-21 21:40:01,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-21 21:40:01,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:40:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2020-12-21 21:40:02,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:02,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 23] total 69 [2020-12-21 21:40:02,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310437336] [2020-12-21 21:40:02,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-21 21:40:02,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:02,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-21 21:40:02,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 21:40:02,198 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 69 states. [2020-12-21 21:40:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:02,628 INFO L93 Difference]: Finished difference Result 239 states and 286 transitions. [2020-12-21 21:40:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-21 21:40:02,629 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 159 [2020-12-21 21:40:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:02,630 INFO L225 Difference]: With dead ends: 239 [2020-12-21 21:40:02,630 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 21:40:02,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 21:40:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 21:40:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-12-21 21:40:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-21 21:40:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2020-12-21 21:40:02,636 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 159 [2020-12-21 21:40:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:02,636 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2020-12-21 21:40:02,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-21 21:40:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2020-12-21 21:40:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-21 21:40:02,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:02,637 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:02,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-21 21:40:02,851 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:02,851 INFO L82 PathProgramCache]: Analyzing trace with hash 872774123, now seen corresponding path program 46 times [2020-12-21 21:40:02,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:02,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217660095] [2020-12-21 21:40:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-21 21:40:04,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217660095] [2020-12-21 21:40:04,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286099421] [2020-12-21 21:40:04,337 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 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 [2020-12-21 21:40:04,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:40:04,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:04,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:40:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-12-21 21:40:05,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:05,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 24] total 71 [2020-12-21 21:40:05,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879283222] [2020-12-21 21:40:05,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-21 21:40:05,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:05,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-21 21:40:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2020-12-21 21:40:05,660 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand 71 states. [2020-12-21 21:40:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:06,054 INFO L93 Difference]: Finished difference Result 247 states and 296 transitions. [2020-12-21 21:40:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-21 21:40:06,057 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 164 [2020-12-21 21:40:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:06,058 INFO L225 Difference]: With dead ends: 247 [2020-12-21 21:40:06,058 INFO L226 Difference]: Without dead ends: 175 [2020-12-21 21:40:06,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2020-12-21 21:40:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-21 21:40:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-12-21 21:40:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-21 21:40:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2020-12-21 21:40:06,064 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 164 [2020-12-21 21:40:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:06,064 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2020-12-21 21:40:06,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-21 21:40:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2020-12-21 21:40:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-21 21:40:06,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:06,065 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:06,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:06,276 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1899844264, now seen corresponding path program 47 times [2020-12-21 21:40:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:06,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341484513] [2020-12-21 21:40:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-21 21:40:07,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341484513] [2020-12-21 21:40:07,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710065242] [2020-12-21 21:40:07,802 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 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 [2020-12-21 21:41:16,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-21 21:41:16,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:41:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:41:17,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:41:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2020-12-21 21:41:18,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:41:18,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 25] total 73 [2020-12-21 21:41:18,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911810215] [2020-12-21 21:41:18,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-21 21:41:18,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:41:18,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-21 21:41:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=3732, Unknown=0, NotChecked=0, Total=5256 [2020-12-21 21:41:18,351 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 73 states. [2020-12-21 21:41:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:41:18,723 INFO L93 Difference]: Finished difference Result 255 states and 306 transitions. [2020-12-21 21:41:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-21 21:41:18,724 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 169 [2020-12-21 21:41:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:41:18,725 INFO L225 Difference]: With dead ends: 255 [2020-12-21 21:41:18,725 INFO L226 Difference]: Without dead ends: 180 [2020-12-21 21:41:18,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1524, Invalid=3732, Unknown=0, NotChecked=0, Total=5256 [2020-12-21 21:41:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-21 21:41:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-12-21 21:41:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-21 21:41:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 202 transitions. [2020-12-21 21:41:18,735 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 202 transitions. Word has length 169 [2020-12-21 21:41:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:41:18,736 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 202 transitions. [2020-12-21 21:41:18,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-21 21:41:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 202 transitions. [2020-12-21 21:41:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-21 21:41:18,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:41:18,737 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:41:18,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 21:41:18,951 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:41:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:41:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2102154255, now seen corresponding path program 48 times [2020-12-21 21:41:18,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:41:18,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597030425] [2020-12-21 21:41:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:41:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:41:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-21 21:41:20,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597030425] [2020-12-21 21:41:20,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27618834] [2020-12-21 21:41:20,563 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 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 [2020-12-21 21:42:16,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2020-12-21 21:42:16,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:42:16,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 95 proven. 782 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2020-12-21 21:42:17,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:17,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 28] total 77 [2020-12-21 21:42:17,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278088251] [2020-12-21 21:42:17,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-21 21:42:17,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:17,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-21 21:42:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1702, Invalid=4150, Unknown=0, NotChecked=0, Total=5852 [2020-12-21 21:42:17,745 INFO L87 Difference]: Start difference. First operand 177 states and 202 transitions. Second operand 77 states. [2020-12-21 21:42:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:19,716 INFO L93 Difference]: Finished difference Result 264 states and 318 transitions. [2020-12-21 21:42:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-21 21:42:19,717 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2020-12-21 21:42:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:19,718 INFO L225 Difference]: With dead ends: 264 [2020-12-21 21:42:19,718 INFO L226 Difference]: Without dead ends: 186 [2020-12-21 21:42:19,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2350, Invalid=7750, Unknown=0, NotChecked=0, Total=10100 [2020-12-21 21:42:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-21 21:42:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-12-21 21:42:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-21 21:42:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 210 transitions. [2020-12-21 21:42:19,725 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 210 transitions. Word has length 174 [2020-12-21 21:42:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:19,725 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 210 transitions. [2020-12-21 21:42:19,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-21 21:42:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 210 transitions. [2020-12-21 21:42:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-21 21:42:19,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:19,726 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:19,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:19,941 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:19,942 INFO L82 PathProgramCache]: Analyzing trace with hash 898464498, now seen corresponding path program 49 times [2020-12-21 21:42:19,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:19,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353875329] [2020-12-21 21:42:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3352 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:42:21,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353875329] [2020-12-21 21:42:21,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933491531] [2020-12-21 21:42:21,637 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 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 [2020-12-21 21:42:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-21 21:42:21,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3352 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:42:21,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:21,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-21 21:42:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118204596] [2020-12-21 21:42:21,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 21:42:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 21:42:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:42:22,001 INFO L87 Difference]: Start difference. First operand 184 states and 210 transitions. Second operand 54 states. [2020-12-21 21:42:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:22,227 INFO L93 Difference]: Finished difference Result 268 states and 320 transitions. [2020-12-21 21:42:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 21:42:22,228 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 181 [2020-12-21 21:42:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:22,228 INFO L225 Difference]: With dead ends: 268 [2020-12-21 21:42:22,229 INFO L226 Difference]: Without dead ends: 187 [2020-12-21 21:42:22,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:42:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-21 21:42:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-12-21 21:42:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-21 21:42:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2020-12-21 21:42:22,235 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 181 [2020-12-21 21:42:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:22,235 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2020-12-21 21:42:22,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 21:42:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2020-12-21 21:42:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-21 21:42:22,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:22,236 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:22,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:22,437 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash -748788944, now seen corresponding path program 50 times [2020-12-21 21:42:22,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:22,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942357445] [2020-12-21 21:42:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3453 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:42:24,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942357445] [2020-12-21 21:42:24,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147439715] [2020-12-21 21:42:24,382 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 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 [2020-12-21 21:42:24,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:42:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:24,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-21 21:42:24,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3453 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:42:24,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:24,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-21 21:42:24,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923687908] [2020-12-21 21:42:24,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 21:42:24,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:24,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 21:42:24,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 21:42:24,732 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand 55 states. [2020-12-21 21:42:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:24,934 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2020-12-21 21:42:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-21 21:42:24,941 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 183 [2020-12-21 21:42:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:24,942 INFO L225 Difference]: With dead ends: 270 [2020-12-21 21:42:24,942 INFO L226 Difference]: Without dead ends: 189 [2020-12-21 21:42:24,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 21:42:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-21 21:42:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-12-21 21:42:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-21 21:42:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2020-12-21 21:42:24,949 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 183 [2020-12-21 21:42:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:24,949 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2020-12-21 21:42:24,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-21 21:42:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2020-12-21 21:42:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-21 21:42:24,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:24,950 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:25,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-21 21:42:25,164 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:25,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1083585518, now seen corresponding path program 51 times [2020-12-21 21:42:25,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:25,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547358042] [2020-12-21 21:42:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:42:27,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547358042] [2020-12-21 21:42:27,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025306495] [2020-12-21 21:42:27,195 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 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 [2020-12-21 21:42:28,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-12-21 21:42:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:42:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2020-12-21 21:42:30,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:30,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 27] total 80 [2020-12-21 21:42:30,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668292959] [2020-12-21 21:42:30,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-21 21:42:30,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:30,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-21 21:42:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=4485, Unknown=0, NotChecked=0, Total=6320 [2020-12-21 21:42:30,110 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand 80 states. [2020-12-21 21:42:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:30,630 INFO L93 Difference]: Finished difference Result 277 states and 332 transitions. [2020-12-21 21:42:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-21 21:42:30,631 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 185 [2020-12-21 21:42:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:30,632 INFO L225 Difference]: With dead ends: 277 [2020-12-21 21:42:30,632 INFO L226 Difference]: Without dead ends: 196 [2020-12-21 21:42:30,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1835, Invalid=4485, Unknown=0, NotChecked=0, Total=6320 [2020-12-21 21:42:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-21 21:42:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2020-12-21 21:42:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-21 21:42:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2020-12-21 21:42:30,639 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 185 [2020-12-21 21:42:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:30,639 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2020-12-21 21:42:30,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-21 21:42:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2020-12-21 21:42:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-21 21:42:30,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:30,640 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:30,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:30,851 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1956185671, now seen corresponding path program 52 times [2020-12-21 21:42:30,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:30,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049856916] [2020-12-21 21:42:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3734 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-12-21 21:42:32,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049856916] [2020-12-21 21:42:32,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449415004] [2020-12-21 21:42:32,881 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 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 [2020-12-21 21:42:33,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:42:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:33,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-21 21:42:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3734 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-12-21 21:42:33,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:33,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-21 21:42:33,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948314571] [2020-12-21 21:42:33,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-21 21:42:33,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-21 21:42:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 21:42:33,290 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand 57 states. [2020-12-21 21:42:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:33,536 INFO L93 Difference]: Finished difference Result 280 states and 334 transitions. [2020-12-21 21:42:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-21 21:42:33,537 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 190 [2020-12-21 21:42:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:33,538 INFO L225 Difference]: With dead ends: 280 [2020-12-21 21:42:33,538 INFO L226 Difference]: Without dead ends: 196 [2020-12-21 21:42:33,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 21:42:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-21 21:42:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-12-21 21:42:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 21:42:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2020-12-21 21:42:33,545 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 190 [2020-12-21 21:42:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:33,546 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2020-12-21 21:42:33,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-21 21:42:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2020-12-21 21:42:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-21 21:42:33,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:33,547 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:33,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-21 21:42:33,760 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash 803501883, now seen corresponding path program 53 times [2020-12-21 21:42:33,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:33,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070298564] [2020-12-21 21:42:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-12-21 21:42:35,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070298564] [2020-12-21 21:42:35,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695882262] [2020-12-21 21:42:35,738 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 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