/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:22:01,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:22:01,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:22:01,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:22:01,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:22:01,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:22:01,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:22:01,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:22:01,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:22:01,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:22:01,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:22:01,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:22:01,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:22:01,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:22:01,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:22:01,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:22:01,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:22:01,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:22:01,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:22:01,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:22:01,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:22:01,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:22:01,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:22:01,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:22:01,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:22:01,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:22:01,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:22:01,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:22:01,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:22:01,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:22:01,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:22:01,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:22:01,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:22:01,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:22:01,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:22:01,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:22:01,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:22:01,590 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:22:01,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:22:01,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:22:01,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:22:01,592 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:22:01,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:22:01,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:22:01,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:22:01,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:22:01,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:22:01,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:22:01,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:22:01,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:22:01,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:22:01,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:22:01,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:22:01,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:22:01,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:22:01,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:22:01,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:22:01,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:22:01,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:22:01,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:22:01,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:22:01,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:22:01,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:22:02,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:22:02,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:22:02,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:22:02,045 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:22:02,046 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:22:02,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2020-12-22 04:22:02,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf7d4cc53/f4b65efe20a74c0493eb1b1da7d6e6d1/FLAG0200d97a9 [2020-12-22 04:22:02,748 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:22:02,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2020-12-22 04:22:02,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf7d4cc53/f4b65efe20a74c0493eb1b1da7d6e6d1/FLAG0200d97a9 [2020-12-22 04:22:03,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf7d4cc53/f4b65efe20a74c0493eb1b1da7d6e6d1 [2020-12-22 04:22:03,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:22:03,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:22:03,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:22:03,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:22:03,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:22:03,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5870de56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03, skipping insertion in model container [2020-12-22 04:22:03,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:22:03,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:22:03,325 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2020-12-22 04:22:03,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:22:03,356 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:22:03,371 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2020-12-22 04:22:03,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:22:03,397 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:22:03,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03 WrapperNode [2020-12-22 04:22:03,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:22:03,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:22:03,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:22:03,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:22:03,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:22:03,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:22:03,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:22:03,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:22:03,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... [2020-12-22 04:22:03,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:22:03,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:22:03,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:22:03,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:22:03,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:22:03,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:22:03,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 04:22:03,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:22:03,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:22:03,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:22:03,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:22:03,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:22:03,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:22:03,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:22:03,970 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:22:03,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:22:03 BoogieIcfgContainer [2020-12-22 04:22:03,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:22:03,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:22:03,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:22:04,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:22:04,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:22:03" (1/3) ... [2020-12-22 04:22:04,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67841797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:22:04, skipping insertion in model container [2020-12-22 04:22:04,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:03" (2/3) ... [2020-12-22 04:22:04,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67841797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:22:04, skipping insertion in model container [2020-12-22 04:22:04,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:22:03" (3/3) ... [2020-12-22 04:22:04,021 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2020-12-22 04:22:04,034 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:22:04,064 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:22:04,093 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:22:04,120 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:22:04,121 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:22:04,121 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:22:04,121 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:22:04,121 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:22:04,121 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:22:04,122 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:22:04,122 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:22:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 04:22:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:22:04,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:04,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:22:04,143 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:04,150 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-12-22 04:22:04,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:04,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385240181] [2020-12-22 04:22:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:04,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385240181] [2020-12-22 04:22:04,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:04,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:22:04,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129789190] [2020-12-22 04:22:04,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:22:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:04,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:22:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:22:04,415 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-22 04:22:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:04,493 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-22 04:22:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:22:04,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:22:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:04,520 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:22:04,520 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:22:04,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:22:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:22:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-22 04:22:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:22:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:22:04,559 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-22 04:22:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:04,559 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:22:04,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:22:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:22:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:22:04,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:04,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:04,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:22:04,561 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-12-22 04:22:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:04,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856534517] [2020-12-22 04:22:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:04,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856534517] [2020-12-22 04:22:04,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979051024] [2020-12-22 04:22:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:22:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:04,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:04,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:22:04,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504539426] [2020-12-22 04:22:04,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:22:04,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:22:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:04,815 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-22 04:22:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:04,849 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:22:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:22:04,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:22:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:04,851 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:22:04,851 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:22:04,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:22:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-22 04:22:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:22:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:22:04,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-22 04:22:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:04,856 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:22:04,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:22:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:22:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:22:04,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:04,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:05,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:22:05,071 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:05,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-12-22 04:22:05,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:05,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097499122] [2020-12-22 04:22:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:05,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097499122] [2020-12-22 04:22:05,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954783340] [2020-12-22 04:22:05,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:05,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:22:05,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:05,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:05,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:22:05,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618336570] [2020-12-22 04:22:05,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:22:05,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:22:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:22:05,270 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-22 04:22:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:05,306 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:22:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:22:05,308 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:22:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:05,308 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:22:05,309 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:22:05,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:22:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:22:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-22 04:22:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:22:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:22:05,314 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-22 04:22:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:05,314 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:22:05,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:22:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:22:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:22:05,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:05,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:05,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:05,530 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:05,532 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-12-22 04:22:05,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:05,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365213175] [2020-12-22 04:22:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:05,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365213175] [2020-12-22 04:22:05,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414196600] [2020-12-22 04:22:05,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:05,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:22:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:05,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:22:05,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:05,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:05,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:22:05,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783215126] [2020-12-22 04:22:05,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:22:05,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:05,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:22:05,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:22:05,774 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-12-22 04:22:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:05,815 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:22:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:22:05,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 04:22:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:05,817 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:22:05,817 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:22:05,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:22:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:22:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:22:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:22:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:22:05,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-22 04:22:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:05,823 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:22:05,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:22:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:22:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:22:05,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:05,824 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:06,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:06,053 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:06,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2020-12-22 04:22:06,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:06,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656199490] [2020-12-22 04:22:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:06,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656199490] [2020-12-22 04:22:06,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055630606] [2020-12-22 04:22:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:06,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:06,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:06,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:22:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:06,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:06,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:22:06,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39486968] [2020-12-22 04:22:06,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:22:06,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:06,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:22:06,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:22:06,305 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-12-22 04:22:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:06,347 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:22:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:22:06,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 04:22:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:06,349 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:22:06,349 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:22:06,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:22:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:22:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 04:22:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:22:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:22:06,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-22 04:22:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:06,355 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:22:06,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:22:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:22:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:22:06,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:06,356 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:06,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:06,570 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2020-12-22 04:22:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:06,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712142770] [2020-12-22 04:22:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:06,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712142770] [2020-12-22 04:22:06,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654440190] [2020-12-22 04:22:06,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:06,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:22:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:22:06,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:06,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:06,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:22:06,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672860352] [2020-12-22 04:22:06,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:22:06,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:22:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:06,855 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-12-22 04:22:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:06,911 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:22:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:22:06,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:22:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:06,912 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:22:06,913 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:22:06,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:22:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:22:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:22:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:22:06,918 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-22 04:22:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:06,918 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:22:06,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:22:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:22:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:22:06,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:06,919 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:07,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:22:07,134 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2020-12-22 04:22:07,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:07,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814782854] [2020-12-22 04:22:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814782854] [2020-12-22 04:22:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569080243] [2020-12-22 04:22:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:07,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:22:07,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:22:07,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:07,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:07,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:22:07,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926579284] [2020-12-22 04:22:07,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:22:07,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:22:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:22:07,436 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-12-22 04:22:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:07,494 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:22:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:22:07,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:22:07,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:07,496 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:22:07,496 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:22:07,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:22:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:22:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-22 04:22:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:22:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:22:07,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-22 04:22:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:07,502 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:22:07,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:22:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:22:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:22:07,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:07,503 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:07,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:07,718 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2020-12-22 04:22:07,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:07,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486140260] [2020-12-22 04:22:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:07,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486140260] [2020-12-22 04:22:07,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029161150] [2020-12-22 04:22:07,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:07,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:22:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:08,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:08,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:22:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965935997] [2020-12-22 04:22:08,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:22:08,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:22:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:22:08,043 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-12-22 04:22:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:08,102 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:22:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:22:08,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-22 04:22:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:08,104 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:22:08,104 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:22:08,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:22:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:22:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 04:22:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:22:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:22:08,110 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-22 04:22:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:08,110 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:22:08,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:22:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:22:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:22:08,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:08,111 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:08,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:08,326 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:08,328 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2020-12-22 04:22:08,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:08,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710701640] [2020-12-22 04:22:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:08,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710701640] [2020-12-22 04:22:08,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781581320] [2020-12-22 04:22:08,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:08,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:08,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:08,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:22:08,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:08,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:08,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:22:08,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106365580] [2020-12-22 04:22:08,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:22:08,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:22:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:22:08,582 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-12-22 04:22:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:08,631 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:22:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:22:08,632 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-22 04:22:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:08,632 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:22:08,633 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:22:08,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:22:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:22:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-22 04:22:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:22:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:22:08,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-22 04:22:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:08,638 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:22:08,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:22:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:22:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:22:08,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:08,639 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:08,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:22:08,854 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2020-12-22 04:22:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:08,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698275054] [2020-12-22 04:22:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698275054] [2020-12-22 04:22:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251024715] [2020-12-22 04:22:09,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:09,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:22:09,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:09,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:22:09,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:09,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:09,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:22:09,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346606741] [2020-12-22 04:22:09,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:22:09,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:09,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:22:09,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:22:09,212 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-12-22 04:22:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:09,274 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:22:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:22:09,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-22 04:22:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:09,278 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:22:09,278 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:22:09,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:22:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:22:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 04:22:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:22:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:22:09,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-22 04:22:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:09,290 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:22:09,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:22:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:22:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:22:09,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:09,292 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:09,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:09,508 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2020-12-22 04:22:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:09,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968725811] [2020-12-22 04:22:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:09,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968725811] [2020-12-22 04:22:09,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047910246] [2020-12-22 04:22:09,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:09,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:09,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:09,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:22:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:09,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:09,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:22:09,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191789623] [2020-12-22 04:22:09,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:22:09,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:22:09,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:22:09,773 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-12-22 04:22:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:09,826 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:22:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:22:09,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-22 04:22:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:09,827 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:22:09,827 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:22:09,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:22:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:22:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 04:22:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:22:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:22:09,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-22 04:22:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:09,832 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:22:09,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:22:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:22:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:22:09,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:09,833 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:10,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:10,049 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:10,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2020-12-22 04:22:10,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:10,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512556777] [2020-12-22 04:22:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:10,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512556777] [2020-12-22 04:22:10,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372540488] [2020-12-22 04:22:10,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:10,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:22:10,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:22:10,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:10,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:10,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:22:10,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637556306] [2020-12-22 04:22:10,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:22:10,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:22:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:22:10,472 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-12-22 04:22:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:10,542 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:22:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:22:10,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-22 04:22:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:10,544 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:22:10,544 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:22:10,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:22:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:22:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 04:22:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:22:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:22:10,558 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-22 04:22:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:10,558 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:22:10,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:22:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:22:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:22:10,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:10,562 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:10,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:22:10,768 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:10,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2020-12-22 04:22:10,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:10,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260862289] [2020-12-22 04:22:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:10,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260862289] [2020-12-22 04:22:10,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880992742] [2020-12-22 04:22:10,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:11,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:22:11,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:22:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:11,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:11,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:22:11,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651766194] [2020-12-22 04:22:11,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:22:11,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:11,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:22:11,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:22:11,325 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-12-22 04:22:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:11,380 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:22:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:22:11,381 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:22:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:11,381 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:22:11,382 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:22:11,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:22:11,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:22:11,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 04:22:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:22:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:22:11,386 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-22 04:22:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:11,387 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:22:11,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:22:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:22:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:22:11,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:11,387 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:11,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:22:11,600 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2020-12-22 04:22:11,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:11,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030858798] [2020-12-22 04:22:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:11,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030858798] [2020-12-22 04:22:11,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855664253] [2020-12-22 04:22:11,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:22:11,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:11,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:11,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:22:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330041602] [2020-12-22 04:22:11,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:22:11,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:22:11,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:22:11,948 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-12-22 04:22:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:12,003 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:22:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:22:12,003 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:22:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:12,004 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:22:12,004 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:22:12,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:22:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:22:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 04:22:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:22:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:22:12,009 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-22 04:22:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:12,009 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:22:12,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:22:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:22:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:22:12,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:12,010 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:12,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:22:12,226 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2020-12-22 04:22:12,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:12,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701048965] [2020-12-22 04:22:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:12,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701048965] [2020-12-22 04:22:12,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665204606] [2020-12-22 04:22:12,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:12,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:22:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:12,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:12,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:22:12,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656058061] [2020-12-22 04:22:12,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:22:12,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:12,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:22:12,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:22:12,615 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-12-22 04:22:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:12,694 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:22:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:22:12,694 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-22 04:22:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:12,697 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:22:12,697 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:22:12,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:22:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:22:12,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 04:22:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:22:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:22:12,704 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-22 04:22:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:12,705 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:22:12,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:22:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:22:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:22:12,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:12,705 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:12,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:12,920 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:12,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2020-12-22 04:22:12,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:12,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250889996] [2020-12-22 04:22:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250889996] [2020-12-22 04:22:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506777991] [2020-12-22 04:22:13,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:13,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:22:13,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:22:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:13,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:13,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:22:13,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179945208] [2020-12-22 04:22:13,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:22:13,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:22:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:22:13,441 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-12-22 04:22:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:13,502 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:22:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:22:13,502 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-22 04:22:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:13,503 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:22:13,503 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:22:13,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:22:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:22:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 04:22:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:22:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:22:13,520 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-22 04:22:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:13,522 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:22:13,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:22:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:22:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:22:13,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:13,523 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:13,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:22:13,741 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2020-12-22 04:22:13,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:13,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725806578] [2020-12-22 04:22:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:13,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725806578] [2020-12-22 04:22:13,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429730022] [2020-12-22 04:22:13,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:14,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:14,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:22:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:14,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:22:14,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933714933] [2020-12-22 04:22:14,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:22:14,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:22:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:22:14,119 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2020-12-22 04:22:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,193 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:22:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:22:14,194 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-22 04:22:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,194 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:22:14,194 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:22:14,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:22:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:22:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:22:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:22:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:22:14,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-22 04:22:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,200 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:22:14,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:22:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:22:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:22:14,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,201 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:14,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:22:14,416 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2020-12-22 04:22:14,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:14,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641629120] [2020-12-22 04:22:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641629120] [2020-12-22 04:22:14,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662615265] [2020-12-22 04:22:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:14,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:22:14,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:22:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:14,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:22:14,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137878379] [2020-12-22 04:22:14,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:22:14,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:22:14,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:22:14,916 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-12-22 04:22:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,984 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:22:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:22:14,985 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:22:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,985 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:22:14,985 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:22:14,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:22:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:22:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 04:22:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:22:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:22:14,990 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-22 04:22:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,990 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:22:14,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:22:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:22:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:22:14,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,991 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:15,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:22:15,205 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:15,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2020-12-22 04:22:15,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:15,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033374939] [2020-12-22 04:22:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:15,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033374939] [2020-12-22 04:22:15,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343923557] [2020-12-22 04:22:15,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:15,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:22:15,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:15,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:22:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:16,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:16,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:22:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70352307] [2020-12-22 04:22:16,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:22:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:22:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:22:16,064 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-12-22 04:22:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:16,138 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:22:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:22:16,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-22 04:22:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:16,140 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:22:16,140 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:22:16,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:22:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:22:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-22 04:22:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:22:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:22:16,152 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-22 04:22:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:16,152 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:22:16,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:22:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:22:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:22:16,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:16,153 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:16,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:16,362 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:16,363 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2020-12-22 04:22:16,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:16,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815323263] [2020-12-22 04:22:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815323263] [2020-12-22 04:22:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278263327] [2020-12-22 04:22:16,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:22:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:16,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:16,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:22:16,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607010298] [2020-12-22 04:22:16,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:22:16,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:16,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:22:16,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:22:16,814 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-12-22 04:22:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:16,890 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:22:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:22:16,890 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-22 04:22:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:16,891 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:22:16,891 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:22:16,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:22:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:22:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:22:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:22:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:22:16,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-22 04:22:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:16,895 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:22:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:22:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:22:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:22:16,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:16,896 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:17,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:17,112 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2020-12-22 04:22:17,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:17,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443210011] [2020-12-22 04:22:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:17,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443210011] [2020-12-22 04:22:17,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038367773] [2020-12-22 04:22:17,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:17,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:17,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:22:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:17,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:17,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:22:17,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203251874] [2020-12-22 04:22:17,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:22:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:22:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:22:17,600 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-12-22 04:22:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:17,697 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:22:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:22:17,697 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:22:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:17,698 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:22:17,698 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:22:17,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:22:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:22:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:22:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:22:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:22:17,702 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-22 04:22:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:17,703 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:22:17,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:22:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:22:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:22:17,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:17,703 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:17,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:22:17,919 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2020-12-22 04:22:17,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:17,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409945925] [2020-12-22 04:22:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409945925] [2020-12-22 04:22:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905499275] [2020-12-22 04:22:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:18,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:22:18,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:22:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:18,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:18,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:22:18,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187795511] [2020-12-22 04:22:18,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:22:18,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:18,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:22:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:22:18,664 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-12-22 04:22:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:18,743 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:22:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:22:18,746 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:22:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:18,747 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:22:18,747 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:22:18,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:22:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:22:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 04:22:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:22:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:22:18,751 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-22 04:22:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:18,751 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:22:18,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:22:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:22:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:22:18,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:18,752 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:18,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:22:18,968 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:18,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2020-12-22 04:22:18,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:18,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119029644] [2020-12-22 04:22:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:19,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119029644] [2020-12-22 04:22:19,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713128894] [2020-12-22 04:22:19,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:19,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:19,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:22:19,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:19,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:19,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:22:19,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697527281] [2020-12-22 04:22:19,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:22:19,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:19,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:22:19,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:22:19,539 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2020-12-22 04:22:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:19,627 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:22:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:22:19,628 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-22 04:22:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:19,629 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:22:19,630 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:22:19,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:22:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:22:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 04:22:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:22:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:22:19,634 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-22 04:22:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:19,635 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:22:19,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:22:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:22:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:22:19,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:19,635 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:19,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:19,849 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:19,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:19,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2020-12-22 04:22:19,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:19,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334684775] [2020-12-22 04:22:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:20,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334684775] [2020-12-22 04:22:20,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583590658] [2020-12-22 04:22:20,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:20,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:22:20,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:20,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:22:20,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:20,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:20,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:22:20,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388763611] [2020-12-22 04:22:20,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:22:20,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:22:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:22:20,743 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-12-22 04:22:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:20,834 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:22:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:22:20,835 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-22 04:22:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:20,836 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:22:20,836 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:22:20,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:22:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:22:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 04:22:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:22:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:22:20,839 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-22 04:22:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:20,839 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:22:20,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:22:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:22:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:22:20,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:20,840 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:21,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:22:21,054 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2020-12-22 04:22:21,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:21,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692932540] [2020-12-22 04:22:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:21,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692932540] [2020-12-22 04:22:21,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108690765] [2020-12-22 04:22:21,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:23,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:22:23,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:23,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:22:23,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:24,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:24,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:22:24,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058704132] [2020-12-22 04:22:24,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:22:24,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:22:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:22:24,082 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-12-22 04:22:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:24,172 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:22:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:22:24,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-22 04:22:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:24,174 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:22:24,174 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:22:24,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:22:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:22:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-22 04:22:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:22:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-22 04:22:24,177 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-22 04:22:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:24,177 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-22 04:22:24,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:22:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-22 04:22:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:22:24,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:24,178 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:24,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:24,392 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2020-12-22 04:22:24,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:24,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023380919] [2020-12-22 04:22:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:24,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023380919] [2020-12-22 04:22:24,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782296654] [2020-12-22 04:22:24,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:22:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:25,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:25,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:22:25,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80715447] [2020-12-22 04:22:25,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:22:25,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:25,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:22:25,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:22:25,096 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-12-22 04:22:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:25,197 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:22:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:22:25,198 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-22 04:22:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:25,199 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:22:25,199 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:22:25,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:22:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:22:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:22:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:22:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 04:22:25,204 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-22 04:22:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:25,204 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 04:22:25,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:22:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 04:22:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:22:25,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:25,205 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:25,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:22:25,419 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:25,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2020-12-22 04:22:25,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:25,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514668958] [2020-12-22 04:22:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:25,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514668958] [2020-12-22 04:22:25,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647774394] [2020-12-22 04:22:25,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:26,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:26,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:26,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:22:26,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:26,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:26,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:22:26,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032057587] [2020-12-22 04:22:26,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:22:26,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:22:26,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:22:26,171 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-12-22 04:22:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:26,262 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:22:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:22:26,263 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-22 04:22:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:26,264 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:22:26,264 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:22:26,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:22:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:22:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 04:22:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:22:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-22 04:22:26,267 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-22 04:22:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:26,268 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-22 04:22:26,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:22:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-22 04:22:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:22:26,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:26,268 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:26,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:22:26,484 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2020-12-22 04:22:26,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:26,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259582063] [2020-12-22 04:22:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:27,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259582063] [2020-12-22 04:22:27,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682718021] [2020-12-22 04:22:27,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:27,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:22:27,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:22:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:27,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:27,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:22:27,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572228810] [2020-12-22 04:22:27,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:22:27,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:27,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:22:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:22:27,787 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-12-22 04:22:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:27,897 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:22:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:22:27,898 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-22 04:22:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:27,899 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:22:27,899 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:22:27,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:22:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:22:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 04:22:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:22:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-22 04:22:27,903 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-22 04:22:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:27,903 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-22 04:22:27,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:22:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-22 04:22:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:22:27,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:27,904 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:28,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:22:28,120 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:28,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2020-12-22 04:22:28,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:28,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435756216] [2020-12-22 04:22:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:28,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435756216] [2020-12-22 04:22:28,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923745571] [2020-12-22 04:22:28,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:28,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:28,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:22:28,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:28,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:28,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:22:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422408075] [2020-12-22 04:22:28,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:22:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:22:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:22:28,912 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2020-12-22 04:22:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:29,018 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:22:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:22:29,019 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-22 04:22:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:29,019 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:22:29,019 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:22:29,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:22:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:22:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-22 04:22:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:22:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-22 04:22:29,026 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-22 04:22:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:29,026 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-22 04:22:29,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:22:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-22 04:22:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:22:29,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:29,027 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:29,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:22:29,242 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2020-12-22 04:22:29,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:29,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79083380] [2020-12-22 04:22:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:29,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79083380] [2020-12-22 04:22:29,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053665794] [2020-12-22 04:22:29,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:31,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:22:31,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:31,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:22:31,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:31,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:31,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:22:31,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944483006] [2020-12-22 04:22:31,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:22:31,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:22:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:22:31,268 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-12-22 04:22:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:31,392 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-22 04:22:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:22:31,393 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:22:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:31,394 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:22:31,394 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:22:31,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:22:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:22:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:22:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:22:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 04:22:31,398 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-22 04:22:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:31,399 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 04:22:31,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:22:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 04:22:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:22:31,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:31,400 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:31,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:31,615 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2020-12-22 04:22:31,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:31,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610257500] [2020-12-22 04:22:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:32,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610257500] [2020-12-22 04:22:32,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115012822] [2020-12-22 04:22:32,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:36,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:22:36,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:36,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:22:36,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:37,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:37,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:22:37,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838373161] [2020-12-22 04:22:37,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:22:37,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:37,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:22:37,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:22:37,013 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-12-22 04:22:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:37,126 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-22 04:22:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:22:37,127 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-22 04:22:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:37,128 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:22:37,128 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:22:37,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:22:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:22:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-22 04:22:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:22:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-22 04:22:37,131 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-22 04:22:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:37,132 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-22 04:22:37,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:22:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-22 04:22:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:22:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:37,133 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:37,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:37,347 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2020-12-22 04:22:37,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:37,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089155961] [2020-12-22 04:22:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:37,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089155961] [2020-12-22 04:22:37,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040374479] [2020-12-22 04:22:37,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:22:38,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:38,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:38,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:22:38,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191601299] [2020-12-22 04:22:38,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:22:38,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:22:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:22:38,179 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-12-22 04:22:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:38,306 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-22 04:22:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:22:38,307 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-22 04:22:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:38,308 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:22:38,308 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:22:38,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:22:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:22:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 04:22:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:22:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-22 04:22:38,312 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-22 04:22:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:38,312 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-22 04:22:38,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:22:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-22 04:22:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:22:38,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:38,313 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:38,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:38,527 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:38,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:38,527 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2020-12-22 04:22:38,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:38,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392287207] [2020-12-22 04:22:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:39,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392287207] [2020-12-22 04:22:39,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565693163] [2020-12-22 04:22:39,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:39,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:39,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:22:39,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:39,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:39,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:22:39,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114048280] [2020-12-22 04:22:39,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:22:39,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:39,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:22:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:22:39,489 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-12-22 04:22:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:39,634 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 04:22:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:22:39,635 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-22 04:22:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:39,636 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:22:39,636 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:22:39,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:22:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:22:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 04:22:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:22:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-22 04:22:39,640 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-22 04:22:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:39,640 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-22 04:22:39,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:22:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-22 04:22:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:22:39,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:39,641 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:39,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:22:39,855 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:39,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2020-12-22 04:22:39,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:39,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157349739] [2020-12-22 04:22:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:40,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157349739] [2020-12-22 04:22:40,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599690392] [2020-12-22 04:22:40,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:41,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:22:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:22:41,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:41,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:41,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:22:41,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134779120] [2020-12-22 04:22:41,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:22:41,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:41,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:22:41,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:22:41,699 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-12-22 04:22:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:41,870 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-22 04:22:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:22:41,871 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-22 04:22:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:41,872 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:22:41,872 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:22:41,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:22:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:22:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-22 04:22:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:22:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-22 04:22:41,876 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-22 04:22:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:41,876 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-22 04:22:41,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:22:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-22 04:22:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:22:41,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:41,877 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:42,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:42,091 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2020-12-22 04:22:42,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:42,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465772939] [2020-12-22 04:22:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:42,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465772939] [2020-12-22 04:22:42,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755070053] [2020-12-22 04:22:42,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:42,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:42,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:42,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:22:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:43,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:43,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:22:43,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304564398] [2020-12-22 04:22:43,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:22:43,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:22:43,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:22:43,055 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2020-12-22 04:22:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:43,180 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-22 04:22:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:22:43,181 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-22 04:22:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:43,182 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:22:43,182 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:22:43,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:22:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:22:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-22 04:22:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:22:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-22 04:22:43,186 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-22 04:22:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:43,187 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-22 04:22:43,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:22:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-22 04:22:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:22:43,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:43,188 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:43,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:22:43,403 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:43,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2020-12-22 04:22:43,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:43,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346372620] [2020-12-22 04:22:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:44,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346372620] [2020-12-22 04:22:44,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204520195] [2020-12-22 04:22:44,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:46,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:22:46,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:46,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:22:46,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:46,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:46,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:22:46,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960977161] [2020-12-22 04:22:46,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:22:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:46,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:22:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:22:46,521 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-12-22 04:22:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:46,667 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-22 04:22:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:22:46,668 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-22 04:22:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:46,669 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:22:46,669 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:22:46,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:22:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:22:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-22 04:22:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:22:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-22 04:22:46,674 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-12-22 04:22:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:46,675 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-22 04:22:46,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:22:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-22 04:22:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:22:46,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:46,676 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:46,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:46,891 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2020-12-22 04:22:46,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:46,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601171187] [2020-12-22 04:22:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:47,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601171187] [2020-12-22 04:22:47,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853443321] [2020-12-22 04:22:47,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:58,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:22:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:58,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:22:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:58,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:58,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:22:58,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468578321] [2020-12-22 04:22:58,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:22:58,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:22:58,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:22:58,747 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2020-12-22 04:22:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:58,889 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-22 04:22:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:22:58,890 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:22:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:58,890 INFO L225 Difference]: With dead ends: 86 [2020-12-22 04:22:58,891 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:22:58,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:22:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:22:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-22 04:22:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:22:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-22 04:22:58,894 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-12-22 04:22:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:58,895 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-22 04:22:58,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:22:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-22 04:22:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:22:58,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:58,895 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:59,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:22:59,096 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2020-12-22 04:22:59,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:59,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949335332] [2020-12-22 04:22:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:00,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949335332] [2020-12-22 04:23:00,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408634018] [2020-12-22 04:23:00,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:23:00,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:00,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:00,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:23:00,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511276759] [2020-12-22 04:23:00,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:23:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:00,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:23:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:23:00,260 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-12-22 04:23:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:00,439 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-22 04:23:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:23:00,440 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:23:00,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:00,441 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:23:00,441 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 04:23:00,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:23:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 04:23:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-22 04:23:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:23:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-22 04:23:00,447 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-12-22 04:23:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:00,448 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-22 04:23:00,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:23:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-22 04:23:00,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 04:23:00,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:00,448 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:00,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:23:00,661 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:00,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2020-12-22 04:23:00,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:00,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323596743] [2020-12-22 04:23:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:01,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323596743] [2020-12-22 04:23:01,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019423656] [2020-12-22 04:23:01,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:01,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:01,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:23:01,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:01,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:01,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:23:01,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979459242] [2020-12-22 04:23:01,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:23:01,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:01,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:23:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:23:01,963 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-12-22 04:23:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:02,120 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-22 04:23:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:23:02,121 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-22 04:23:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:02,123 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:23:02,123 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:23:02,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:23:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:23:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-22 04:23:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:23:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-22 04:23:02,128 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-12-22 04:23:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:02,128 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-22 04:23:02,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:23:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-22 04:23:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:23:02,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:02,131 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:02,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:23:02,346 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:02,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2020-12-22 04:23:02,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:02,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311213935] [2020-12-22 04:23:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:03,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311213935] [2020-12-22 04:23:03,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709394695] [2020-12-22 04:23:03,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:05,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 04:23:05,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:05,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:23:05,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:05,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:05,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:23:05,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936879153] [2020-12-22 04:23:05,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:23:05,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:05,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:23:05,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:23:05,396 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-12-22 04:23:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:05,575 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-22 04:23:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:23:05,580 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-12-22 04:23:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:05,580 INFO L225 Difference]: With dead ends: 92 [2020-12-22 04:23:05,581 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:23:05,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:23:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:23:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-22 04:23:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:23:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-22 04:23:05,590 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-12-22 04:23:05,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:05,590 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-22 04:23:05,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:23:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-22 04:23:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:23:05,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:05,591 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:05,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:23:05,807 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:05,807 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2020-12-22 04:23:05,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:05,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564774557] [2020-12-22 04:23:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:06,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564774557] [2020-12-22 04:23:06,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139002436] [2020-12-22 04:23:06,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:07,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:07,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:07,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:23:07,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:07,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:07,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:23:07,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767539509] [2020-12-22 04:23:07,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:23:07,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:23:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:23:07,153 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2020-12-22 04:23:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:07,325 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-22 04:23:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:23:07,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2020-12-22 04:23:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:07,327 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:23:07,327 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:23:07,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:23:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:23:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-22 04:23:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 04:23:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-22 04:23:07,334 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-12-22 04:23:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:07,334 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-22 04:23:07,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:23:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-22 04:23:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:23:07,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:07,335 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:07,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:07,536 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2020-12-22 04:23:07,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:07,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903358852] [2020-12-22 04:23:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:08,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903358852] [2020-12-22 04:23:08,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624111404] [2020-12-22 04:23:08,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:53,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 04:23:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:23:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:53,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:53,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:23:53,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404179065] [2020-12-22 04:23:53,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:23:53,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:23:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:23:53,643 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-12-22 04:23:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:53,846 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-22 04:23:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:23:53,847 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-12-22 04:23:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:53,848 INFO L225 Difference]: With dead ends: 96 [2020-12-22 04:23:53,848 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 04:23:53,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:23:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 04:23:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-22 04:23:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:23:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-22 04:23:53,853 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-12-22 04:23:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:53,853 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-22 04:23:53,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:23:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-22 04:23:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 04:23:53,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:53,854 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:54,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 04:23:54,055 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2020-12-22 04:23:54,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:54,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945419264] [2020-12-22 04:23:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:55,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945419264] [2020-12-22 04:23:55,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822419684] [2020-12-22 04:23:55,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:22,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 04:24:22,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:24:22,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:22,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:22,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:24:22,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718581382] [2020-12-22 04:24:22,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:24:22,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:24:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:24:22,355 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2020-12-22 04:24:22,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:22,572 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-12-22 04:24:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:24:22,572 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2020-12-22 04:24:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:22,573 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:24:22,573 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 04:24:22,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:24:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 04:24:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-22 04:24:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 04:24:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-12-22 04:24:22,579 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-12-22 04:24:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:22,580 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-12-22 04:24:22,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:24:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-12-22 04:24:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:24:22,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:22,581 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:22,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:22,793 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:22,794 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2020-12-22 04:24:22,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:22,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408323335] [2020-12-22 04:24:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:24,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408323335] [2020-12-22 04:24:24,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741692242] [2020-12-22 04:24:24,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:24:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:24,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:24,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:24:24,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793799704] [2020-12-22 04:24:24,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:24:24,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:24,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:24:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:24:24,308 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2020-12-22 04:24:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:24,487 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-12-22 04:24:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:24:24,488 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-12-22 04:24:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:24,489 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:24:24,489 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:24:24,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:24:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:24:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-22 04:24:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:24:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-12-22 04:24:24,493 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-12-22 04:24:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:24,494 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-12-22 04:24:24,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:24:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-12-22 04:24:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:24:24,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:24,495 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:24,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:24,710 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2020-12-22 04:24:24,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:24,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188743882] [2020-12-22 04:24:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188743882] [2020-12-22 04:24:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992836518] [2020-12-22 04:24:26,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:26,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:26,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:26,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:24:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:26,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:26,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:24:26,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094502458] [2020-12-22 04:24:26,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:24:26,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:26,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:24:26,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:24:26,357 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2020-12-22 04:24:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:26,578 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-22 04:24:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:24:26,579 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-22 04:24:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:26,579 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:24:26,579 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:24:26,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:24:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:24:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-22 04:24:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:24:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-12-22 04:24:26,584 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-12-22 04:24:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:26,584 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-12-22 04:24:26,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:24:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-12-22 04:24:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:24:26,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:26,585 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:26,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 04:24:26,796 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2020-12-22 04:24:26,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:26,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110869923] [2020-12-22 04:24:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:28,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110869923] [2020-12-22 04:24:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153141619] [2020-12-22 04:24:28,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:31,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 04:24:31,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:24:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:31,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:31,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 04:24:31,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160590595] [2020-12-22 04:24:31,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:24:31,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:31,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:24:31,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:24:31,290 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2020-12-22 04:24:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:31,493 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-12-22 04:24:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:24:31,493 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-22 04:24:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:31,494 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:24:31,495 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 04:24:31,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:24:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 04:24:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-22 04:24:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:24:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-22 04:24:31,500 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-12-22 04:24:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:31,500 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-22 04:24:31,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:24:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-22 04:24:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 04:24:31,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:31,501 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:31,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:24:31,708 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2020-12-22 04:24:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:31,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049540637] [2020-12-22 04:24:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049540637] [2020-12-22 04:24:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444958042] [2020-12-22 04:24:33,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:33,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:33,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:33,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:24:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:33,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:33,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 04:24:33,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797379444] [2020-12-22 04:24:33,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:24:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:24:33,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:24:33,659 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2020-12-22 04:24:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:33,873 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-12-22 04:24:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:24:33,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-22 04:24:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:33,875 INFO L225 Difference]: With dead ends: 106 [2020-12-22 04:24:33,875 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 04:24:33,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:24:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 04:24:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-22 04:24:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 04:24:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-12-22 04:24:33,879 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-12-22 04:24:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:33,880 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-12-22 04:24:33,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:24:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-12-22 04:24:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 04:24:33,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:33,880 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:34,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:24:34,081 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2020-12-22 04:24:34,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:34,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749235563] [2020-12-22 04:24:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:35,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749235563] [2020-12-22 04:24:35,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711368133] [2020-12-22 04:24:35,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:17,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 04:25:17,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:25:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:17,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:17,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 04:25:17,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166053907] [2020-12-22 04:25:17,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:25:17,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:17,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:25:17,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:25:17,666 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2020-12-22 04:25:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:17,909 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-12-22 04:25:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:25:17,912 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-12-22 04:25:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:17,913 INFO L225 Difference]: With dead ends: 108 [2020-12-22 04:25:17,913 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:25:17,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:25:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:25:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-22 04:25:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 04:25:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-12-22 04:25:17,918 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-12-22 04:25:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:17,918 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-12-22 04:25:17,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:25:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-12-22 04:25:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:25:17,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:17,919 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:18,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:18,120 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:18,120 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2020-12-22 04:25:18,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:18,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233208202] [2020-12-22 04:25:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:19,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233208202] [2020-12-22 04:25:19,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956750503] [2020-12-22 04:25:19,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:03,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 04:26:03,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:04,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:26:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:04,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:04,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 04:26:04,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867884517] [2020-12-22 04:26:04,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:26:04,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:26:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:26:04,205 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2020-12-22 04:26:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:04,430 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-22 04:26:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:26:04,431 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2020-12-22 04:26:04,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:04,432 INFO L225 Difference]: With dead ends: 110 [2020-12-22 04:26:04,432 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:26:04,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:26:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:26:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-22 04:26:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 04:26:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-12-22 04:26:04,436 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-12-22 04:26:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:04,436 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-12-22 04:26:04,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:26:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-12-22 04:26:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:26:04,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:04,437 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:04,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:26:04,649 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2020-12-22 04:26:04,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:04,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056606412] [2020-12-22 04:26:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:06,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056606412] [2020-12-22 04:26:06,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651340701] [2020-12-22 04:26:06,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:26:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:06,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:06,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 04:26:06,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888571342] [2020-12-22 04:26:06,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:26:06,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:06,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:26:06,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:26:06,669 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2020-12-22 04:26:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:06,917 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-12-22 04:26:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:26:06,917 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2020-12-22 04:26:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:06,921 INFO L225 Difference]: With dead ends: 112 [2020-12-22 04:26:06,921 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 04:26:06,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:26:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 04:26:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-22 04:26:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 04:26:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-22 04:26:06,925 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-12-22 04:26:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:06,926 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-22 04:26:06,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:26:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-22 04:26:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 04:26:06,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:06,927 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:07,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:26:07,141 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:07,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:07,142 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2020-12-22 04:26:07,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:07,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11628424] [2020-12-22 04:26:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:08,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11628424] [2020-12-22 04:26:08,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447489337] [2020-12-22 04:26:08,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:09,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:26:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:09,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:09,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 04:26:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939863886] [2020-12-22 04:26:09,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:26:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:26:09,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:26:09,205 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2020-12-22 04:26:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:09,456 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-12-22 04:26:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:26:09,456 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2020-12-22 04:26:09,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:09,457 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:26:09,458 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:26:09,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:26:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:26:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-22 04:26:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 04:26:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-12-22 04:26:09,462 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-12-22 04:26:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:09,462 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-12-22 04:26:09,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:26:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-12-22 04:26:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 04:26:09,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:09,463 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:09,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:09,676 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2020-12-22 04:26:09,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:09,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119499084] [2020-12-22 04:26:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:11,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119499084] [2020-12-22 04:26:11,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501408415] [2020-12-22 04:26:11,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:19,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-22 04:26:19,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:19,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:26:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:20,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:20,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 04:26:20,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406830524] [2020-12-22 04:26:20,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:26:20,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:20,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:26:20,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:26:20,043 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2020-12-22 04:26:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:20,275 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-12-22 04:26:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:26:20,276 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2020-12-22 04:26:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:20,277 INFO L225 Difference]: With dead ends: 116 [2020-12-22 04:26:20,277 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:26:20,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:26:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:26:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-22 04:26:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 04:26:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-12-22 04:26:20,280 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-12-22 04:26:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:20,280 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-12-22 04:26:20,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:26:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-12-22 04:26:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:26:20,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:20,281 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:20,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 04:26:20,482 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2020-12-22 04:26:20,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:20,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374404369] [2020-12-22 04:26:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:22,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374404369] [2020-12-22 04:26:22,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878031993] [2020-12-22 04:26:22,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:22,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:22,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:26:22,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:22,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:22,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 04:26:22,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395673097] [2020-12-22 04:26:22,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:26:22,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:22,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:26:22,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:26:22,650 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2020-12-22 04:26:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:22,867 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-12-22 04:26:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 04:26:22,868 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-22 04:26:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:22,869 INFO L225 Difference]: With dead ends: 118 [2020-12-22 04:26:22,869 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 04:26:22,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:26:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 04:26:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-22 04:26:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 04:26:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-12-22 04:26:22,875 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-12-22 04:26:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:22,875 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-12-22 04:26:22,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:26:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-12-22 04:26:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 04:26:22,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:22,876 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:23,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:23,078 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:23,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2020-12-22 04:26:23,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:23,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953559319] [2020-12-22 04:26:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:25,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953559319] [2020-12-22 04:26:25,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435860383] [2020-12-22 04:26:25,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true