/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:33:51,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:33:51,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:33:51,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:33:51,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:33:51,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:33:51,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:33:51,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:33:51,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:33:51,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:33:51,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:33:51,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 21:33:51,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:33:51,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:33:51,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:33:51,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:33:51,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:33:51,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:33:51,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:33:51,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:33:51,834 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:33:51,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:33:51,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:33:51,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:33:51,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:33:51,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:33:51,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:33:51,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:33:51,837 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:33:51,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:33:51,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:33:51,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:33:51,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:33:51,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:33:51,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:33:51,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:33:51,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:33:51,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:33:51,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:33:51,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:33:51,840 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:33:51,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:33:52,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:33:52,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:33:52,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:33:52,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:33:52,355 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:33:52,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init5_ground-1.i [2020-12-21 21:33:52,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72feefc8b/80d9d3b90a1f477f844752e15e13754d/FLAG0c2c8216d [2020-12-21 21:33:53,072 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:33:53,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-1.i [2020-12-21 21:33:53,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72feefc8b/80d9d3b90a1f477f844752e15e13754d/FLAG0c2c8216d [2020-12-21 21:33:53,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72feefc8b/80d9d3b90a1f477f844752e15e13754d [2020-12-21 21:33:53,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:33:53,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:33:53,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:53,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:33:53,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:33:53,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d422a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53, skipping insertion in model container [2020-12-21 21:33:53,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:33:53,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:33:53,633 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-1.i[816,829] [2020-12-21 21:33:53,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:53,661 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:33:53,677 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-1.i[816,829] [2020-12-21 21:33:53,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:53,722 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:33:53,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53 WrapperNode [2020-12-21 21:33:53,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:53,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:53,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:33:53,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:33:53,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:53,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:33:53,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:33:53,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:33:53,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... [2020-12-21 21:33:53,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:33:53,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:33:53,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:33:53,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:33:53,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:33:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:33:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:33:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:33:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:33:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:33:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:33:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:33:54,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:33:54,377 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 21:33:54,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:54 BoogieIcfgContainer [2020-12-21 21:33:54,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:33:54,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:33:54,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:33:54,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:33:54,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:33:53" (1/3) ... [2020-12-21 21:33:54,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351303dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:54, skipping insertion in model container [2020-12-21 21:33:54,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:53" (2/3) ... [2020-12-21 21:33:54,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351303dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:54, skipping insertion in model container [2020-12-21 21:33:54,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:54" (3/3) ... [2020-12-21 21:33:54,401 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2020-12-21 21:33:54,408 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:33:54,413 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:33:54,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:33:54,464 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:33:54,465 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:33:54,465 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:33:54,465 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:33:54,465 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:33:54,465 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:33:54,466 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:33:54,466 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:33:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-21 21:33:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 21:33:54,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:54,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:54,492 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:54,500 INFO L82 PathProgramCache]: Analyzing trace with hash 846254768, now seen corresponding path program 1 times [2020-12-21 21:33:54,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:54,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303397280] [2020-12-21 21:33:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:54,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303397280] [2020-12-21 21:33:54,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:33:54,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:33:54,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090269821] [2020-12-21 21:33:54,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:33:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:54,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:33:54,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:33:54,747 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-21 21:33:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:54,851 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2020-12-21 21:33:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:33:54,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-12-21 21:33:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:54,863 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:33:54,863 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:33:54,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:33:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:33:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 21:33:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:33:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-21 21:33:54,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2020-12-21 21:33:54,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:54,916 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-21 21:33:54,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:33:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-21 21:33:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:33:54,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:54,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:54,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:33:54,919 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:54,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1299919835, now seen corresponding path program 1 times [2020-12-21 21:33:54,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:54,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893356011] [2020-12-21 21:33:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:33:54,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893356011] [2020-12-21 21:33:54,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602497567] [2020-12-21 21:33:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:55,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:33:55,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:33:55,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:55,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:33:55,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660375367] [2020-12-21 21:33:55,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:33:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:33:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:33:55,155 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-21 21:33:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:55,227 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-12-21 21:33:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:33:55,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-21 21:33:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:55,229 INFO L225 Difference]: With dead ends: 47 [2020-12-21 21:33:55,229 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:33:55,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:33:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:33:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-21 21:33:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 21:33:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-21 21:33:55,238 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2020-12-21 21:33:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:55,239 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-21 21:33:55,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:33:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-21 21:33:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:33:55,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:55,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:55,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:33:55,455 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1276432308, now seen corresponding path program 2 times [2020-12-21 21:33:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:55,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806323779] [2020-12-21 21:33:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:33:55,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806323779] [2020-12-21 21:33:55,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501675127] [2020-12-21 21:33:55,585 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 [2020-12-21 21:33:55,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:55,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:55,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:33:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:33:55,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:55,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:33:55,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134124081] [2020-12-21 21:33:55,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:33:55,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:55,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:33:55,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:33:55,782 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2020-12-21 21:33:55,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:55,915 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-12-21 21:33:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:33:55,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-21 21:33:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:55,917 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:33:55,917 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 21:33:55,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:33:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 21:33:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-21 21:33:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:33:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-21 21:33:55,925 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2020-12-21 21:33:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:55,926 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-21 21:33:55,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:33:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-21 21:33:55,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:33:55,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:55,927 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:56,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:56,141 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1067918085, now seen corresponding path program 3 times [2020-12-21 21:33:56,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:56,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205320010] [2020-12-21 21:33:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:33:56,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205320010] [2020-12-21 21:33:56,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696905743] [2020-12-21 21:33:56,289 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:56,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:33:56,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:56,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:33:56,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:33:56,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:56,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:33:56,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899124658] [2020-12-21 21:33:56,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:33:56,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:56,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:33:56,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:33:56,463 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-12-21 21:33:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:56,542 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-21 21:33:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:33:56,542 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-21 21:33:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:56,543 INFO L225 Difference]: With dead ends: 65 [2020-12-21 21:33:56,543 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:33:56,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:33:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:33:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-21 21:33:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:33:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-21 21:33:56,551 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 30 [2020-12-21 21:33:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:56,552 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-21 21:33:56,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:33:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-21 21:33:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:33:56,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:56,553 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:56,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:56,767 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1604238356, now seen corresponding path program 4 times [2020-12-21 21:33:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:56,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112220780] [2020-12-21 21:33:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 21:33:56,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112220780] [2020-12-21 21:33:56,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100638671] [2020-12-21 21:33:56,864 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 [2020-12-21 21:33:56,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:56,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:33:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 21:33:57,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:57,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:33:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564326503] [2020-12-21 21:33:57,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:33:57,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:33:57,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:33:57,036 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-12-21 21:33:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:57,157 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-12-21 21:33:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:33:57,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-12-21 21:33:57,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:57,158 INFO L225 Difference]: With dead ends: 74 [2020-12-21 21:33:57,158 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:33:57,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:33:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:33:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-21 21:33:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:33:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-12-21 21:33:57,166 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 35 [2020-12-21 21:33:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:57,166 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-12-21 21:33:57,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:33:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-21 21:33:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:33:57,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:57,168 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:57,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:57,384 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash 313549285, now seen corresponding path program 5 times [2020-12-21 21:33:57,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:57,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690037780] [2020-12-21 21:33:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-21 21:33:57,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690037780] [2020-12-21 21:33:57,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126965302] [2020-12-21 21:33:57,535 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 [2020-12-21 21:33:58,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:33:58,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:58,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:33:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-21 21:33:59,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:59,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:33:59,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208328846] [2020-12-21 21:33:59,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:33:59,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:59,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:33:59,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:33:59,029 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2020-12-21 21:33:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:59,137 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-12-21 21:33:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:33:59,138 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-12-21 21:33:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:59,139 INFO L225 Difference]: With dead ends: 83 [2020-12-21 21:33:59,139 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 21:33:59,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:33:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 21:33:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-21 21:33:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:33:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-21 21:33:59,148 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 40 [2020-12-21 21:33:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:59,148 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-21 21:33:59,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:33:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-21 21:33:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:33:59,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:59,150 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:59,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:33:59,365 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:59,366 INFO L82 PathProgramCache]: Analyzing trace with hash 355512204, now seen corresponding path program 6 times [2020-12-21 21:33:59,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:59,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916571169] [2020-12-21 21:33:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-21 21:33:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916571169] [2020-12-21 21:33:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555558321] [2020-12-21 21:33:59,498 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 [2020-12-21 21:34:00,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:34:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:00,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:34:00,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-21 21:34:00,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:00,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:34:00,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475756287] [2020-12-21 21:34:00,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:34:00,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:00,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:34:00,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:00,561 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2020-12-21 21:34:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:00,663 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-12-21 21:34:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:34:00,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-12-21 21:34:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:00,666 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:34:00,667 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:34:00,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:34:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-21 21:34:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 21:34:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-12-21 21:34:00,680 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 45 [2020-12-21 21:34:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:00,682 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-12-21 21:34:00,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:34:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-12-21 21:34:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:34:00,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:00,683 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:00,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:00,886 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -215316283, now seen corresponding path program 7 times [2020-12-21 21:34:00,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:00,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388186629] [2020-12-21 21:34:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 21:34:01,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388186629] [2020-12-21 21:34:01,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550617851] [2020-12-21 21:34:01,003 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 [2020-12-21 21:34:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:34:01,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 21:34:01,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:01,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:34:01,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371483551] [2020-12-21 21:34:01,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:34:01,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:01,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:34:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:01,216 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 11 states. [2020-12-21 21:34:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:01,337 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-12-21 21:34:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:34:01,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-12-21 21:34:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:01,342 INFO L225 Difference]: With dead ends: 101 [2020-12-21 21:34:01,342 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 21:34:01,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 21:34:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-21 21:34:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:34:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-12-21 21:34:01,357 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 50 [2020-12-21 21:34:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:01,357 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-12-21 21:34:01,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:34:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-12-21 21:34:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:34:01,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:01,359 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:01,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:01,573 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:01,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1821412564, now seen corresponding path program 8 times [2020-12-21 21:34:01,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:01,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256248789] [2020-12-21 21:34:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-21 21:34:01,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256248789] [2020-12-21 21:34:01,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973524434] [2020-12-21 21:34:01,758 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 [2020-12-21 21:34:01,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:01,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:34:01,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-21 21:34:01,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:01,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:34:01,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28566469] [2020-12-21 21:34:01,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:34:01,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:34:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:01,953 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 12 states. [2020-12-21 21:34:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:02,076 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-12-21 21:34:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:34:02,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-12-21 21:34:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:02,078 INFO L225 Difference]: With dead ends: 110 [2020-12-21 21:34:02,078 INFO L226 Difference]: Without dead ends: 63 [2020-12-21 21:34:02,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-21 21:34:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-21 21:34:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:34:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-12-21 21:34:02,103 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 55 [2020-12-21 21:34:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:02,104 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-12-21 21:34:02,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:34:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-12-21 21:34:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:34:02,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:02,110 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:02,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:34:02,324 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash 622827429, now seen corresponding path program 9 times [2020-12-21 21:34:02,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:02,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092603690] [2020-12-21 21:34:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-21 21:34:02,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092603690] [2020-12-21 21:34:02,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118249868] [2020-12-21 21:34:02,513 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 [2020-12-21 21:34:06,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:34:06,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:06,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:34:06,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-21 21:34:06,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:06,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:34:06,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526981444] [2020-12-21 21:34:06,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:34:06,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:34:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:34:06,405 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 13 states. [2020-12-21 21:34:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:06,533 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2020-12-21 21:34:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:34:06,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-12-21 21:34:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:06,535 INFO L225 Difference]: With dead ends: 119 [2020-12-21 21:34:06,535 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:34:06,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:34:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:34:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-21 21:34:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:34:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-12-21 21:34:06,542 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 60 [2020-12-21 21:34:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:06,543 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-12-21 21:34:06,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:34:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-12-21 21:34:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:34:06,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:06,544 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:06,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:06,759 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:06,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:06,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1605603020, now seen corresponding path program 10 times [2020-12-21 21:34:06,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:06,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055837036] [2020-12-21 21:34:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-12-21 21:34:06,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055837036] [2020-12-21 21:34:06,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601223758] [2020-12-21 21:34:06,920 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 [2020-12-21 21:34:07,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:07,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:07,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:34:07,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-12-21 21:34:07,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:07,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:34:07,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43628475] [2020-12-21 21:34:07,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:34:07,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:07,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:34:07,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:34:07,095 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 14 states. [2020-12-21 21:34:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:07,236 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-12-21 21:34:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:34:07,236 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-12-21 21:34:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:07,237 INFO L225 Difference]: With dead ends: 128 [2020-12-21 21:34:07,237 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 21:34:07,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:34:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 21:34:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-21 21:34:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:34:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-12-21 21:34:07,257 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 65 [2020-12-21 21:34:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:07,257 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-12-21 21:34:07,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:34:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-12-21 21:34:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 21:34:07,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:07,266 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:07,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:07,481 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:07,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:07,482 INFO L82 PathProgramCache]: Analyzing trace with hash 152669829, now seen corresponding path program 11 times [2020-12-21 21:34:07,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:07,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842349852] [2020-12-21 21:34:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-12-21 21:34:07,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842349852] [2020-12-21 21:34:07,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899165511] [2020-12-21 21:34:07,638 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