/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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:24:20,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:24:20,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:24:20,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:24:20,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:24:20,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:24:20,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:24:20,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:24:20,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:24:20,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:24:20,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:24:20,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:24:20,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:24:20,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:24:20,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:24:20,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:24:20,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:24:20,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:24:20,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:24:20,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:24:20,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:24:20,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:24:20,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:24:20,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:24:20,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:24:20,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:24:20,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:24:20,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:24:20,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:24:21,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:24:21,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:24:21,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:24:21,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:24:21,072 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:24:21,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:24:21,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:24:21,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:24:21,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:24:21,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:24:21,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:24:21,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:24:21,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:24:21,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:24:21,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:24:21,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:24:21,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:24:21,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:24:21,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:24:21,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:24:21,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:24:21,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:24:21,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:24:21,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:24:21,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:24:21,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:24:21,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:24:21,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:24:21,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:24:21,773 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:24:21,775 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:24:21,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2020-12-21 21:24:21,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d7245c8/c1c627afa97b4cccb3f05b8290e45a0e/FLAG923febd81 [2020-12-21 21:24:22,798 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:24:22,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2020-12-21 21:24:22,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d7245c8/c1c627afa97b4cccb3f05b8290e45a0e/FLAG923febd81 [2020-12-21 21:24:23,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d7245c8/c1c627afa97b4cccb3f05b8290e45a0e [2020-12-21 21:24:23,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:24:23,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:24:23,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:24:23,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:24:23,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:24:23,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b37c23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23, skipping insertion in model container [2020-12-21 21:24:23,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:24:23,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:24:23,347 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_copy5_ground-2.i[816,829] [2020-12-21 21:24:23,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:24:23,396 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:24:23,418 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_copy5_ground-2.i[816,829] [2020-12-21 21:24:23,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:24:23,465 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:24:23,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23 WrapperNode [2020-12-21 21:24:23,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:24:23,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:24:23,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:24:23,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:24:23,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:24:23,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:24:23,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:24:23,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:24:23,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (1/1) ... [2020-12-21 21:24:23,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:24:23,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:24:23,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:24:23,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:24:23,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (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 21:24:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:24:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:24:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:24:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:24:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:24:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:24:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:24:24,715 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:24:24,715 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-21 21:24:24,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:24:24 BoogieIcfgContainer [2020-12-21 21:24:24,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:24:24,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:24:24,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:24:24,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:24:24,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:24:23" (1/3) ... [2020-12-21 21:24:24,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8e518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:24:24, skipping insertion in model container [2020-12-21 21:24:24,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:23" (2/3) ... [2020-12-21 21:24:24,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8e518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:24:24, skipping insertion in model container [2020-12-21 21:24:24,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:24:24" (3/3) ... [2020-12-21 21:24:24,745 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2020-12-21 21:24:24,757 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:24:24,766 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:24:24,797 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:24:24,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:24:24,866 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:24:24,866 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:24:24,866 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:24:24,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:24:24,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:24:24,867 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:24:24,867 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:24:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-21 21:24:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:24:24,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:24,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:24,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash -18882701, now seen corresponding path program 1 times [2020-12-21 21:24:24,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:24,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046254892] [2020-12-21 21:24:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:25,426 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 21:24:25,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046254892] [2020-12-21 21:24:25,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:24:25,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:24:25,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410269073] [2020-12-21 21:24:25,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:24:25,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:24:25,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:24:25,481 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-12-21 21:24:25,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:25,593 INFO L93 Difference]: Finished difference Result 58 states and 86 transitions. [2020-12-21 21:24:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:24:25,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-21 21:24:25,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:25,633 INFO L225 Difference]: With dead ends: 58 [2020-12-21 21:24:25,634 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:24:25,647 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 21:24:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:24:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-21 21:24:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:24:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-21 21:24:25,726 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2020-12-21 21:24:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:25,727 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-21 21:24:25,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:24:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-21 21:24:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:24:25,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:25,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:25,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:24:25,734 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1592499797, now seen corresponding path program 1 times [2020-12-21 21:24:25,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:25,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866207100] [2020-12-21 21:24:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:24:25,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866207100] [2020-12-21 21:24:25,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992078702] [2020-12-21 21:24:25,934 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 21:24:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:24:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:24:26,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:24:26,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:24:26,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44327577] [2020-12-21 21:24:26,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:24:26,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:24:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:26,081 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2020-12-21 21:24:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:26,173 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-12-21 21:24:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:24:26,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 21:24:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:26,175 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:24:26,176 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:24:26,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:24:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-12-21 21:24:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:24:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-21 21:24:26,186 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2020-12-21 21:24:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:26,186 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-21 21:24:26,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:24:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-21 21:24:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:24:26,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:26,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:26,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:24:26,404 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash 722749857, now seen corresponding path program 1 times [2020-12-21 21:24:26,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:26,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106449361] [2020-12-21 21:24:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:24:26,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106449361] [2020-12-21 21:24:26,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900012806] [2020-12-21 21:24:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:24:26,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:24:26,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:26,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:24:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647008692] [2020-12-21 21:24:26,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:24:26,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:24:26,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:26,655 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-12-21 21:24:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:26,692 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-12-21 21:24:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:24:26,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-21 21:24:26,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:26,696 INFO L225 Difference]: With dead ends: 62 [2020-12-21 21:24:26,696 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:24:26,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 21:24:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:24:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 21:24:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:24:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-21 21:24:26,706 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2020-12-21 21:24:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:26,706 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-21 21:24:26,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:24:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-21 21:24:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:24:26,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:26,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:26,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:26,925 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:26,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:26,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1187353633, now seen corresponding path program 2 times [2020-12-21 21:24:26,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:26,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141805781] [2020-12-21 21:24:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:24:27,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141805781] [2020-12-21 21:24:27,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966730637] [2020-12-21 21:24:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:27,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:27,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:24:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:24:27,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:27,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:24:27,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246315689] [2020-12-21 21:24:27,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:24:27,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:24:27,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:24:27,289 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2020-12-21 21:24:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:27,438 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-12-21 21:24:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:24:27,439 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-21 21:24:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:27,440 INFO L225 Difference]: With dead ends: 79 [2020-12-21 21:24:27,441 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:24:27,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:24:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:24:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-12-21 21:24:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:24:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-12-21 21:24:27,452 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2020-12-21 21:24:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:27,452 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-12-21 21:24:27,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:24:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-12-21 21:24:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:24:27,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:27,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:27,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:27,669 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1347184621, now seen corresponding path program 3 times [2020-12-21 21:24:27,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:27,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791904153] [2020-12-21 21:24:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:24:27,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791904153] [2020-12-21 21:24:27,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628844084] [2020-12-21 21:24:27,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:28,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:24:28,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:24:28,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:24:28,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:28,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:24:28,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675228935] [2020-12-21 21:24:28,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:24:28,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:24:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:24:28,091 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-12-21 21:24:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:28,320 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-12-21 21:24:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:24:28,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-12-21 21:24:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:28,322 INFO L225 Difference]: With dead ends: 101 [2020-12-21 21:24:28,322 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:24:28,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:24:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:24:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-12-21 21:24:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:24:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-12-21 21:24:28,356 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 43 [2020-12-21 21:24:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:28,357 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-12-21 21:24:28,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:24:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-12-21 21:24:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:24:28,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:28,363 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:28,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:28,579 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:28,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:28,581 INFO L82 PathProgramCache]: Analyzing trace with hash 604038727, now seen corresponding path program 4 times [2020-12-21 21:24:28,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:28,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965096525] [2020-12-21 21:24:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-21 21:24:28,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965096525] [2020-12-21 21:24:28,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694662915] [2020-12-21 21:24:28,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:28,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:28,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:28,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:24:28,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-21 21:24:28,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:28,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:24:28,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281757080] [2020-12-21 21:24:28,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:24:28,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:24:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:24:28,893 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 8 states. [2020-12-21 21:24:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:28,936 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-12-21 21:24:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:24:28,937 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-12-21 21:24:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:28,939 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:24:28,939 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:24:28,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 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 21:24:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:24:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-21 21:24:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 21:24:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-12-21 21:24:28,949 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 55 [2020-12-21 21:24:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:28,949 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-12-21 21:24:28,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:24:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-12-21 21:24:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:24:28,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:28,952 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:29,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:24:29,168 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1417844485, now seen corresponding path program 5 times [2020-12-21 21:24:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:29,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461184561] [2020-12-21 21:24:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-21 21:24:29,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461184561] [2020-12-21 21:24:29,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968765925] [2020-12-21 21:24:29,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:39,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:24:39,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:24:39,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-21 21:24:39,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:39,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:24:39,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362467732] [2020-12-21 21:24:39,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:24:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:24:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:39,379 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 12 states. [2020-12-21 21:24:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:39,544 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-12-21 21:24:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:24:39,545 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-21 21:24:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:39,546 INFO L225 Difference]: With dead ends: 125 [2020-12-21 21:24:39,546 INFO L226 Difference]: Without dead ends: 78 [2020-12-21 21:24:39,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-21 21:24:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-12-21 21:24:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:24:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-12-21 21:24:39,555 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 57 [2020-12-21 21:24:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:39,555 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-12-21 21:24:39,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:24:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-12-21 21:24:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:24:39,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:39,557 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:39,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:39,771 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash -371467719, now seen corresponding path program 6 times [2020-12-21 21:24:39,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:39,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237235223] [2020-12-21 21:24:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-21 21:24:39,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237235223] [2020-12-21 21:24:39,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210940600] [2020-12-21 21:24:39,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:40,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:24:40,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:24:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:24:40,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:40,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:24:40,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077877416] [2020-12-21 21:24:40,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:24:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:24:40,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:40,733 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 14 states. [2020-12-21 21:24:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:40,963 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-12-21 21:24:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:24:40,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-12-21 21:24:40,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:40,966 INFO L225 Difference]: With dead ends: 147 [2020-12-21 21:24:40,967 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 21:24:40,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 21:24:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-12-21 21:24:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-21 21:24:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-12-21 21:24:40,994 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 69 [2020-12-21 21:24:40,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:40,995 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-12-21 21:24:40,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:24:40,997 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-12-21 21:24:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 21:24:40,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:40,999 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:41,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:41,200 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:41,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2082029715, now seen corresponding path program 7 times [2020-12-21 21:24:41,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:41,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230824012] [2020-12-21 21:24:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-21 21:24:41,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230824012] [2020-12-21 21:24:41,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742504264] [2020-12-21 21:24:41,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:41,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:24:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-21 21:24:41,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:41,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:24:41,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731138825] [2020-12-21 21:24:41,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:24:41,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:24:41,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:24:41,569 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 11 states. [2020-12-21 21:24:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:41,637 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2020-12-21 21:24:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:24:41,637 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2020-12-21 21:24:41,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:41,638 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:24:41,638 INFO L226 Difference]: Without dead ends: 87 [2020-12-21 21:24:41,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 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 21:24:41,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-21 21:24:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-12-21 21:24:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 21:24:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-12-21 21:24:41,650 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 81 [2020-12-21 21:24:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:41,651 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-12-21 21:24:41,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:24:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-12-21 21:24:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:24:41,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:41,652 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:41,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:24:41,853 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1792466603, now seen corresponding path program 8 times [2020-12-21 21:24:41,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:41,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572367625] [2020-12-21 21:24:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-21 21:24:41,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572367625] [2020-12-21 21:24:41,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32612927] [2020-12-21 21:24:41,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:42,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:42,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:24:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-21 21:24:42,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:42,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:24:42,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077920546] [2020-12-21 21:24:42,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:24:42,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:24:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:42,216 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 12 states. [2020-12-21 21:24:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:42,267 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2020-12-21 21:24:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:24:42,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-12-21 21:24:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:42,269 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:24:42,269 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:24:42,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 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 21:24:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:24:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-12-21 21:24:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 21:24:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-12-21 21:24:42,276 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 83 [2020-12-21 21:24:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:42,276 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-12-21 21:24:42,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:24:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-12-21 21:24:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:24:42,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:42,278 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:42,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:42,493 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:42,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1446782569, now seen corresponding path program 9 times [2020-12-21 21:24:42,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:42,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406707031] [2020-12-21 21:24:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-21 21:24:42,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406707031] [2020-12-21 21:24:42,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900783961] [2020-12-21 21:24:42,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:44,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:24:44,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:44,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:24:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-12-21 21:24:44,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:44,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:24:44,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565556827] [2020-12-21 21:24:44,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:24:44,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:44,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:24:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:24:44,455 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 18 states. [2020-12-21 21:24:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:44,673 INFO L93 Difference]: Finished difference Result 173 states and 190 transitions. [2020-12-21 21:24:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:24:44,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-12-21 21:24:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:44,675 INFO L225 Difference]: With dead ends: 173 [2020-12-21 21:24:44,675 INFO L226 Difference]: Without dead ends: 106 [2020-12-21 21:24:44,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:24:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-21 21:24:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2020-12-21 21:24:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 21:24:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-12-21 21:24:44,685 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 85 [2020-12-21 21:24:44,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:44,686 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-12-21 21:24:44,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:24:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-12-21 21:24:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:24:44,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:44,687 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:44,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:44,902 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash -137686115, now seen corresponding path program 10 times [2020-12-21 21:24:44,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:44,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058798703] [2020-12-21 21:24:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-21 21:24:45,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058798703] [2020-12-21 21:24:45,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530906189] [2020-12-21 21:24:45,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:45,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:45,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:24:45,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-12-21 21:24:45,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:45,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-21 21:24:45,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512300666] [2020-12-21 21:24:45,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:24:45,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:24:45,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:24:45,396 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 20 states. [2020-12-21 21:24:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:45,695 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-12-21 21:24:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:24:45,696 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-12-21 21:24:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:45,697 INFO L225 Difference]: With dead ends: 195 [2020-12-21 21:24:45,697 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 21:24:45,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:24:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 21:24:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2020-12-21 21:24:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-21 21:24:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2020-12-21 21:24:45,704 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 97 [2020-12-21 21:24:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:45,704 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2020-12-21 21:24:45,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:24:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2020-12-21 21:24:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-21 21:24:45,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:45,705 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:45,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:24:45,919 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2116330193, now seen corresponding path program 11 times [2020-12-21 21:24:45,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:45,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138365711] [2020-12-21 21:24:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-21 21:24:46,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138365711] [2020-12-21 21:24:46,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498811937] [2020-12-21 21:24:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true