/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_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:28:32,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:28:32,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:28:33,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:28:33,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:28:33,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:28:33,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:28:33,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:28:33,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:28:33,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:28:33,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:28:33,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:28:33,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:28:33,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:28:33,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:28:33,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:28:33,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:28:33,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:28:33,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:28:33,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:28:33,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:28:33,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:28:33,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:28:33,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:28:33,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:28:33,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:28:33,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:28:33,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:28:33,072 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:28:33,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:28:33,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:28:33,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:28:33,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:28:33,102 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:28:33,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:28:33,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:28:33,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:28:33,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:28:33,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:28:33,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:28:33,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:28:33,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:28:33,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:28:33,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:28:33,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:28:33,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:28:33,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:28:33,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:28:33,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:28:33,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:28:33,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:28:33,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:28:33,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:28:33,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:28:33,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:28:33,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:28:33,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:28:33,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:28:33,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:28:33,525 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:28:33,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2020-12-21 21:28:33,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae7ba648/9921539e0cdc4c6697f5101c120107ca/FLAG7df775a74 [2020-12-21 21:28:34,425 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:28:34,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2020-12-21 21:28:34,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae7ba648/9921539e0cdc4c6697f5101c120107ca/FLAG7df775a74 [2020-12-21 21:28:34,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae7ba648/9921539e0cdc4c6697f5101c120107ca [2020-12-21 21:28:34,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:28:34,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:28:34,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:28:34,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:28:34,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:28:34,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:28:34" (1/1) ... [2020-12-21 21:28:34,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a72bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:34, skipping insertion in model container [2020-12-21 21:28:34,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:28:34" (1/1) ... [2020-12-21 21:28:34,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:28:34,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:28:34,961 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_copy7_ground-2.i[816,829] [2020-12-21 21:28:34,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:28:34,994 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:28:35,008 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_copy7_ground-2.i[816,829] [2020-12-21 21:28:35,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:28:35,054 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:28:35,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35 WrapperNode [2020-12-21 21:28:35,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:28:35,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:28:35,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:28:35,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:28:35,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:28:35,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:28:35,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:28:35,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:28:35,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (1/1) ... [2020-12-21 21:28:35,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:28:35,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:28:35,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:28:35,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:28:35,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (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 21:28:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:28:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:28:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:28:35,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:28:35,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:28:35,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:28:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:28:35,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:28:35,781 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 21:28:35,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:28:35 BoogieIcfgContainer [2020-12-21 21:28:35,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:28:35,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:28:35,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:28:35,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:28:35,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:28:34" (1/3) ... [2020-12-21 21:28:35,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1723b09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:28:35, skipping insertion in model container [2020-12-21 21:28:35,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:35" (2/3) ... [2020-12-21 21:28:35,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1723b09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:28:35, skipping insertion in model container [2020-12-21 21:28:35,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:28:35" (3/3) ... [2020-12-21 21:28:35,800 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2020-12-21 21:28:35,807 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:28:35,813 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:28:35,838 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:28:35,870 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:28:35,871 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:28:35,871 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:28:35,871 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:28:35,871 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:28:35,871 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:28:35,872 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:28:35,872 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:28:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-12-21 21:28:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:28:35,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:35,897 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] [2020-12-21 21:28:35,898 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1647230389, now seen corresponding path program 1 times [2020-12-21 21:28:35,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:35,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593790624] [2020-12-21 21:28:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:36,162 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 21:28:36,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593790624] [2020-12-21 21:28:36,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:28:36,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:28:36,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394868128] [2020-12-21 21:28:36,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:28:36,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:36,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:28:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:28:36,192 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-12-21 21:28:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:36,230 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2020-12-21 21:28:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:28:36,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-21 21:28:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:36,242 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:28:36,243 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 21:28:36,246 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 21:28:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 21:28:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-21 21:28:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:28:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-21 21:28:36,293 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2020-12-21 21:28:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:36,294 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-21 21:28:36,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:28:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-21 21:28:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:28:36,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:36,295 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] [2020-12-21 21:28:36,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:28:36,296 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash -212862985, now seen corresponding path program 1 times [2020-12-21 21:28:36,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:36,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924384461] [2020-12-21 21:28:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:36,412 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 21:28:36,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924384461] [2020-12-21 21:28:36,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700992193] [2020-12-21 21:28:36,413 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 21:28:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:36,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:28:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:36,622 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 21:28:36,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:28:36,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:28:36,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646203133] [2020-12-21 21:28:36,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:28:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:36,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:28:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:36,627 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 3 states. [2020-12-21 21:28:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:36,721 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-12-21 21:28:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:28:36,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-21 21:28:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:36,723 INFO L225 Difference]: With dead ends: 72 [2020-12-21 21:28:36,723 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:28:36,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 21:28:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:28:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-12-21 21:28:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:28:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-12-21 21:28:36,733 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2020-12-21 21:28:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:36,734 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-12-21 21:28:36,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:28:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-12-21 21:28:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:28:36,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:36,736 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:28:36,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:28:36,951 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:36,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1047765161, now seen corresponding path program 1 times [2020-12-21 21:28:36,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:36,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885200431] [2020-12-21 21:28:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:28:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885200431] [2020-12-21 21:28:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974101828] [2020-12-21 21:28:37,071 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 21:28:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:28:37,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:28:37,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:37,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:28:37,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296420749] [2020-12-21 21:28:37,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:28:37,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:37,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:28:37,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:37,237 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-12-21 21:28:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:37,265 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-12-21 21:28:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:28:37,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-21 21:28:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:37,268 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:28:37,268 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:28:37,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 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 21:28:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:28:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-21 21:28:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:28:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-12-21 21:28:37,276 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 37 [2020-12-21 21:28:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:37,277 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-12-21 21:28:37,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:28:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-12-21 21:28:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:28:37,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:37,279 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:28:37,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:37,494 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1173005543, now seen corresponding path program 2 times [2020-12-21 21:28:37,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:37,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455967160] [2020-12-21 21:28:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:28:37,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455967160] [2020-12-21 21:28:37,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655227716] [2020-12-21 21:28:37,630 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 21:28:37,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:28:37,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:28:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:28:37,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:37,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:28:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830913431] [2020-12-21 21:28:37,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:28:37,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:28:37,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:37,781 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2020-12-21 21:28:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:37,911 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-12-21 21:28:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:28:37,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-21 21:28:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:37,913 INFO L225 Difference]: With dead ends: 94 [2020-12-21 21:28:37,913 INFO L226 Difference]: Without dead ends: 63 [2020-12-21 21:28:37,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 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 21:28:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-21 21:28:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-21 21:28:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:28:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-21 21:28:37,923 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 39 [2020-12-21 21:28:37,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:37,923 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-21 21:28:37,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:28:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-21 21:28:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:28:37,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:37,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-12-21 21:28:38,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:38,141 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:38,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1514760601, now seen corresponding path program 3 times [2020-12-21 21:28:38,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:38,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276869914] [2020-12-21 21:28:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 21:28:38,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276869914] [2020-12-21 21:28:38,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304320860] [2020-12-21 21:28:38,231 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 21:28:38,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:28:38,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:38,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:28:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 21:28:38,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:38,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 21:28:38,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844881637] [2020-12-21 21:28:38,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:28:38,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:38,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:28:38,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:28:38,403 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2020-12-21 21:28:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:38,675 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-12-21 21:28:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:28:38,676 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-12-21 21:28:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:38,677 INFO L225 Difference]: With dead ends: 129 [2020-12-21 21:28:38,677 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:28:38,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:28:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:28:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-12-21 21:28:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:28:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-12-21 21:28:38,688 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 53 [2020-12-21 21:28:38,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:38,688 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-12-21 21:28:38,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:28:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-12-21 21:28:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:28:38,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:38,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-12-21 21:28:38,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:38,904 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:38,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1887563127, now seen corresponding path program 4 times [2020-12-21 21:28:38,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:38,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475964753] [2020-12-21 21:28:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-21 21:28:39,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475964753] [2020-12-21 21:28:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593489365] [2020-12-21 21:28:39,079 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 21:28:39,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:28:39,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:39,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:28:39,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-21 21:28:39,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:39,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:28:39,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012969003] [2020-12-21 21:28:39,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:28:39,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:28:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:28:39,234 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 7 states. [2020-12-21 21:28:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:39,259 INFO L93 Difference]: Finished difference Result 138 states and 154 transitions. [2020-12-21 21:28:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:28:39,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-12-21 21:28:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:39,260 INFO L225 Difference]: With dead ends: 138 [2020-12-21 21:28:39,261 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:28:39,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 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 21:28:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:28:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-21 21:28:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:28:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-12-21 21:28:39,271 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 69 [2020-12-21 21:28:39,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:39,271 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-12-21 21:28:39,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:28:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-12-21 21:28:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:28:39,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:39,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-12-21 21:28:39,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:28:39,487 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash -735797561, now seen corresponding path program 5 times [2020-12-21 21:28:39,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:39,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275850472] [2020-12-21 21:28:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-21 21:28:39,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275850472] [2020-12-21 21:28:39,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83522186] [2020-12-21 21:28:39,580 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 21:28:45,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-21 21:28:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:28:45,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:28:45,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:45,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-21 21:28:45,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907454347] [2020-12-21 21:28:45,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:28:45,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:45,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:28:45,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:28:45,786 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 11 states. [2020-12-21 21:28:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:46,089 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2020-12-21 21:28:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:28:46,090 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-12-21 21:28:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:46,091 INFO L225 Difference]: With dead ends: 161 [2020-12-21 21:28:46,091 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:28:46,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:28:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:28:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2020-12-21 21:28:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:28:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-12-21 21:28:46,101 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 71 [2020-12-21 21:28:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:46,102 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-12-21 21:28:46,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:28:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-12-21 21:28:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-21 21:28:46,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:46,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2020-12-21 21:28:46,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:46,314 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash -557585481, now seen corresponding path program 6 times [2020-12-21 21:28:46,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:46,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558230553] [2020-12-21 21:28:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 21:28:46,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558230553] [2020-12-21 21:28:46,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517851164] [2020-12-21 21:28:46,472 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 21:28:47,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-21 21:28:47,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:28:47,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-21 21:28:47,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:47,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-21 21:28:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615168383] [2020-12-21 21:28:47,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:28:47,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:47,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:28:47,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:28:47,451 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 13 states. [2020-12-21 21:28:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:47,776 INFO L93 Difference]: Finished difference Result 191 states and 214 transitions. [2020-12-21 21:28:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:28:47,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 87 [2020-12-21 21:28:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:47,781 INFO L225 Difference]: With dead ends: 191 [2020-12-21 21:28:47,782 INFO L226 Difference]: Without dead ends: 114 [2020-12-21 21:28:47,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:28:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-21 21:28:47,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-12-21 21:28:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 21:28:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-12-21 21:28:47,800 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 87 [2020-12-21 21:28:47,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:47,800 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-12-21 21:28:47,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:28:47,801 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-12-21 21:28:47,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-21 21:28:47,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:47,803 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2020-12-21 21:28:48,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:48,017 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1371150503, now seen corresponding path program 7 times [2020-12-21 21:28:48,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:48,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573440688] [2020-12-21 21:28:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-21 21:28:48,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573440688] [2020-12-21 21:28:48,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409175274] [2020-12-21 21:28:48,173 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 21:28:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:28:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-21 21:28:48,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:48,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:28:48,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349485130] [2020-12-21 21:28:48,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:28:48,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:48,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:28:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:28:48,379 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 10 states. [2020-12-21 21:28:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:48,422 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2020-12-21 21:28:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:28:48,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-12-21 21:28:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:48,424 INFO L225 Difference]: With dead ends: 200 [2020-12-21 21:28:48,424 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 21:28:48,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 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 21:28:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 21:28:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-12-21 21:28:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 21:28:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-12-21 21:28:48,448 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 103 [2020-12-21 21:28:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:48,470 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-12-21 21:28:48,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:28:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-12-21 21:28:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 21:28:48,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:48,472 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2020-12-21 21:28:48,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:28:48,674 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:48,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:48,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1580995941, now seen corresponding path program 8 times [2020-12-21 21:28:48,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:48,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519635331] [2020-12-21 21:28:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-21 21:28:48,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519635331] [2020-12-21 21:28:48,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059467099] [2020-12-21 21:28:48,853 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 21:28:48,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:28:48,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:28:48,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-21 21:28:49,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:49,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:28:49,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128502088] [2020-12-21 21:28:49,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:28:49,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:49,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:28:49,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:28:49,130 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 11 states. [2020-12-21 21:28:49,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:49,177 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2020-12-21 21:28:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:28:49,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 105 [2020-12-21 21:28:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:49,178 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:28:49,179 INFO L226 Difference]: Without dead ends: 111 [2020-12-21 21:28:49,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 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 21:28:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-21 21:28:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-12-21 21:28:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-21 21:28:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-12-21 21:28:49,186 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 105 [2020-12-21 21:28:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:49,187 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-12-21 21:28:49,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:28:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-12-21 21:28:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-21 21:28:49,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:49,188 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2020-12-21 21:28:49,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:49,405 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1378998947, now seen corresponding path program 9 times [2020-12-21 21:28:49,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:49,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498993134] [2020-12-21 21:28:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-21 21:28:49,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498993134] [2020-12-21 21:28:49,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697186430] [2020-12-21 21:28:49,642 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 21:28:52,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:28:52,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:52,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:28:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-12-21 21:28:52,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:52,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2020-12-21 21:28:52,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632283125] [2020-12-21 21:28:52,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:28:52,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:52,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:28:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:28:52,880 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 17 states. [2020-12-21 21:28:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:53,229 INFO L93 Difference]: Finished difference Result 225 states and 248 transitions. [2020-12-21 21:28:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:28:53,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 107 [2020-12-21 21:28:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:53,231 INFO L225 Difference]: With dead ends: 225 [2020-12-21 21:28:53,231 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 21:28:53,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:28:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 21:28:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2020-12-21 21:28:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-21 21:28:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2020-12-21 21:28:53,239 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 107 [2020-12-21 21:28:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:53,240 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2020-12-21 21:28:53,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:28:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2020-12-21 21:28:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-21 21:28:53,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:53,241 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 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, 1, 1, 1, 1] [2020-12-21 21:28:53,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:53,456 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1217621907, now seen corresponding path program 10 times [2020-12-21 21:28:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:53,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210444504] [2020-12-21 21:28:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-21 21:28:53,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210444504] [2020-12-21 21:28:53,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318312506] [2020-12-21 21:28:53,675 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 21:28:53,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:28:53,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:53,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:28:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-21 21:28:53,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:53,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:28:53,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135754547] [2020-12-21 21:28:53,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:28:53,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:53,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:28:53,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:28:53,919 INFO L87 Difference]: Start difference. First operand 126 states and 134 transitions. Second operand 13 states. [2020-12-21 21:28:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:53,974 INFO L93 Difference]: Finished difference Result 234 states and 250 transitions. [2020-12-21 21:28:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:28:53,975 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-12-21 21:28:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:53,977 INFO L225 Difference]: With dead ends: 234 [2020-12-21 21:28:53,977 INFO L226 Difference]: Without dead ends: 129 [2020-12-21 21:28:53,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 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 21:28:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-21 21:28:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-21 21:28:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-21 21:28:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2020-12-21 21:28:53,985 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 123 [2020-12-21 21:28:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:53,985 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2020-12-21 21:28:53,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:28:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2020-12-21 21:28:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-21 21:28:53,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:53,988 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 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, 1, 1, 1, 1] [2020-12-21 21:28:54,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:28:54,203 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash -171597487, now seen corresponding path program 11 times [2020-12-21 21:28:54,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:54,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121474261] [2020-12-21 21:28:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-21 21:28:54,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121474261] [2020-12-21 21:28:54,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133709565] [2020-12-21 21:28:54,406 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