/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_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:34:13,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:34:13,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:34:13,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:34:13,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:34:13,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:34:13,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:34:13,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:34:13,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:34:13,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:34:13,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:34:13,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:34:13,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:34:13,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:34:13,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:34:13,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:34:13,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:34:13,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:34:13,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:34:13,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:34:13,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:34:13,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:34:13,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:34:13,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:34:13,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:34:13,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:34:13,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:34:13,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:34:13,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:34:14,031 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:34:14,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:34:14,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:34:14,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:34:14,036 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:34:14,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:34:14,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:34:14,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:34:14,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:34:14,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:34:14,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:34:14,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:34:14,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:34:14,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:34:14,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:34:14,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:34:14,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:34:14,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:34:14,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:34:14,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:34:14,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:34:14,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:34:14,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:34:14,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:34:14,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:34:14,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:34:14,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:34:14,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:34:14,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:34:14,470 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:34:14,471 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:34:14,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init8_ground-2.i [2020-12-21 21:34:14,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be7a29f78/3dd636e63d874e488b1cbb5dc515ed4e/FLAG2e22da4d8 [2020-12-21 21:34:15,339 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:34:15,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init8_ground-2.i [2020-12-21 21:34:15,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be7a29f78/3dd636e63d874e488b1cbb5dc515ed4e/FLAG2e22da4d8 [2020-12-21 21:34:15,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be7a29f78/3dd636e63d874e488b1cbb5dc515ed4e [2020-12-21 21:34:15,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:34:15,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:34:15,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:34:15,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:34:15,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:34:15,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:15,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed7c0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15, skipping insertion in model container [2020-12-21 21:34:15,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:15,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:34:15,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:34:15,881 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_init8_ground-2.i[816,829] [2020-12-21 21:34:15,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:34:15,913 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:34:15,928 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_init8_ground-2.i[816,829] [2020-12-21 21:34:15,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:34:15,959 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:34:15,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15 WrapperNode [2020-12-21 21:34:15,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:34:15,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:34:15,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:34:15,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:34:15,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:15,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:16,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:34:16,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:34:16,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:34:16,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:34:16,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:16,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:16,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:16,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:16,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:16,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:16,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (1/1) ... [2020-12-21 21:34:16,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:34:16,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:34:16,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:34:16,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:34:16,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (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 21:34:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:34:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:34:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:34:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:34:16,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:34:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:34:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:34:16,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:34:16,720 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 21:34:16,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:34:16 BoogieIcfgContainer [2020-12-21 21:34:16,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:34:16,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:34:16,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:34:16,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:34:16,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:34:15" (1/3) ... [2020-12-21 21:34:16,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1a07a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:34:16, skipping insertion in model container [2020-12-21 21:34:16,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:15" (2/3) ... [2020-12-21 21:34:16,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1a07a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:34:16, skipping insertion in model container [2020-12-21 21:34:16,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:34:16" (3/3) ... [2020-12-21 21:34:16,760 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2020-12-21 21:34:16,773 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:34:16,779 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:34:16,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:34:16,826 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:34:16,827 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:34:16,827 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:34:16,827 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:34:16,827 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:34:16,827 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:34:16,827 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:34:16,827 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:34:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-21 21:34:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:34:16,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:16,847 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 21:34:16,848 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:16,855 INFO L82 PathProgramCache]: Analyzing trace with hash 730030661, now seen corresponding path program 1 times [2020-12-21 21:34:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:16,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6899653] [2020-12-21 21:34:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:17,116 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 21:34:17,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6899653] [2020-12-21 21:34:17,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:34:17,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:34:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242004837] [2020-12-21 21:34:17,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:34:17,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:34:17,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:34:17,145 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-12-21 21:34:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:17,243 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2020-12-21 21:34:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:34:17,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-21 21:34:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:17,256 INFO L225 Difference]: With dead ends: 61 [2020-12-21 21:34:17,256 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:34:17,260 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 21:34:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:34:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-21 21:34:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:34:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-21 21:34:17,306 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2020-12-21 21:34:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:17,307 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-21 21:34:17,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:34:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-21 21:34:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:34:17,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:17,308 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 21:34:17,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:34:17,309 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:17,310 INFO L82 PathProgramCache]: Analyzing trace with hash 798141757, now seen corresponding path program 1 times [2020-12-21 21:34:17,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:17,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808742082] [2020-12-21 21:34:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:17,389 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 21:34:17,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808742082] [2020-12-21 21:34:17,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809758833] [2020-12-21 21:34:17,390 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 21:34:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:34:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:17,591 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 21:34:17,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:17,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:34:17,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659149472] [2020-12-21 21:34:17,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:34:17,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:17,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:34:17,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:17,596 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2020-12-21 21:34:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:17,697 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2020-12-21 21:34:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:34:17,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-21 21:34:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:17,699 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:34:17,700 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:34:17,701 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 21:34:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:34:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-21 21:34:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:34:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-12-21 21:34:17,713 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 29 [2020-12-21 21:34:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:17,713 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-12-21 21:34:17,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:34:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-12-21 21:34:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:34:17,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:17,716 INFO L422 BasicCegarLoop]: trace histogram [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 21:34:17,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:34:17,932 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1968111935, now seen corresponding path program 2 times [2020-12-21 21:34:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:17,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140433044] [2020-12-21 21:34:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 21:34:18,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140433044] [2020-12-21 21:34:18,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645728483] [2020-12-21 21:34:18,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:18,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:18,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:34:18,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 21:34:18,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:18,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:34:18,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434565260] [2020-12-21 21:34:18,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:34:18,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:34:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:18,165 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-12-21 21:34:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:18,310 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-12-21 21:34:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:34:18,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-12-21 21:34:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:18,317 INFO L225 Difference]: With dead ends: 83 [2020-12-21 21:34:18,317 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 21:34:18,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 21:34:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-21 21:34:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:34:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-21 21:34:18,345 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2020-12-21 21:34:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:18,346 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-21 21:34:18,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:34:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-21 21:34:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:34:18,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:18,351 INFO L422 BasicCegarLoop]: trace histogram [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 21:34:18,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:18,565 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:18,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1959606083, now seen corresponding path program 3 times [2020-12-21 21:34:18,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:18,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118027338] [2020-12-21 21:34:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-21 21:34:18,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118027338] [2020-12-21 21:34:18,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516635188] [2020-12-21 21:34:18,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:18,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:34:18,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:18,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:34:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-21 21:34:18,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:18,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:34:18,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322353212] [2020-12-21 21:34:18,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:34:18,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:18,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:34:18,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:18,972 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 7 states. [2020-12-21 21:34:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:19,098 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2020-12-21 21:34:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:34:19,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-21 21:34:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:19,099 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:34:19,099 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:34:19,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 21:34:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:34:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-21 21:34:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:34:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-21 21:34:19,108 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 45 [2020-12-21 21:34:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:19,108 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-21 21:34:19,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:34:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-21 21:34:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:34:19,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:19,110 INFO L422 BasicCegarLoop]: trace histogram [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 21:34:19,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:19,327 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:19,329 INFO L82 PathProgramCache]: Analyzing trace with hash -33175999, now seen corresponding path program 4 times [2020-12-21 21:34:19,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:19,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657210822] [2020-12-21 21:34:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:34:19,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657210822] [2020-12-21 21:34:19,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218770204] [2020-12-21 21:34:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:19,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:19,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:34:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:34:19,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:19,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:34:19,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870221362] [2020-12-21 21:34:19,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:34:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:19,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:34:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:19,613 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2020-12-21 21:34:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:19,757 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2020-12-21 21:34:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:34:19,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-12-21 21:34:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:19,762 INFO L225 Difference]: With dead ends: 113 [2020-12-21 21:34:19,762 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:34:19,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 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 21:34:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:34:19,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-21 21:34:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:34:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-12-21 21:34:19,775 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2020-12-21 21:34:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:19,775 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-12-21 21:34:19,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:34:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-12-21 21:34:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:34:19,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:19,780 INFO L422 BasicCegarLoop]: trace histogram [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 21:34:19,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:19,998 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:20,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1705114563, now seen corresponding path program 5 times [2020-12-21 21:34:20,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:20,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338953272] [2020-12-21 21:34:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-21 21:34:20,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338953272] [2020-12-21 21:34:20,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887122979] [2020-12-21 21:34:20,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:35,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:34:35,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:35,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:34:35,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-21 21:34:35,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:35,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:34:35,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534868196] [2020-12-21 21:34:35,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:34:35,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:35,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:34:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:34:35,403 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2020-12-21 21:34:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:35,550 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2020-12-21 21:34:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:34:35,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-12-21 21:34:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:35,551 INFO L225 Difference]: With dead ends: 128 [2020-12-21 21:34:35,552 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 21:34:35,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:34:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 21:34:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-21 21:34:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:34:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-12-21 21:34:35,560 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 61 [2020-12-21 21:34:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:35,561 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-12-21 21:34:35,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:34:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-12-21 21:34:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:34:35,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:35,562 INFO L422 BasicCegarLoop]: trace histogram [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 21:34:35,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:34:35,777 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1731269183, now seen corresponding path program 6 times [2020-12-21 21:34:35,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:35,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038833420] [2020-12-21 21:34:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:34:35,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038833420] [2020-12-21 21:34:35,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209418099] [2020-12-21 21:34:35,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:40,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:34:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:34:40,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:34:40,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:40,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:34:40,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305530821] [2020-12-21 21:34:40,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:34:40,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:34:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:40,156 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 10 states. [2020-12-21 21:34:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:40,332 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2020-12-21 21:34:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:34:40,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-12-21 21:34:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:40,333 INFO L225 Difference]: With dead ends: 143 [2020-12-21 21:34:40,333 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:34:40,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:34:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-21 21:34:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:34:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-12-21 21:34:40,342 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 69 [2020-12-21 21:34:40,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:40,343 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-12-21 21:34:40,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:34:40,343 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-12-21 21:34:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:34:40,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:40,344 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-12-21 21:34:40,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:40,545 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:40,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1733009475, now seen corresponding path program 7 times [2020-12-21 21:34:40,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:40,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330975692] [2020-12-21 21:34:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-21 21:34:40,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330975692] [2020-12-21 21:34:40,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534866698] [2020-12-21 21:34:40,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:40,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:34:40,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-21 21:34:40,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:40,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:34:40,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699750043] [2020-12-21 21:34:40,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:34:40,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:40,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:34:40,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:40,958 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 11 states. [2020-12-21 21:34:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:41,161 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2020-12-21 21:34:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:34:41,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-12-21 21:34:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:41,168 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:34:41,169 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:34:41,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:34:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-21 21:34:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 21:34:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-21 21:34:41,198 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 77 [2020-12-21 21:34:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:41,198 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-21 21:34:41,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:34:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-21 21:34:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:34:41,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:41,202 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:41,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:41,416 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1139569985, now seen corresponding path program 8 times [2020-12-21 21:34:41,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:41,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532520020] [2020-12-21 21:34:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-21 21:34:41,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532520020] [2020-12-21 21:34:41,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678353233] [2020-12-21 21:34:41,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:41,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:34:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-21 21:34:41,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:41,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:34:41,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819543970] [2020-12-21 21:34:41,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:34:41,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:34:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:41,817 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 12 states. [2020-12-21 21:34:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:42,004 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2020-12-21 21:34:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:34:42,004 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-12-21 21:34:42,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:42,005 INFO L225 Difference]: With dead ends: 173 [2020-12-21 21:34:42,005 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:34:42,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:34:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-21 21:34:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 21:34:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-12-21 21:34:42,036 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 85 [2020-12-21 21:34:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:42,036 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-12-21 21:34:42,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:34:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-12-21 21:34:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 21:34:42,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:42,037 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:42,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:34:42,239 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:42,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1607850813, now seen corresponding path program 9 times [2020-12-21 21:34:42,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:42,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521879721] [2020-12-21 21:34:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-21 21:34:42,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521879721] [2020-12-21 21:34:42,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252001087] [2020-12-21 21:34:42,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:21,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:35:21,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:35:21,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:35:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-21 21:35:21,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:21,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:35:21,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976401462] [2020-12-21 21:35:21,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:35:21,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:21,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:35:21,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:35:21,882 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 13 states. [2020-12-21 21:35:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:22,096 INFO L93 Difference]: Finished difference Result 188 states and 211 transitions. [2020-12-21 21:35:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:35:22,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2020-12-21 21:35:22,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:22,101 INFO L225 Difference]: With dead ends: 188 [2020-12-21 21:35:22,102 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 21:35:22,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 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 21:35:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 21:35:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-12-21 21:35:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-21 21:35:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-12-21 21:35:22,109 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 93 [2020-12-21 21:35:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:22,109 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-12-21 21:35:22,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:35:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-12-21 21:35:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 21:35:22,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:22,111 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:22,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:22,312 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1782471873, now seen corresponding path program 10 times [2020-12-21 21:35:22,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:22,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441103007] [2020-12-21 21:35:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-21 21:35:22,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441103007] [2020-12-21 21:35:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077467820] [2020-12-21 21:35:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:22,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:35:22,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:35:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:35:22,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-21 21:35:22,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:22,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:35:22,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679095054] [2020-12-21 21:35:22,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:35:22,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:35:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:35:22,729 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 14 states. [2020-12-21 21:35:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:22,984 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2020-12-21 21:35:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:35:22,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2020-12-21 21:35:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:22,986 INFO L225 Difference]: With dead ends: 203 [2020-12-21 21:35:22,986 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 21:35:22,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:35:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 21:35:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-21 21:35:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-21 21:35:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-12-21 21:35:22,995 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 101 [2020-12-21 21:35:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:22,995 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-12-21 21:35:22,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:35:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-12-21 21:35:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-21 21:35:22,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:22,997 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:23,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:23,212 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1734506173, now seen corresponding path program 11 times [2020-12-21 21:35:23,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:23,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712521369] [2020-12-21 21:35:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-12-21 21:35:23,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712521369] [2020-12-21 21:35:23,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481052508] [2020-12-21 21:35:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true